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  • 1
    Call number: ZSP-168-640
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: Series available for loan
    Pages: ii, 192 S. : Ill., graph. Darst., Kt.
    Series Statement: Berichte zur Polar- und Meeresforschung 640
    Language: English
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  • 2
    Monograph available for loan
    Monograph available for loan
    Princeton : Princeton University Press
    Call number: AWI G3-12-0048
    Description / Table of Contents: Contents: Chapter 1: Introduction to the Cryosphere. - Chapter 2: Material Properties of Snow and Ice. - Chapter 3: Snow and Ice Thermodynamics. - Chapter 4: Seasonal Snow and Freshwater Ice. - Chapter 5: Sea Ice. - Chapter 6: Glaciers and Ice Sheets. - Chapter 7: Permafrost. - Chapter 8: Cryosphere-Climate Processes. - Chapter 9: The Cryosphere and Climate Change.
    Description / Table of Contents: The cryosphere encompasses the Earth's snow and ice masses. It is a critical part of our planet's climate system, one that is especially at risk from climate change and global warming. "The Cryosphere" provides an essential introduction to the subject, written by one of the world's leading experts in Earth-system science. In this primer, glaciologist Shawn Marshall introduces readers to the cryosphere and the broader role it plays in our global climate system. After giving a concise overview, he fully explains each component of the cryosphere and how it works - seasonal snow, permafrost, river and lake ice, sea ice, glaciers, ice sheets, and ice shelves. Marshall describes how snow and ice interact with our atmosphere and oceans and how they influence climate, sea level, and ocean circulation. He looks at the cryosphere's role in past ice ages, and considers the changing cryosphere's future impact on our landscape, oceans, and climate. Accessible and authoritative, this primer also features a glossary of key terms, suggestions for further reading, explanations of equations, and a discussion of open research questions in the field.
    Type of Medium: Monograph available for loan
    Pages: IX, 288 Seiten , Illustrationen
    ISBN: 9780691145266
    Series Statement: Princeton primers in climate
    Language: English
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  • 3
    Monograph available for loan
    Monograph available for loan
    Princeton [u.a.] : Princeton Univ. Press
    Call number: AWI A3-13-0048
    Description / Table of Contents: The atmosphere is critical to climate change. It can amplify shifts in the climate system, and also mitigate them. This primer offers a short, reader-friendly introduction to these atmospheric processes and how they work, written by a leading expert on the subject. Giving readers an overview of key atmospheric processes, David Randall looks at how our climate system receives energy from the sun and sheds it by emitting infrared radiation back into space. The atmosphere regulates these radiative energy flows and transports energy through weather systems such as thunderstorms, monsoons, hurricanes, and winter storms. Randall explains how these processes work, and also how precipitation, cloud formation, and other phase changes of water strongly influence weather and climate. He discusses how atmospheric feedbacks affect climate change, how the the large-scale atmospheric circulation works, how predicting the weather and the climate are fundamentally different challenges, and much more. This is the ideal introduction for students and nonspecialists. No prior experience in atmospheric science is needed, only basic college physics.
    Type of Medium: Monograph available for loan
    Pages: VIII, 277 S. : Ill., graph. Darst.
    ISBN: 9780691143750
    Series Statement: Princeton primers in climate
    Language: English
    Note: Contents: Preface. - 1 Basics. - 2 Radiative energy flows. - 3 How turbulence and cumulus clouds carry energy upward. - Appendix to Chapter 3: More about Eddy Fluxes. - 4 How energy travels from the tropics to the poles. - Appendix to chapter 4: Conservation of momentum on a rotating sphere. - 5 Feedbacks. - 6 The water planet. - 7 Predictability of weather and climate. - 8 Air, sea, land. - 9 Frontiers. - Notes. - Glossary. - Suggestions for further reading. - Bibliography. - Index.
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  • 4
    Monograph available for loan
    Monograph available for loan
    Cambridge : Cambridge Univ. Press
    Call number: AWI P6-13-0049
    Description / Table of Contents: Antarctica is the coldest and driest continent on earth - a place for adventure and a key area for global science. Research conducted in this extreme environment has received increasing international attention in recent years due to concerns over destruction of the ozone layer above it and the problems of global warming and rising sea levels. Data collected in the Antarctic now informs a wide range of scientific fields. A record of the globe's climate is locked up in its deep snow and ice while, as part of the early supercontinent Gondwana, its rocks have much to teach us about the geological history of the earth. Adiversity of unique plants and animals abound in Antarctic waters and the clear skies overhead allow astronomers to probe the outer reaches of the universe. Governed internationally since 1959, the Antarctic is also an object lesson in collaboration between nations. This dramatically illustrated new book brings together an international group of leading Antarctic scientists to explain why the Antarctic is so central to understanding the history and potential fate of our planet. It introduces the beauty of the world's greatest wilderness, its remarkable attributes, and the global importance of the international science done there. Spanning topics from marine biology to space science, this book is an accessible overview for anyone interested in the Antarctic and its science and governance. It provides a valuable summary for those involved in polar management and development of new research programmes, and is an inspiration for the next generation of Antarctic researchers.
    Type of Medium: Monograph available for loan
    Pages: xii, 342 S. : Ill., graph. Darst., Kt.
    ISBN: 9781107003927
    Language: English
    Note: Contents: List of contributors. - Introduction. - 1 Discovering the unknown continent. - 2 A keystone in a changing world. - 3 Ice with everything. - 4 Climate of extremes. - 5 Stormy and icy seas. - 6 Life in a cold environment. - 7 Space science research from Antarctica. - 8 Living and working in the cold. - 9 Scientists together in the cold. - 10 Managing the frozen commons. - 11 Antarctica: a global change perspective. - Appendix A Visiting Antarctica. - Appendix B Further reading. - Acknowledgements. - Index.
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  • 5
    Monograph available for loan
    Monograph available for loan
    Cambridge : Cambridge University Press
    Call number: PIK N 630-13-0084 ; AWI Bio-22-20909
    Type of Medium: Monograph available for loan
    Pages: XII, 178 Seiten , Illustrationen
    ISBN: 0-521-30868-2 , 0-521-54409-2
    Language: English
    Note: Contents Preface Acknowledgements 1 Introduction Terms and abbreviations 2 The biogeographlcal setting Geology, physiography, and surface materials The structural framework Pleistocene geology Bioclimates Arctic and its three subzones Subarctic zone Boreal zone Eastern temperate zone Grassland zone Pacific and Cordilleran zones 3 Autecology and pollen representation Introduction Transcontinental, primarily boreal taxa Eastern, primarily temperate taxa Pacific-Cordilleran taxa Arctic taxa Modern regional pollen spectra The Western Interior The eastern plains transect The Pacific-Cordilleran transect General comments on the modern pollen spectra 4 Full-glacial refugla The southern refugia Pacific-Cordilleran refugia Interior plains and eastern region The Beringian refugia 5 Eastern Canada-fossil record and reconstruction Introduction The late glacial - 12,700 to 10,000 yr BP Southern Quebec and New Brunswick Maritime Canada The Great Lakes Basin Vegetation reconstruction The Holocene - 10,000 yr BP to the present Southern Quebec and New Brunswick The Maritimes, Labrador, and Northern Quebec The Great Lakes Vegetation reconstruction Boreal region 6 The Western Interior Sites near the forest-grassland transition Sites within the modern boreal forest Sites near the modern forest-tundra boundary 7 Pacific-Cordilleran region Southern Pacific zone Southern Cordilleran zone Northern Pacific zone Northern Cordilleran zone 8 Vegetation reconstruction and palaeoenvironments Introduction Origins and history Eastern temperate forests Boreal forest Grasslands and parklands Pacific-Cordilleran complex Tundra (arctic) Palaeoenvironmental controls Climate The Milankovitch model Full-glacial conditions Late-glacial and Holocene Fire Pathogens Paludification Problems for the future Climate disequilibrium Spatial resolution Pollen source area Concluding comments Appendix References Index
    Location: A 18 - must be ordered
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  • 6
    Call number: AWI A14-13-0083 ; ad AWI A14-13-0083
    Description / Table of Contents: This handbook provides the first comprehensive review of measurement principles, instruments and processing techniques for airborne observation of the earth's atmosphere and surface. For each field, the major prinicples of measurement are presented and illustrated with commonly-used airborne instruments, to assess the present capabilities in terms of accuracy, to raise awareness of specific issues with the interpretation of measurements from airborne operations, and to review emerging measurement techniques. The authors are internationally-recognized experts in their field, who actively contribute to the design and developement of modern airborne instrumentation and processing techniques. While primarily intended for climate, geophysical and atmospheric researchers, its relevance to the solar system makes this work useful to astronomers studying planetary atmospheres with telescopes and space probes.
    Type of Medium: Monograph available for loan
    Pages: XXXII, 655 Seiten , Illustrationen
    ISBN: 9783527409969
    Series Statement: Wiley series in atmospheric physics and remote sensing
    Language: English
    Note: Contents Preface A Tribute to Dr. Robert Knollenberg List of Contributors 1 Introduction to Airborne Measurements of the Earth Atmosphere and Surface / Ulrich Schumann, David W. Fahey, Manfred Wendisch, and Jean-Louis Brenguier 2 Measurement of Aircraft State and Thermodynamic and Dynamic Variables / Jens Bange, Marco Esposito, Donald H. Lenschow, Philip R. A. Brown,Volker Dreiling, Andreas Giez, Larry Mahrt, Szymon P. Malinowski, Alfred R. Rodi, Raymond A. Shaw, Holger Siebert, Herman Smit, Martin Zöger 2.1 Introduction 2.2 Historical 2.3 Aircraft State Variables 2.3.1 Barometric Measurement of Aircraft Height 2.3.2 Inertial Attitude, Velocity, and Position 2.3.2.1 System Concepts 2.3.2.2 Attitude Angle Definitions 2.3.2.3 Gyroscopes and Accelerometers 2.3.2.4 Inertial-Barometric Corrections 2.3.3 Satellite Navigation by Global Navigation Satellite Systems 2.3.3.1 GNSS Signals 2.3.3.2 Differential GNSS 2.3.3.3 Position Errors and Accuracy of Satellite Navigation 2.3.4 Integrated IMU/GNSS Systems for Position and Attitude Determination 2.3.5 Summary, Gaps, Emerging Technologies 2.4 Static Air Pressure 2.4.1 Position Error 2.4.1.1 Tower Flyby 2.4.1.2 Trailing Sonde 2.4.2 Summary 2.5 Static Air Temperature 2.5.1 Aeronautic Definitions of Temperatures 2.5.2 Challenges of Airborne Temperature Measurements 2.5.3 Immersion Probe 2.5.4 Reverse-Flow Sensor 2.5.5 Radiative Probe 2.5.6 Ultrasonic Probe 2.5.7 Error Sources 2.5.7.1 Sensor 2.5.7.2 Dynamic Error Sources 2.5.7.3 In-Cloud Measurements 2.5.8 Calibration of Temperature Sensors 2.5.9 Summary, Gaps, Emerging Technologies 2.6 Water Vapor Measurements 2.6.1 Importance of Atmospheric Water Vapor 2.6.2 Humidity Variables 2.6.3 Dew or Frost Point Hygrometer 2.6.4 Lyman-α Absorption Hygrometer 2.6.5 Lyman-α Fluorescence Hygrometer 2.6.6 Infrared Absorption Hygrometer 2.6.7 Tunable Laser Absorption Spectroscopy Hygrometer 2.6.8 Thin Film Capacitance Hygrometer 2.6.9 Total Water Vapor and Isotopic Abundances of 18O and 2H 2.6.10 Factors Influencing In-Flight Performance 2.6.10.1 Sticking of Water Vapor at Surfaces 2.6.10.2 Sampling Systems 2.6.11 Humidity Measurements with Dropsondes 2.6.12 Calibration and In-Flight Validation 2.6.13 Summary and Emerging Technologies 2.7 Three-Dimensional Wind Vector 2.7.1 Airborne Wind Measurement Using Gust Probes 2.7.1.1 True Airspeed (TAS) and Aircraft Attitude 2.7.1.2 Wind Vector Determination 2.7.1.3 Baseline Instrumentation 2.7.1.4 Angles of Attack and Sideslip 2.7.2 Errors and Flow Distortion 2.7.2.1 Parameterization Errors 2.7.2.2 Measurement Errors 2.7.2.3 Timing Errors 2.7.2.4 Errors due to Incorrect Sensor Configuration 2.7.3 In-Flight Calibration 2.8 Small-Scale Turbulence 2.8.1 Hot-Wire/Hot-Film Probes for High-Resolution Flow Measurements 2.8.2 Laser Doppler Anemometers 2.8.3 Ultrasonic Anemometers/Thermometers 2.8.4 Measurements of Atmospheric Temperature Fluctuations with Resistance Wires 2.8.5 Calibration of Fast-Response Sensors 2.8.6 Summary, Gaps, and Emerging Technologies 2.9 Flux Measurements 2.9.1 Basics 2.9.2 Measurement Errors 2.9.3 Flux Sampling Errors 2.9.3.1 Systematic Flux Error 2.9.3.2 Random Flux Error 2.9.4 Area-Averaged Turbulent Flux 2.9.5 Preparation for Airborne Flux Measurement 3 In SituTrace Gas Measurements / Jim McQuaid, Hans Schlager, Maria Dolores Andrés-Hernández,Stephen Ball, Agnès Borbon, Steve S. Brown, Valery Catoire, Piero Di Carlo, Thomas G. Custer, Marc von Hobe, James Hopkins, Klaus Pfeilsticker, Thomas Röckmann, Anke Roiger, Fred Stroh, Jonathan Williams, and Helmut Ziereis 3.1 Introduction 3.2 Historical and Rationale 3.3 Aircraft Inlets for Trace Gases 3.4 Examples of Recent Airborne Missions 3.5 Optical In SituTechniques 3.5.1 UV Photometry 3.5.2 Differential Optical Absorption Spectroscopy 3.5.2.1 Measurement Principle 3.5.2.2 Examples of Measurement 3.5.3 Cavity Ring-Down Spectroscopy 3.5.3.1 Measurement Principle 3.5.3.2 Aircraft Implementation 3.5.3.3 Calibration and Uncertainty 3.5.3.4 Broadband Cavity Spectroscopic Methods 3.5.4 Gas Filter Correlation Spectroscopy 3.5.5 Tunable Laser Absorption Spectroscopy 3.5.5.1 Tunable Diode Versus QCLs 3.5.5.2 Further Progress 3.5.6 Fluorescence Techniques 3.5.6.1 Resonance Fluorescence 3.5.6.2 LIF Techniques 3.5.6.3 Chemical Conversion Resonance Fluorescence Technique 3.6 Chemical Ionization Mass Spectrometry 3.6.1 Negative-Ion CIMS 3.6.1.1 Measurement Principle and Aircraft Implementation 3.6.1.2 Calibration and Uncertainties 3.6.1.3 Measurement Example 3.6.2 The Proton Transfer Reaction Mass Spectrometer 3.6.3 Summary and Future Perspectives 3.7 Chemical Conversion Techniques 3.7.1 Peroxy Radical Chemical Amplification 3.7.1.1 Measurement Principles 3.7.1.2 Airborne Measurements 3.7.1.3 Calibration and Uncertainties 3.7.2 Chemiluminescence Techniques 3.7.2.1 Measurement Principle 3.7.2.2 Measurement of Ozone Using Chemiluminescence 3.7.2.3 NOy and NO2 Conversion 3.7.2.4 Calibration and Uncertainties 3.7.2.5 Measurement Examples 3.7.2.6 Summary 3.7.3 Liquid Conversion Techniques 3.7.3.1 Measurement Principles 3.7.3.2 Aircraft Implementation 3.7.3.3 Data Processing 3.7.3.4 Limitations, Uncertainties, and Error Propagation 3.7.3.5 Calibration and Maintenance 3.7.3.6 Measurement Examples 3.7.3.7 Summary and Emerging Technologies 3.8 Whole Air Sampler and Chromatographic Techniques 3.8.1 Rationale 3.8.2 Whole Air Sampling Systems 3.8.2.1 Design of Air Samplers 3.8.2.2 The M55-Geophysica Whole Air Sampler 3.8.3 Water Vapor Sampling for Isotope Analysis 3.8.4 Measurement Examples 3.8.5 Off-Line Analysis of VOCs 3.8.5.1 Air Mass Ageing 3.8.5.2 Using VOC Observations to Probe Radical Chemistry 4 In Situ Measurements of Aerosol Particles / Andreas Petzold, Paola Formenti, Darrel Baumgardner, Ulrich Bundke, Hugh Coe, Joachim Curtius, Paul J. DeMott, Richard C. Flagan, Markus Fiebig, James G. Hudson, Jim McQuaid, Andreas Minikin, Gregory C. Roberts, and Jian Wang 4.1 Introduction 4.1.1 Historical Overview 4.1.2 Typical Mode Structure of Aerosol Particle Size Distribution 4.1.3 Quantitative Description of Aerosol Particles 4.1.4 Chapter Structure 4.2 Aerosol Particle Number Concentration 4.2.1 Condensation Particle Counters 4.2.2 Calibration of Cut-Off and Low-Pressure Detection Efficiency 4.3 Aerosol Particle Size Distribution 4.3.1 Single-Particle Optical Spectrometers 4.3.1.1 Measurement Principles and Implementation 4.3.1.2 Measurement Issues 4.3.2 Aerodynamic Separators 4.3.3 Electrical Mobility Measurements of Particle Size Distributions 4.3.4 Inversion Methods 4.4 Chemical Composition of Aerosol Particles 4.4.1 Direct Offline Methods 4.4.2 Direct Online Methods (Aerosol Mass Spectrometer, Single Particle Mass Spectrometer, and Particle-Into-Liquid Sampler) 4.4.2.1 Bulk Aerosol Collection and Analysis 4.4.2.2 Mass Spectrometric Methods 4.4.2.3 Incandescence Methods 4.4.3 Indirect Methods 4.5 Aerosol Optical Properties 4.5.1 Scattering Due to Aerosol Particles 4.5.2 Absorption of Solar Radiation Due to Aerosol Particles 4.5.2.1 Filter-Based Methods 4.5.2.2 In Situ Methods 4.5.2.3 Airborne Application 4.5.3 Extinction Due to Aerosol Particles 4.5.4 Inversion Methods 4.6 CCN and IN 4.6.1 CCN Measurements Methods 4.6.2 IN Measurement Methods 4.6.3 Calibration 4.6.3.1 CCN Instrument Calibration 4.6.3.2 IN Instrument Calibration 4.7 Challenges and Emerging Techniques 4.7.1 Particle Number 4.7.2 Particle Size 4.7.3 Aerosol Optical Properties 4.7.4 Chemical Composition of Aerosol Particles 4.7.5 CCN Measurements 4.7.6 IN Measurements 5 In Situ Measurements of Cloud and Precipitation Particles / Jean-Louis Brenguier, William Bachalo, Patrick Y. Chuang, Biagio M. Esposito, Jacob Fugal, Timothy Garrett, Jean-Francois Gayet, Hermann Gerber, Andy Heymsfield, Alexander Kokhanovsky, Alexei Korolev, R. Paul Lawson, David C. Rogers, Raymond A. Shaw, Walter Strapp, and Manfred Wendisch 5.1 Introduction 5.1.1 Rationale 5.1.2 Characterization of Cloud Microphysical Properties 5.1.3 Chapter Outline 5.
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  • 7
    Call number: AWI A12-13-0137
    Description / Table of Contents: The second edition of this internationally acclaimed text presents the latest developments in atmospheric science. It continues to be the premier text for both a rigorous and a complete treatment of the chemistry of the atmosphere, covering such pivotal topics as: chemistry of the stratosphere and troposphere; formation, growth, dynamics, and properties of aerosols; meteorology of air pollution; transport, diffusion, and removal of species in the atmosphere; formation and chemistry of clouds; interaction of atmospheric chemistry and climate; radiative and climatic effects of gases and particles; formulation of mathematical chemical/transport models of the atmosphere. All chapters develop results based on fundamental principles, enabling the reader to build a solid understanding of the science underlying atmospheric processes. Among the new material are three new chapters: Atmospheric radiation and photochemistry, gernal circulation of the atmosphere, and global cycles. In addition, the chapters Stratospheric chemistry, tropospheric chemistry, and organic atmospheric aerosols have been rewritten to reflect the latest findings. Readers familiar with the first edition will discover a text with new structures and new features that greatly aid learning. Many examples are set off in the text to help readers work through the application of concepts. Advanced material has been moved to appendices. Finally, many new problems, coded by degree of difficulty, have been added. A solutions manual is available. Throughly updated and restructured, the second edition of Atmospheric chemistry and physics is an ideal textbook for upper-level undergraduate and graduate students, as well as a reference for researchers in environmental engineering, meteorology, chemistry, and the atmospheric sciences.
    Type of Medium: Monograph available for loan
    Pages: xxviii, 1203 Seiten , Illustrationen
    Edition: Second edition
    ISBN: 9780471720188
    Series Statement: A Wiley-Interscience publication
    Language: English
    Note: CONTENTS: Preface to the Second Edition. - Preface to the First Edition. - 1 The Atmosphere. - 1.1 History and Evolution of the Earth's Atmosphere. - 1.2 Climate. - 1.3 The Layers of the Atmosphere. - 1.4 Pressure in the Atmosphere. - 1.4.1 Units of Pressure. - 1.4.2 Variation of Pressure with Height in the Atmosphere. - 1.5 Temperature in the Atmosphere. - 1.6 Expressing the Amount of a Substance in the Atmosphere. - 1.7 Spatial and Temporal Scales of Atmospheric Processes. - Problems. - References. - 2 Atmospheric Trace Constituents. - 2.1 Atmospheric Lifetime. - 2.2 Sulfur-Containing Compounds. - 2.2.1 Dimethyl Sulfide (CH3SCH3). - 2.2.2 Carbonyl Sulfide (OCS). - 2.2.3 Sulfur Dioxide (SO2). - 2.3 Nitrogen-Containing Compounds. - 2.3.1 Nitrous Oxide (N2O). - 2.3.2 Nitrogen Oxides (NO* = NO + NO2). - 2.3.3 Reactive Odd Nitrogen (NOy). - 2.3.4 Ammonia (NH3). - 2.4 Carbon-Containing Compounds. - 2.4.1 Classification of Hydrocarbons. - 2.4.2 Methane. - 2.4.3 Volatile Organic Compounds. - 2.4.4 Biogenic Hydrocarbons. - 2.4.5 Carbon Monoxide. - 2.4.6 Carbon Dioxide. - 2.5 Halogen-Containing Compounds. - 2.5.1 Methyl Chloride (CH3C1). - 2.5.2 Methyl Bromide (CH3Br). - 2.6 Atmospheric Ozone. - 2.7 Particulate Matter (Aerosols). - 2.7.1 Stratospheric Aerosol. - 2.7.2 Chemical Components of Tropospheric Aerosol. - 2.7.3 Cloud Condensation Nuclei (CCN). - 2.7.4 Sizes of Atmospheric Particles. - 2.7.5 Sources of Atmospheric Paniculate. - 2.7.6 Carbonaceous Particles. - 2.7.7 Mineral Dust. - 2.8 Emission Inventories. - 2.9 Biomass Burning. - Appendix 2.1 Air Pollution Legislation. - Appendix 2.2 Hazardous Air Pollutants (Air Toxics). - Problems. - References. - 3 Chemical Kinetics. - 3.1 Order of Reaction. - 3.2 Theories of Chemical Kinetics. - 3.2.1 Collision Theory. - 3.2.2 Transition State Theory. - 3.2.3 Potential Energy Surface for a Bimolecular Reaction. - 3.3 The Pseudo-Steady-State Approximation. - 3.4 Reactions of Excited Species. - 3.5 Termolecular Reactions. - 3.6 Chemical Families. - 3.7 Gas-Surface Reactions. - Appendix 3 Free Radicals. - Problems. - References. - 4 Atmospheric Radiation and Photochemistry. - 4.1 Radiation. - 4.1.1 Solar and Terrestrial Radiation. - 4.1.2 Energy Balance for Earth and Atmosphere. - 4.1.3 Solar Variability. - 4.2 Radiative Flux in the Atmosphere. - 4.3 Beer-Lambert Law and Optical Depth. - 4.4 Actinic Flux. - 4.5 Atmospheric Photochemistry. - 4.6 Absorption of Radiation by Atmospheric Gases. - 4.7 Absorption by O2 and O3 122. - 4.8 Photolysis Rate as a Function of Altitude. - 4.9 Photodissociation of O3 to Produce O and O(1D). - 4.10 Photodissociation of NO2. - Problems. - References. - 5 Chemistry of the Stratosphere. - 5.1 Overview of Stratospheric Chemistry. - 5.2 Chapman Mechanism. - 5.3 Nitrogen Oxide Cycles. - 5.3.1 Stratospheric Source of NO* from N2O. - 5.3.2 NO* Cycles. - 5.4 HO* Cycles. - 5.5 Halogen Cycles. - 5.5.1 Chlorine Cycles. - 5.5.2 Bromine Cycles. - 5.6 Reservoir Species and Coupling of the Cycles. - 5.7 Ozone Hole. - 5.7.1 Polar Stratospheric Clouds. - 5.7.2 PSCs and the Ozone Hole. - 5.7.3 Arctic Ozone Hole. - 5.8 Heterogeneous (Nonpolar) Stratospheric Chemistry. - 5.8.1 The Stratospheric Aerosol Layer. - 5.8.2 Heterogeneous Hydrolysis of N2O5. - 5.8.3 Effect of Volcanoes on Stratospheric Ozone. - 5.9 Summary of Stratospheric Ozone Depletion. - 5.10 Transport and Mixing in the Stratosphere. - 5.11 Ozone Depletion Potential. - Problems. - References. - 6 Chemistry of the Troposphere. - 6.1 Production of Hydroxyl Radicals in the Troposphere. - 6.2 Basic Photochemical Cycle of NO2, NO, and O3. - 6.3 Atmospheric Chemistry of Carbon Monoxide. - 6.3.1 Low NO* Limit. - 6.3.2 High NO* Limit. - 6.3.3 Ozone Production Efficiency. - 6.3.4 Theoretical Maximum Yield of Ozone from CO Oxidation. - 6.4 Atmospheric Chemistry of Methane. - 6.5 The NO* and NOy, Families. - 6.5.1 Daytime Behavior. - 6.5.2 Nighttime Behavior. - 6.6 Ozone Budget of the Troposphere and Role of NO*. - 6.6.1 Ozone Budget of the Troposphere. - 6.6.2 Role of NO*. - 6.7 Tropospheric Reservoir Molecules. - 6.7.1 H2O2, CH3OOH, and HONO. - 6.7.2 Peroxyacyl Nitrates (PANs). - 6.8 Relative Roles of VOC and NOx in Ozone Formation. - 6.8.1 Importance of the VOC/NOx Ratio. - 6.8.2 Ozone Isopleth Plot. - 6.9 Simplified Organic/NOx Chemistry. - 6.10 Chemistry of Nonmethane Organic Compounds in the Troposphere. - 6.10.1 Alkanes. - 6.10.2 Alkenes. - 6.10.3 Aromatics. - 6.10.4 Aldehydes. - 6.10.5 Ketones. - 6.10.6 α, β-Unsaturated Carbonyls. - 6.10.7 Ethers. - 6.10.8 Alcohols. - 6.11 Atmospheric Chemistry of Biogenic Hydrocarbons. - 6.12 Atmospheric Chemistry of Reduced Nitrogen Compounds. - 6.12.1 Amines. - 6.12.2 Nitriles. - 6.12.3 Nitrites. - 6.13 Atmospheric Chemistry (Gas Phase) of Sulfur Compounds. - 6.13.1 Sulfur Oxides. - 6.13.2 Reduced Sulfur Compounds (Dimethyl Sulfide). - 6.14 Tropospheric Chemistry of Halogen Compounds. - 6.14.1 Chemical Cycles of Halogen Species. - 6.14.2 Tropospheric Chemistry of CFC Replacements: Hydrofluorocarbons (HFCs) and Hydrochlorofluorocarbons (HCFCs). - Problems. - References. - 7 Chemistry of the Atmospheric Aqueous Phase. - 7.1 Liquid Water in the Atmosphere. - 7.2 Absorption Equilibria and Henry's Law. - 7.3 Aqueous-Phase Chemical Equilibria. - 7.3.1 Water. - 7.3.2 Carbon Dioxide-Water Equilibrium. - 7.3.3 Sulfur Dioxide-Water Equilibrium. - 7.3.4 Ammonia-Water Equilibrium. - 7.3.5 Nitric Acid-Water Equilibrium. - 7.3.6 Equilibria of Other Important Atmospheric Gases. - 7.4 Aqueous-Phase Reaction Rates. - 7.5 S(IV)-S(VI) Transformation and Sulfur Chemistry. - 7.5.1 Oxidation of S(IV) by Dissolved O3. - 7.5.2 Oxidation of S(IV) by Hydrogen Peroxide. - 7.5.3 Oxidation of S(IV) by Organic Peroxides. - 7.5.4 Uncatalyzed Oxidation of S(IV) by O2. - 7.5.5 Oxidation of S(IV) by O2 Catalyzed by Iron and Manganese. - 7.5.6 Comparison of Aqueous-Phase S(IV) Oxidation Paths. - 7.6 Dynamic Behavior of Solutions with Aqueous-Phase Chemical Reactions. - 7.6.1 Closed System. - 7.6.2 Calculation of Concentration Changes in a Droplet with Aqueous-Phase Reactions. - Appendix 7.1 Thermodynamic and Kinetic Data. - Appendix 7.2 Additional Aqueous-Phase Sulfur Chemistry. - 7.A.1 S(IV) Oxidation by the OH Radical. - 7.A.2 Oxidation of S(IV) by Oxides of Nitrogen. - 7.A.3 Reaction of Dissolved SO2 with HCHO. - Appendix 7.3 Aqueous-Phase Nitrite and Nitrate Chemistry. - 7.A.4 NOx Oxidation. - 7.A.5 Nitrogen Radicals. - Appendix 7.4 Aqueous-Phase Organic Chemistry. - Appendix 7.5 Oxygen and Hydrogen Chemistry. - Problems. - References. - 8 Properties of the Atmospheric Aerosol. - 8.1 The Size Distribution Function. - 8.1.1 The Number Distribution nN(Dp). - 8.1.2 The Surface Area, Volume, and Mass Distributions. - 8.1.3 Distributions Based on In Dp and log Dp. - 8.1.4 Relating Size Distributions Based on Different Independent Variables. - 8.1.5 Properties of Size Distributions. - 8.1.6 The Lognormal Distribution. - 8.1.7 Plotting the Lognormal Distribution. - 8.1.8 Properties of the Lognormal Distribution. - 8.2 Ambient Aerosol Size Distributions. - 8.2.1 Urban Aerosols. - 8.2.2 Marine Aerosols. - 8.2.3 Rural Continental Aerosols. - 8.2.4 Remote Continental Aerosols. - 8.2.5 Free Tropospheric Aerosols. - 8.2.6 Polar Aerosols. - 8.2.7 Desert Aerosols. - 8.3 Aerosol Chemical Composition. - 8.4 Spatial and Temporal Variation. - 8.5 Vertical Variation. - Problems. - References. - 9 Dynamics of Single Aerosol Particles. - 9.1 Continuum and Noncontinuum Dynamics: The Mean Free Path. - 9.2 The Drag on a Single Particle: Stokes' Law. - 9.2.1 Corrections to Stokes' Law: The Drag Coefficient. - 9.2.2 Stokes' Law and Noncontinuum Effects: Slip Correction Factor. - 9.3 Gravitational Settling of an Aerosol Particle. - 9.4 Motion of an Aerosol Particle in an External Force Field. - 9.5 Brownian Motion of Aerosol Particles. - 9.5.1 Particle Diffusion. - 9.5.2 Aerosol Mobility and Drift Velocity. - 9.5.3 Mean Free Path of an Aerosol Particle. - 9.6 Aer
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  • 8
    Series available for loan
    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-308
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Sea ice as a material. - Experimental procedures. - Results and analysis. - Conclusion. - Literature cited. - Appendix A. Error analysis. - Abstract.
    Description / Table of Contents: An investigation is made into the determination of the relationship between the extinction coefficient and the salinity of sea ice. A HeNe laser is used to propagate a beam of red light, of wavelength 6328Å, through a series of ice samples at -20°C. The optical extinction coefficients were calculated and plotted against the measured salinities. The results of the experiment indicated an exponential relationship between extinction coefficient and salinity. The relationship may be described by the equation: y = 2.41 + 0.001 exp (1.19x) where y is the extinction coefficient and x is the salinity.
    Type of Medium: Series available for loan
    Pages: iii, 15 Seiten , Illutrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 308
    Language: English
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  • 9
    Series available for loan
    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-306
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - 1. Coastal stations. - Alaska. - Canada. - Greenland. - Europe and Russia. - II. The interior Arctic Ocean. - Zone 1. - Zone 2.. - Zone 3. - Zone 4. - Zone 5. - Zone 6.. - Summary and discussion. - Supplemental data. - Literature cited. - Appendix A. Winds. - Appendix B. Arctic surface winds. - Appendix C. Excerpt from Cold Regions Science and Engineering, USA CRREL Monograph I-A3b. - Appendix D. Excerpt from Proceedings of the Arctic Basin Symposium October 1962. - Abstract.
    Description / Table of Contents: Prevailing monthly and seasonal surface wind directions were obtained from 1) weather records for 21 coastal stations around the Arctic Ocean and 2) a series of U.S. Navy wind charts for 15 to 20 locations in the arctic marginal seas and the ocean's interior. This information was combined and analyzed to develop 2 charts which depict the surface flow of air in these areas during the mid-summer and mid-winter months. Since the ice floe stations used in the offshore wind analysis are not permanently located, the Arctic Ocean was selectively divided into 6 zones. Three of these zones separate Polar regions north of 84°N latitude, and 3 other zones each separate the seas bordering the north coasts of Europe, Siberian Russia and North America. Except for a few stations where wind directions are apparently controlled by local influences the results showed the following mid-winter patterns: 1) a near anticlockwise flow within the circle north of 75°N, 2) winds from the north in and near the Chukchi and Bering Seas, 3) northeast winds along the Alaskan coast and northwest along the Canadian Archipelago Islands, and 4) southwest and southeast winds along the northern coasts of Europe and Asia respectively. Although the wind directions during mid-summer become more variable the study showed that the prevailing surface winds for most areas in this season are nearly opposite those observed in winter.
    Type of Medium: Series available for loan
    Pages: iii, 55 Seiten , Illustrationen, Karten
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 306
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  • 10
    Series available for loan
    Series available for loan
    Hanover, N.H. : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-297
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Glenn Creek watershed. - Location. - Topography. - Geology, soils and permafrost. - Climate. - Vegetation. - Data collection. - Precipitation. - Stream flow. - Air temperature and relative humidity. - Water temperature. - Evaporation. - Snow surveys. - Depth of thaw. - Dissolved solids. - Hydrology. - Introduction. - General channel description. - Hydraulic geometry. - Characteristics of hydrographs. - Sources of streamflow. - Attempts at flow separation. - Hydrograph modeling. - Summary and conclusions. - Literature cited. - Appendix A: Summary of permafrost probe observations, Glenn Creek watershed.. - Appendix B: Water-holding and-transmitting properties of moss. - Appendix C: Summary of hydraulic geometry data from 1964 discharge measurements. - Appendix D: Summary of data used in computing recession constants.
    Description / Table of Contents: The results of a four-summer (1964-1967) hydrologic study of the watershed of Glenn Creek, about 8 miles north of Fairbanks, Alaska, in the Yukon-Tanana uplands physiographic province, are presented. This work was initiated to provide initial baseline hydrologic data for a small subar ctic watershed, the first of its kind in North America. Standard hydrologic and meteorologic instrumentation was used, and streamflow characteristics were analyzed by standard hydrograph-analysis techniques. The stream is second-order, and drains an area of 0.70 square mile. Basin elevations are from 842 ft to 1618 ft. In regard to topography, geology, soils, permafrost, vegetation, and climate, the watershed seems to be representative of low-order, low-elevation drainage basins in the province. Analysis of rainfall-runoff data indicates that about half the 12.3-in. normal annual precipitation is runoff. The remainder is the actual evapotranspiration , which equals only about 30% of estimated potential evapotranspiration. For individual storms, runoff/rainfall proportions were from 0.03 to 0.42 and were positively correlated with antecedent discharge of the stream, which is a measure of watershed wetness. The stream responds rapidly to rainstorms except when the basin is very dry, and has markedly slow recessions compared with temperate region streams of similar size. Rate of recessions is apparentlv controlled by concurrent evapotranspiration rates. Analysis of hydrographs and knowledge of the physical characteristics of the basin indicate that storm runoff occurs initially as surface runoff from bare soil areas adjacent to the stream, while recessions are dominated by a combination of tunnel flow beneath moss-covered parts of the basins and typical groundwater flow through the moss and soils. Peak discharges for individual storms could be well estimated by an equation including antecedent discharge, total precipitation and storm duration, and average recession constant. These results represent the first detailed hydrologic data from the discontinuous permafrost zone of the North American taiga and should be of significance to the International Hydrological Decade and International Biological Program.
    Type of Medium: Series available for loan
    Pages: vi, 111 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 297
    Language: English
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  • 11
    Call number: ZSP-202-348
    In: Detecting structural heat losses with mobile infrared thermography, Part III
    In: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command, 348
    Description / Table of Contents: During the winter of 1973 - 74 a mobile infrared thermography system was used to survey the USA CRREL building at Hanover, New Hampshire. This report provides a description of excessive heat losses at several locations around the building. This report also discusses the need to carefully monitor meteorological conditions before starting a survey of a building exterior to determine if solar radiation decay from the building surface might interfere with thermographic analysis by masking the heat emanating from within the building.
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    Pages: ii, 9 S. : Ill.
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 348
    Language: English
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  • 12
    Call number: ZSP-202-344
    In: Research report
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Approach and methods. - Results. - Lake morphology. - Elongation. - Orientation. - Percentage cover (density). - Lake classification. - L1 unit. - L2 unit. - L3 unit. - L4 unit. - L5 and Lu units. - Other units. - Lake basin depths. - Ice volume and basin genesis. - Geological implications. - Conclusions. - Selected bibliography.
    Description / Table of Contents: The lakes of the Arctic Coastal Plain of northern Alaska were classified, based on size, shape, orientation and distribution, into six lake units and three nonlake units. Regional slope and relief were demonstrated to control lake size, the largest lakes occurring on the flattest, northernmost segment of the Coastal Plain. Using ERTS-1 sequential imagery and existing photography and data, lakes were grouped according to three depth ranges, 〈 1 m, 1-2 m and 〉 2 m. Deepest lakes have the longest period of summer ice cover. Ice on shallow lakes melts the earliest. Maximum depths of lakes were computed based on ice volume content of the perennially frozen ground (permafrost) and these agreed with observed values and ranges. The lake classification and regional ERTS-1 coverage also appear to provide additional information on the limits of late-Pleistocene transgressions on the Coastal Plain.
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    Pages: iv, 21 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 344
    Language: English
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  • 13
    Monograph available for loan
    Monograph available for loan
    Cambridge [u.a.] : Cambridge Univ. Press
    Call number: AWI S2-14-0042 ; M 15.0198
    Description / Table of Contents: This revised and updated edition focuses on constrained ordination (RDA, CCA), variation partitioning and the use of permutation tests of statistical hypotheses about multivariate data. Both classification and modern regression methods (GLM, GAM, loess) are reviewes and species functional traits and spatial structures are analysed. Nine case studies of varying difficulty help to illustrate the suggestes analytical methods, using the latest version of Canoco 5. All studies utilise descriptive and manipulative approaches, and are supported by data sets and project files available from the book website: http://regent.prf.jcu.cz/maed2/. Written primarily for community ecologists needing to analyse data resulting from field observations and experiments, this book is a valuable resource for students and researchers dealing with both simple and complex ecological problems, such as the variation of biotic communities with environmental conditions or their response to experimental manipulation.
    Type of Medium: Monograph available for loan
    Pages: XII, 362 S. : Ill., graph. Darst.
    Edition: 2. ed.
    ISBN: 9781107694408 , 1-107-69440-X
    Language: English
    Note: Contents: Preface. - 1 Introduction and datatypes. - 1.1 Why ordination?. - 1.2 Datatypes. - 1.3 Data transformation and standardisation. - 1.4 Missing values. - 1.5 Types of analyses. - 2 Using Canoco 5. - 2.1 Philosophy of Canoco 5. - 2.2 Data import and editing. - 2.3 Defining analyses. - 2.4 Visualising results. - 2.5 Beware, CANOCO 4.x users!. - 3 Experimental design. - 3.1 Completely randomised design. - 3.2 Randomised complete blocks. - 3.3 Latin square design. - 3.4 Pseudo replicates. - 3.5 Combining more than one factor. - 3.6 Following the development of objects in time: repeated observations. - 3.7 Experimental and observational data. - 4 Basics of gradient analysis. - 4.1 Techniques of gradient analysis. - 4.2 Models of response to gradients. - 4.3 Estimating species optima by weighted averaging. - 4.4 Calibration. - 4.5 Unconstrained ordination. - 4.6 Constrained ordination. - 4.7 Basic ordination techniques. - 4.8 Ordination axes as optimal predictors. - 4.9 Ordination diagrams. - 4.10 Two approaches. - 4.11 Testing significance of the relation with explanatory variables. - 4.12 Monte Carlo permutation tests for the significance of regression. - 4.13 Relating two biotic communities. - 4.14 Community composition as a cause: using reverse analysis. - 5.1 Permutation tests: the philosophy. - 5.2 Pseudo-F statistics and significance. - 5.3 Testing individual constrained axes. - 5.4 Tests with spatial or temporal constraints. - 5.5 Tests with hierarchical constraints. - 5.6 Simple versus conditional effects and stepwises election. - 5.7 Variation partitioning. - 5.8 Significance adjustment for multiple tests. - 6 Similarity measures and distance-based methods. - 6.1 Similarity measures for presence-absence data. - 6.2 Similarity measures for quantitative data. - 6.3 Similarity of cases versus similarity of communities. - 6.4 Similarity between species in trait values. - 6.5 Principal coordinates analysis. - 6.6 Constrained principal coordinates analysis (db-RDA). - 6.7 Non-metric multidimensional scaling. - 6.8 Mantel test. - 7.1 Example data set properties. - 7.2 Non-hierarchical classification (K-means clustering). - 7.3 Hierarchical classification. - 7.4 TWINSPAN. - 8 Regression methods. - 8.1 Regression models in general. - 8.2 General linear model: terms. - 8.3 Generalized linear models (GLM). - 8.4 Loess smoother. - 8.5 Generalized additive models (GAM). - 8.6 Mixed-effect models (LMM, GLMM and GAMM). - 8.7 Classification and regression trees (CART). - 8.8 Modelling species response curves with Canoco. - 9 Interpreting community composition with functional traits. - 9.1 Required data. - 9.2 Two approaches in traits - environment studies. - 9.3 Community-based approach. - 9.4 Species-based approach. - 10 Advanced use of ordination. - 10.1 Principal response curves (PRC). - 10.2 Separating spatial variation. - 10.3 Linear discriminant analysis. - 10.4 Hierarchical analysis of community variation. - 10.5 Partitioning diversity indices into alpha and beta components. - 10.6 Predicting community composition. - 11 Visualising multivariate data. - 11.1 Reading ordination diagrams of linear methods. - 11.2 Reading ordination diagrams of unimodal methods. - 11.3 Attribute plots. - 11.4 Visualising classification, groups, and sequences. - 11.5 T-value biplot. - 12 Case study 1: Variation in forest bird assemblages. - 12.1 Unconstrained ordination: portraying variation in bird community. - 12.2 Simple constrained ordination: the effect of altitude on bird community. - 12.3 Partial constrained ordination: additional effect of other habitat characteristics. - 12.4 Separating and testing alpha and beta diversity. - 13 Case study 2: Search for community composition patterns and their environmental correlates: vegetation of spring meadows. - 13.1 Unconstrained ordination. - 13.2 Constrained ordination. - 13.3 Classification. - 13.4 Suggestions for additional analyses. - 13.5 Comparing two communities. - 14 Case study 3: Separating the effects of explanatory variables. - 14.1 Introduction. - 14.2 Data. - 14.3 Changes in species richness and composition. - 14.4 Changes in species traits. - 15 Case study 4: Evaluation of experiments in randomised complete blocks. - 15.1 Introduction. - 15.2 Data. - 15.3 Analysis. - 15.4 Calculating ANOVA using constrained ordination. - 16 Case study 5: Analysis of repeated observations of species composition from a factorial experiment. - 16.1 Introduction. - 16.2 Experimental design. - 16.3 Data coding and use. - 16.4 Univariate analyses. - 16.5 Constrained ordinations. - 16.6 Principal response curves. - 16.7 Temporal changes across treatments. - 16.8 Changes in composition of functional traits. - 17 Case study 6: Hierarchical analysis of crayfish community variation. - 17.1 Data and design. - 17.2 Differences among sampling locations. - 17.3 Hierarchical decomposition of community variation. - 18 Case study 7: Analysis of taxonomic data with discriminant analysis and distance-based ordination. - 18.1 Data. - 18.2 Summarising morphological data with PCA. - 18.3 Linear discriminant analysis of morphological data. - 18.4 Principal coordinates analysis of AFLP data. - 18.5 Testing taxon differences in AFLP data using db-RDA. - 18.6 Taking populations into account. - 19 Case study 8: Separating effects of space and environment on oribatid community with PCNM. - 19.1 Ignoring the space. - 19.2 Detecting spatial trends. - 19.3 All-scale spatial variation of community and environment. - 19.4 Variation partitioning with spatial predictors. - 19.5 Visualising spatial variation. - 20 Case study 9: Performing linear regression with redundancy analysis. - 20.1 Data. - 20.2 Linear regression using program R. - 20.3 Linear regression with redundancy analysis. - 20.4 Fitting generalized linear models in Canoco. - Appendix A Glossary. - Appendix B Sample data sets and projects. - Appendix C Access to Canoco and overview of other software. - Appendix D Working with R. - References. - Index to useful tasks in Canoco 5. - Subject index.
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  • 14
    Call number: AWI G2-15-0023
    In: Coastal and estuarine studies, 40
    Type of Medium: Monograph available for loan
    Pages: XV, 647 S. : Ill., zahlr. graph. Darst., Kt.
    ISBN: 0875902545
    Series Statement: Coastal and estuarine studies 40
    Language: English
    Note: Contents: Acknowledgement. - Contributors List. - PART I. INTRODUCTION. - Introduction / D. Prandle. - PART II. BAROCLINIC DYNAMICS. - The influence of coastally trapped waves on the circulation in Jervis Bay, New South Wales / P. D. Craig and P. E. Holloway. - Tidal mixing near the sill of a Scottish sea loch / A. J. Elliott, P. A. Gillibrand and W. R. Turrell. - A topographically induced internal wave and mixing in the Tamar Estuary / D. R. Sturley and K. R. Dyer. - Turbulence and shear induced mixing processes in estuaries / E. J. Derbyshire & J. R. West. - Dynamically-active models in the prediction of estuarine stratification / J. H. Simpson and J. Sharples. - PART III. CIRCULATION. - Circulation Residual flow in Naples Bay and its effect on constituent concentration, constituent flux and residence time / J. Van de Kreeke. - The stratified hydrodynamics of the Palmiet - a prototypical bar-built estuary / J. L. Largier, J. H. Slinger and S. Talijaard. - Salinity structure of a shallow, tributary estuary / W. W. Schroeder, S. P. Dinnel and W. J. Wiseman Jr. - On meteorologically induced subtidal motion in Hangzhou Bay / J. L. Su and W. Chen. - Water level fluctuations in the Atchafalaya Delta, Louisiana: tidal forcing versus river forcing / E. M. Swenson and C. E. Sasser. - Modelling of low-frequency salinity variations in the St. Lawrence Estuary / K. T. Tee. - On the estuatine circulation within the Kattegat / N. Winkel-Steinberg, J. O. Backhaus and T. Pohlmann. - PART IV. SEDIMENTATION. - Sedimentation Observations of fine-sediment concentrations and transport in the turbidity maximum region of an estuary / R. J. Uncles, J. A. Stephens and M. L. Barton. - Velocity asymmetries in frictionally-dominated tidal embayments: longitudinal and lateral variability / C. T. Friedrichs, D. R. Lynch and D. G. Aubrey. - Effects of sea-level rise on muddy coastal margins / R. Kirby. - Acoustic measurements of suspended sediment over sandwaves / P. D. Thome, R. L. Soulsby and P. J. Hardcastle. - Some observations on fluid mud response to water waves / F. Jiang and A. J. Mehta. - The reflection of waves off beaches / J. Darbyshire. - PART V. MODELLING (SEDIMENT). - Dispersion in tidally-averaged transport equation / R. T. Cheng and V. Casulli. - Effect of bends on dilution rates / R. Smith. - Modelling the vertical distribution of suspended sediment in combined wave-current flow / A. G. Davies. - Some considerations on mathematical modelling of morphological processes in tidal regions / Z. B. Wang. - A three-dimensional transport model for dissolved and suspended matter in estuaries and coastal seas / G. C. van Dam and R. A. Louwersheimer. - An estuatine and coastal sand transport model / B. A. O'Connor and J. Nicholson. - PART VI. APPLIED STUDIES. - Current and density structure in the Netherlands coastal zone / W. P. M. de Ruijter, A. van der Giessen and F. C. Groenendijk. - On the distribution of suspended matter and the density driven circulation in the Dutch coastal area / M. Visser. - Coastal dynamics along a rugged coastline / B. King and E. Wolanski. - Transport of hypoxic waters: an estuary-subestuary exchange / A. Y. Kuo and K. Park. - Interdisciplinary study on the tidal front in the Bungo Channel, Japan / T. Yanagi, O. Matsuda, S. Tanabe and S. Uye. - Hydrodynamic modelling for a tidal power project / T. L. Shaw.
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  • 15
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-340
    In: Research report
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Nomenclature. - Introduction. - Theory. - Application. - Literature cited. - Appendix.
    Description / Table of Contents: The equations describing water movement in a dry snow cover are derived and examples of flow through ripe, refrozen and fresh snows are given. The grain size of snow has a large effect on the timing of water discharge. Water is retained by dry snow to raise its temperature and satisfy the irreducible water saturation. These requirements delay and reduce runoff following rain on dry snow.
    Type of Medium: Series available for loan
    Pages: iv, 13 S. : graph. Darst.
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 340
    Language: English
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  • 16
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-339
    In: Research report
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Analytical procedures. - Thick section analysis. - Measurements of inclusion pressure. - Gas volume measurements. - Density and porosity measurements. - Results and discussion. - Sizes, shapes and distributions of bubbles. - Sizes, shapes and distributions of cavities. - Inclusion abundances. - Gas pressures in bubbles and cavities. - Total gas content. - Case for lattice diffusion. - Literature cited.
    Description / Table of Contents: Cores obtained to the bottom of the Antarctic Ice Sheet at Byrd Station were used to analyze the physical properties of air bubbles trapped in the ice. These bubbles originate as pockets of air in the upper layers of snow and approximately 10 ml of air/100 cm^3 of ice; i.e., 10% by volume is retained permanently when the snow transforms into ice. Parameters measured were the sizes, shapes, abundances, spatial distributions, gas volumes and pressures of bubbles, and their variations with depth in the ice sheet. Bubbles occur abundantly in the top 800 m of ice but then gradually disappear until they can no longer be detected optically below 1100 m. This disappearance is not accompanied by any significant loss of air from the ice and all available evidence indicates that the air actually diffuses into the ice in response to increasing overburden pressure. The possibility exists that the dissolved gases are retained in the form of a gas hydrate or clathrate which, because of release of confining pressures, begins to decompose soon after ice cores are pulled to the surface. This decomposition is accompanied by the growth of gas-filled bubble-like cavities, and as much as 40% of the dissolved air has exsolved already from some cores in the space of less than three years. Bubble pressure measurements show that 1) bubbles with pressures exceeding about 16 bars begin to relax back to this value soon after in situ pressures are relieved by drilling, 2) further slow decompression occurs with time, and 3) the rate of decompression is controlled to some extent by the intrinsic structural properties of the ice and its thermal and deformational history. Only small variations were observed in the entrapped air content of the ice cores; they probably reflect variations in the temperature and/or pressure of the air at the time of its entrapment, but the data are not sufficient to draw any firm conclusions regarding past variations in ice sheet thickness. Only ice from the bottom 4.83 m was found to lack any detectable trace of air. Since this absence of air coincided precisely with the first appearance of stratified moraine in the cores, it is concluded that this ice originated from the refreezing of air-depleted water produced under pressure melting conditions at the bottom of the ice sheet.
    Type of Medium: Series available for loan
    Pages: v, 18 Seiten , Illlustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 339
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  • 17
    Call number: ZSP-202-337
    In: Research report
    Description / Table of Contents: Contents: Introduction. - Surface ice observations. - Imagery interpretation. - Side-looking airborne radar. - Infrared. - Conclusions. - Literature cited.
    Description / Table of Contents: Ice conditions during mid-January 1974 in the Gulf of St. Lawrence and in the estuaty as far upstream as Rimouski are described utilitizing side-looking airborne radar, infrared and photographic imagery. The interpretations were verified by simultaneous surface observations on the ice by investigators operating from the CSS Dawson. The ice examined was undergoing rapid drift and deformation and showed a wide variety of thin ice (0-40 cm) features formed under the influence of strong winds and currents. These observations should serve as a guide in interpreting ice conditions in similar areas where ground truth data are not available.
    Type of Medium: Series available for loan
    Pages: 41 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 337
    Language: English
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  • 18
    Call number: ZSP-202-338
    In: Detecting structural heat losses with mobile infrared thermography / R.H. Munis, S.J. Marshall and M.A. Bush, Part II
    In: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command, 338
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Discussion of heat loss survey of six housing units. - Survey of base facilities. - Conclusions. - Literature cited.
    Description / Table of Contents: During the winter of 1973-74 a mobile infrared thermography system was used to survey housing units and base facilities at Pease Air Force Base, Portsmouth, New Hampshire. This report provides both qualitative and quantitative evidence regarding heat flow out of the eave vents of these housing units. Calculations indicate that a significant amount of heat is being lost in this manner due to inadequate attic (cap) insulation. Possible evidence of incomplete ventilation could explain the presence of condensation in the housing units. Analyses of thermograms are presented to show the possible existence of low and high pressure areas around a structure and how they relate to heat loss.
    Type of Medium: Series available for loan
    Pages: iii, 29 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 338
    Language: English
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  • 19
    Call number: ZSP-202-331
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Introduction. - An overview of the model structure and operation. - Operation of subroutines. - TSTART. - FOMO. - REAWEA. - SEARCH. - STEMP. - TUNPIC. - Development history of the simulator. - The simulation of snow fence effects. - Urbanization and meltout. - Conclusion. - Literature cited. - Appendix A: Mathematical notation. - Appendix B: Computerprogram. - Abstract.
    Description / Table of Contents: An annual snow-soil simulator for Arctic tundra was developed using coupled models of surface equilibrium temperature and substrate thermal diffusion. Snow ripening, melt and accumulation are modeled in the simulator which is forced with daily weather data. The simulator predicts that a snow fence array capable of producing drift deeper than 4.2 meters will initiate a permanent snowfield at Barrow, Alaska. Such a man-induced snowfield could serve as a reliable source of fresh water for Barrow and similar villages in the North Slope region of Alaska. Further analysis indicated that albedo reduction due to dust fall, snow removal, etc., is dominant over aerodynamic effects in producing the early spring meltout observed at Barrow Village.
    Type of Medium: Series available for loan
    Pages: iv, 18 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 331
    Language: English
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  • 20
    Call number: ZSP-202-326
    In: Detecting structural heat losses with mobile infrared thermography / R.H. Munis, S.J. Marshall and M.A. Bush, Part I
    In: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command, 326
    Description / Table of Contents: CONTENTS: Preface. - Introduction. - Principle of the IR scanner. - Advantages of mobile infrared thermography. - Discussion of field measurements. - Recommendations for future work on thermography of buildings. - Other potential applications of infrared thermography of buildings. - Appendix A: Thermograms of northern exposure of USA CRREL building. - Appendix B: Sample thermograms of heat loss survey at Pease Air Force Base. -Appendix C: Sample thermograms of heat loss survey at Dartmouth College. - Abstract.
    Description / Table of Contents: A method to assess quickly the insulation effectiveness of buildings using mobile infrared thermography has been developed at USA CRREL. In contrast to the infrared thermography done in Sweden, this method concentrates on obtaining useful data by measuring the outside surface temperature of structures. This report outlines the basic principles involved in these measurements, and discusses field measurements and the inherent advantages of infrared thermography. Typical thermograms are presented in the appendixes.
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    Pages: iii, 13 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 326
    Language: English
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  • 21
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-271
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Previous work. - Conduct of the research. - Fundamental properties of snow. - Derived properties of snow. - Environmental effects. - Conclusions. - Literature cited. - Abstract.
    Description / Table of Contents: One of the great deficiencies in snow science is the lack of an analytical framework for much of the snow cycle. Snow research to date has largely consisted of measuring index properties of snow, such as bulk density and snow strength, and correlating them. This is useful, particularly for engineering purposes, but it does not grapple with the basic problem of what fundamental properties of snow determine the magnitude of the index properties and how these properties respond to environmental conditions. This study was an attempt to measure, quantitatively, the fundamental properties of grain size, shape, and fabric (relationship between grains) and relate these to the index or derived properties of bulk density, shear and tensile strength, permeability for air, and the dielectric static permittivity and loss tangent. Despite numerous difficulties in defining fabric and quantifying it, it was possible to show that: 1) snow strength is a function of bond area with a relationship in the low density range that is described by: [Sigma]f = [Sigma]i exp - (0.14nf) where [Sigma]f is failure strength, [Sigma]i is the final strength of ice, and nf is the porosity on the failure surface; and 2) the rate of densification of low density snow can be explained in part by high stress concentrations (on the order of 10^7 dynes /cm^2) at intergranular contacts and by such factors as riming on crystals. The effect of the environmental factors of time, temperature, and gravitational stress is difficult to study in situ because they are not independent variables. However, it appears that their study is simplified when we study the fundamental properties of snow as opposed to index properties.
    Type of Medium: Series available for loan
    Pages: v, 70 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 271
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  • 22
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-318
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Drilling and field observations. - Interpretation. - Implications for the feasibility study. - Conclusions. - Literature cited. - Abstract.
    Description / Table of Contents: Two holes were drilled through the Greenland ice sheet during 1973 and temperature measurements were made in one hole drilled during 1972. These measurements show that the area of liquid water beneath the ice cap extends to ice depths as shallow as 100 m. The consequences of removing the frozen margin of glacial ice could be serious and more temperature measurements are needed to exactly locate the subglacial water. Petrographic studies of a few ice cores revealed a strongly oriented crystal fabric and an appreciable surface accumulation of superimposed ice.
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    Pages: iii, 15 Seiten , Illustrationen, Karten
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 318
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  • 23
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-317
    In: Research report
    Description / Table of Contents: Experiments by Smith-Johannsen on the adhesion of ice frozen from a number of 1 x 10^-3 ? electrolyte solutions to a wax-treated aluminum surface at -10°C are discussed. It is concluded that the adhesive strength measured by the force per square centimeter needed to shear the ice off the substrate surface is mainly due to a liquid interfacial solution layer between the ice and the substrate surface. The thickness of such a layer is largely determined by the same considerations as the thickness of grain boundary layers in ice obtained from dilute electrolyte solutions.
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    Pages: ii, 9 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 317
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  • 24
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    Hanover, NH : U.S. Army Materiel Command, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-246
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Summary. - Introduction. - Theory. - Discussion. - Literature cited.
    Description / Table of Contents: Steady-state temperature profiles are calculated for the borehole drilled through the Greenland ice sheet at Camp Century. The profiles are found by modifying Robin's theory through the addition of several correction terms. One of these terms is the internal heating arising from creep deformation. The importance of this term was emphasized by Lliboutry. The new theoretical profiles do not differ appreciably from the profile derived from Robin's theory. The theoretical profiles do differ substantially from the Camp Century profile measured by Hansen. It is concluded that Hansen's observations are evidence that factors such as accumulation rate and the upper surface temperature are not in a long-term steady-state condition. Better agreement between theoretical and measured curves is obtained if it is assumed that the accumulation rate was about 40% smaller in the past and that the mean annual surface temperature varied by about 0.5°C over the past 1000 years.
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    Pages: iv, 13 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 246
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  • 25
    Call number: AWI G6-15-0043
    Description / Table of Contents: Cosmogenic radionuclides are radioactive isotopes which are produced by natural processes and distributed across the earth. Utilizing a holistic approach to the environment, the authors show how cosmogenic radionuclides can be used to trace and to reconstruct the history of a large variety of processes. They discuss the ways in which cosmogenic radionuclides can assist in the quantification of complex processes in the present-day environment. The book aims to demonstrate to the reader the strength of analytic tools based on cosmogenic radionuclides, their contribution to almost any field of modern natural science, and how these tools may assist in the solution of many present and future problems that we face here on earth. The book provides a comprehensive discussion of the basic principles behind the applications of cosmogenic (and other) radionuclides as environmental tracers and dating tools. Following the introduction, the second part of the book provides basic information on the origin, properties, and time variability of cosmic radiation, and the concepts, terminology and formulate that will be used in the later chapters. The third part discusses in detail the production of radionuclides by cosmic radiation, their transport and distribution in the atmosphere and the hydrosphere, their storage in natural archives, and how they are measured. The fourth part of the book presents a number of examples selected to illustrate typical tracer and dating applications in a number of different contexts (atmosphere, hydrosphere, geosphere, biosphere, solar physics and astronomy). At the same time the authors outline the limitations of the use of cosmogenic radionuclides. Written on a level accessible to graduate students without specialist skills in physics or mathematics, the book addresses a wide audience, ranging from archaeology, biophysics, and geophysics, to atmospheric physics, hydrology, astrophysics and space science.
    Type of Medium: Monograph available for loan
    Pages: XVI, 426 S. : Ill., graph. Darst.
    ISBN: 9783642146503
    Series Statement: Physics of earth and space environments
    Language: English
    Note: Contents: Part 1 Introduction. - 1 Motivation. - 2 Goals. - Reference. - 3 Setting the Stage and Outline. - Part 2 Cosmic Radiation. - 4 Introduction to Cosmic Radiation. - 5 The Cosmic Radiation Near Earth. - 5.1 Introduction and History of Cosmic Ray Research. - 5.2 The "Rosetta Stone" of Paleocosmic Ray Studies. - 5.3 Some Important Definitions. - 5.4 The Origin and Properties of the Galactic Cosmic Radiation. - 5.5 Our Variable Sun. - 5.6 The Heliosphere, the Termination Shock, and the Current Sheet. - 5.7 Modulation of the Cosmic Radiation in the Heliosphere. - 5.7.1 The Cosmic Ray Propagation Equation. - 5.7.2 The Local Interstellar Spectrum. - 5.7.3 The Cosmic Ray Modulation Function and Potential. - 5.7.4 Practical Applications of the Modulation Function. - 5.7.5 Drift Effects (qA Positive and qA Negative Effects). - 5.7.6 Shock Wave Effects (The Forbush Decrease and GMIRs). - 5.8 Geomagnetic Field Effects. - 5.8.1 The Properties of the Geomagnetic Field. - 5.8.2 The Geomagnetic Cut-off Rigidity. - 5.8.3 The Earth's Magnetosphere and the Polar Aurora. - References. - 6 Instrumental Measurements of the Cosmic Radiation. - 6.1 Introduction. - 6.2 Ionization Chambers and Muon Telescopes. - 6.3 The IGY and IQSY Neutron Monitors, and Spaceship Earth. - 6.4 Satellite Borne Detectors. - 6.5 Latitude Effects and the Yield Functions. - 6.6 Inter-calibration of the Different Cosmic Ray Records. - 6.7 Cosmic Ray Archives. - References. - 7 Time Variations of the Cosmic Radiation. - 7.1 Introduction and Atmospheric Effects. - 7.2 The Eleven-and Twenty-Two-Year Variations. - 7.3 The Long-term Variations. - 7.4 Forbush Decreases, Globally Merged Interaction Regions and Some Smaller Effects. - References. - 8 The Solar Cosmic Radiation. - 8.1 Historical Overview. - 8.2 The Observed Production of Cosmic Rays by the Sun. - 8.2.1Ground Level Events. - 8.2.2 SEP Events Observed by Satellites. - 8.2.3 Paleo-Cosmic Ray Measurements of SEP Events. - 8.3 Overall Characteristics of the Solar Cosmic Radiation. - 8.3.1 The Energy Spectra. - 8.3.2 The Effect of Longitude Relative to the Central Solar Meridian. - 8.3.3 The Frequency of Occurrence, and the Detection of Historic SEP Events. - References. - Part 3 Cosmogenic Radionuclides. - 9 Introduction to Cosmogenic Radionuclides. - 10 Production of Cosmogenic Radionuclides in the Atmosphere. - 10.1 Introduction. - 10.2 Interaction of Primary Cosmic Rays with the Atmosphere. - 10.2.1 Production of Secondary Particles. - 10.2.2 Ionization and Excitation Processes. - 10.2.3 Simulated Atmospheric Proton and Neutron Fluxes. - 10.3 Production of Cosmogenic Radionuclides in the Atmosphere. - 10.3.1 Early Production Models. - 10.3.2 Production Cross-Sections. - 10.3.3 Production Rates and Inventories. - 10.4 Production Results and Analytical Tools. - References. - 11 Production of Cosmogenic Radionuclides in Other Environmental Systems. - 11.1 Introduction. - 11.2 Terrestrial Solid Matter (Rocks, Ice). - 11.2.1 36Cl Production in Limestone and Dolomite. - 11.2.2 10Be and 14C Production in Ice. - 11.3 Extraterrestrial Solid Matter. - References. - 12 Alternative Production Mechanisms. - 12.1 Introduction. - 12.2 Natural Production Mechanisms. - 12.2.1 Cosmic Ray Induced Reactions. - 12.2.2 Radioactive Decay-Induced Reactions. - 12.3 Anthropogenic Production Mechanisms. - 12.3.1 Nuclear Power Plant and Nuclear Bomb-Induced Reactions. - 12.3.2 Research, Industrial, and Medical Induced Reactions. - References. - 13 Transport and Deposition. - 13.1 Introduction. - 13.2 Basics of the Atmosphere. - 13.3 Removal or Scavenging Processes. - 13.3.1 Wet Deposition. - 13.3.2 Dry Deposition. - 13.3.3 Gravitational Settling. - 13.3.4 The Big Picture. - 13.4 Modelling the Atmospheric Transport. - 13.4.1 Summary. - 13.5 Geochemical Cycles. - 13.5.1 Introduction. - 13.5.2 The Beryllium Cycle. - 13.5.3 Carbon Cycle. - 13.5.4 The Chlorine Cycle. - 13.5.5 The Iodine Cycle. - References. - 14 Archives. - 14.1 Introduction. - 14.2 Intrinsic Properties of the Cosmogenic Radionuclide Archives. - 14.3 Time Scales. - 14.4 Examples of Archives. - 14.5 Proxies and Surrogates. - 14.6 Properties of Data in the Cosmogenic Archives. - 14.6.1 Sampling Effects. - 14.6.2 Transfer Functions. - 14.7 Modelled Transfer Functions. - 14.7.1 10Be and 7Be in the Atmosphere. - 14.7.2 10Be and 26Al in Deep-Sea Sediments. - References. - 15 Detection. - 15.1 Introduction. - 15.2 Low-Level Decay Counting. - 15.3 Accelerator Mass Spectrometry. - 15.4 Decay Versus Atom Counting. - 15.5 Other Techniques, Optical Methods. - 15.5.1 Final Remarks. - References. - Part 4 Applications. - 16 Introduction to Applications. - 17 Solar Physics. - 17.1 Introduction. - 17.2 Solar Periodicities and the "Grand Minima" in the Cosmogenic Radionuclide Record. - 17.2.1 Solar Periodicities: Time Domain Studies. - 17.2.2 Solar Periodicities: Frequency Domain Studies. - 17.3 Cosmic Rayand Solar Effects in the Past. - 17.3.1 The Past Millennium. - 17.3.2 The Past 10,000 Years (the "Holocene"). - 17.3.3 The Long Solar Minimum of 2007-2009. - 17.4 The Heliomagnetic Field Throughout the Past 10,000 Years. - 17.5 Solar Irradiance and Terrestrial Climate. - 17.6 Radiation Doses on Earth and in Space in the Future. - 17.7 Quantitative Measures of Solar Activity for the Past. - 17.7.1 Reconstructed Sunspot Numbers. - 17.7.2 Modulation Function. - References. - 18 Galactic Astronomy. - 18.1 Introduction. - 18.2 Galactic Structure. - 18.3 Individual Supernova. - References. - 19 Atmosphere. - 19.1 Introduction. - 19.2 Studies of Atmospheric Mixing. - 19.3 36Cl Bomb Pulse as a Tracer of Atmospheric Transport. - 19.4 Concentrations and Fluxes. - References. - 20 Hydrosphere. - 20.1 Introduction. - 20.2 Tritium. - 20.3 Carbon-14. - 20.4 Krypton-81. - 20.5 Chlorine-36. - 20.6 Beryllium-7 to Beryllium-10 Ratio. - References. - 21 Geosphere. - 21.1 Introduction. - 21.2 Geomagnetic Field Intensity. - 21.3 Transport of Cosmogenic Radionuclides in Geological Systems. - 21.3.1 Introduction. - 21.3.2 Migration in Ice. - 21.3.3 Transport in Soils. - 21.3.4 Transport in Rocks. - 21.3.5 Formation of Loess Plateaus. - 21.3.6 Subduction. - References. - 22 Biosphere. - 22.1 Introduction. - 22.2 Radiocarbon Applications. - 22.3 Chlorine-36 in Ecosystems. - 22.4 Iodine-129. - 22.5 Aluminium-26. - References. - 23 Dating. - 23.1 Introduction. - 23.2 Absolute Dating. - 23.2.1 Principle of Radiocarbon Dating. - 23.2.2 Exposure Dating. - 23.2.3 10Be/36Cl- and 7Be/10Be-Dating. - 23.3 Synchronization of Records. - 23.3.1 10Be or 36Cl with 14C During the Holocene. - 23.3.2 The Use of Time Markers. - References. - Glossary. - Index.
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  • 26
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-289
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Materials and methods. - Materials. - Methods. - Results and discussion. - Literature cited. - Appendix A.
    Description / Table of Contents: Clay mineral and soil samples were subjected to neutron activation analysis in order to identify and measure the abundances of trace elements having radionuclides with long half-lives. After exposure of cadmium-shielded samples to neutrons for a period of five days, the gamma radiation associated with the decay of the resulting radionuclides was observed using a high resolution Ge(Li) detector. Trace elements identified without prior chemical separation using the gross gamma-ray spectra included Fe, Zn, Ti, Ni, Co, Cr, Sr, Ba, Ca, La, Eu, Tb, Hf, Ta, Th, and U. It should be possible to determine quantitatively the amount of each of these elements. This is a considerable improvement over the number of elements determined in soils previously by activation analysis without destructive chemical treatments.
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    Pages: iii, 27 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 289
    Language: English
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  • 27
    Call number: ZSP-292-288
    In: Research report
    Description / Table of Contents: Contents: Preface. - List of symbols. - Introduction. - Adsorption of volatile chemicals by soil. - Introduction. - Experimental procedure. - Results and discussion. - Diffusion of volatile chemicals in soil. - Introduction. - Experimental procedure. - Calculations. - Results and discussion. - Prediction of vapor diffusion in soil. - Introduction. - Construction of model. - Computations. - Results and discussion. - A statistical method for analysis of diffusion through soil. - Introduction. - Theory. - Application. - Literature cited. - Abstract.
    Description / Table of Contents: Detection of mines, explosives, and tunnels may be accomplished by sensing associated volatile effluvia. This investigation was undertaken to provide a basis for predicting the diffusion of volatile compounds from underground sources into the atmosphere. Diffusion of a volatile compound was studied for a range of soil conditions utilizing soils from the mine detection sites in Puerto Rico. A new mathematical analysis based on the Monte Carlo method was developed for predicting vapor diffusion through soil into the atmosphere. It was determined that diffusion in soil can be reliably predicted if soil porosity, moisture content, and affinity for the compound are known. Appearance in the atmosphere is also dependent on accumulation of the compound in air at the soil/atmosphere interface. Diffusion of volatile compounds through soil into the atmosphere is not likely to be an important factor in tunnel detection due to depth of overburden. However, adsorption of compounds at tunnel walls is likely to significantly reduce the amount of vapor appearing in the atmosphere through entrances and vents. Detection in the atmosphere of TNT vapor from mines and explosives buried in moist, porous soil should be possible under ideal sample collection conditions.
    Type of Medium: Series available for loan
    Pages: v, 43 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 288
    Language: English
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  • 28
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-281
    In: Research report
    Description / Table of Contents: The solution for the vibration of an elastic plate floating on water is developed. The water is assumed to be incompressible and to have irrotational flow. In free vibration upon release of the plate, the maximum negative rebound of the deflection is 25%. For forced vibration, the steady state part of the solution shows that there is a frequency at which the deflection is a maximum. The stresses become a maximum at a frequency higher than the one for deflection. These critical frequencies depend upon the plate's characteristic length and the depth of the water. For most situations the critical frequency for stress is less than 0.2 cycle per second. At this critical frequency the stresses are amplified over the static case by a factor less than 10%.
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    Pages: ii, 9 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 281
    Language: English
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  • 29
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-242
    In: Research report, 242
    Description / Table of Contents: The attenuation of visible light by falling snow was studied by making simultaneous attenuation measurements and snow concentration measurements. The attenuation coefficient was calculated from photometric measurements and from visual observations. Snow concentration in the air was evaluated by two methods: from Formvar replicas collected during the snowfall, and by mass accumulation of snow in collecting pans. The snowflakes were arbitrarily classified by crystal types according to their estimated fall velocity. It was found that the correlation between extinction coefficient (attenuation) and snow concentration was generally much higher by types than when all snowflakes were considered together regardless of crystal components and degree of riming. Two types, apparently improperly classified, displayed lower correlations than the overall group. When no fog is present during the snowfall, the experimental results coincide well with attenuation theory if a reasonable correction is applied to the values obtained in the measurement of snowflake diameters. Measurements of mass flux indicate that for a given intensity the attenuation caused by snow is an order of magnitude greater than that caused by the same mass flux of rain.
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    Pages: iv, 27 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 242
    Language: English
    Note: CONTENTS: Preface. - Abstract. - Introduction. - Initial theoretical considerations. - Light attenuation by particles. - Basis of attenuation meter measurements. - Contrast reduction and visual range. - Transmissometer theory, Pritchard photometric method. - Terminal velocity of snowflakes. - Methods of measurement: Light attenuation. - Duntley (Scripps Institution) attenuation meter. - "Meteorological range" observations. - Pritchard photometric method. - Methods of measurement: Atmospheric concentration of snowflakes. - Replication method. - Mass accumulation method. - Analysis of snow samples. - Terminal velocity of snowflakes. - Flux density and atmospheric concentration. - Mass accumulation rate. - Concurrent attenuation due to fog. - Discussion of results. - Computational methods. - Correlations: Attenuation coefficient vs area concentration. - Correlations: Attenuation coefficient vs are a flux. - Correlations: Attenuation coefficient vs mass concentration and mass flux. - Comparison of sampling methods for mass flux. - Attenuation of visible light by snow compared to rain. - Literature cited. - Appendix A.
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  • 30
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    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-259
    In: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command, 259
    Description / Table of Contents: CONTENTS: Preface. - Introduction. - Previous work. - Study area. - Field procedures. - Results and discussion. - Conclusions. - Literature cited. - Abstract.
    Description / Table of Contents: A modern ice-push ridge on the northwest shore of Gardner Lake in southeastern Connecticut is 0.6 - 1.2 m high and 1.2 - 3.1 m wide. In February and March 1967, the positions of survey stakes placed on the lake ice were measured periodically. During the same period, air and ice temperature and solar radiation intensity were also recorded. Analysis of the data supports the hypothesis that thermal expansion of the lake ice rather than wind action, was the principal cause of ice push. An ice temperature change of approximately 1°C/hr increase for 6 hr was sufficient to induce ice thrust. In a 30-day period, the average net shoreward movement of the surveyed area of the ice surface was 1.0 m. During the 1966-67 winter, approximately 14 m^3 of beach material was reworked and deposited, forming a discontinuous ice-push ridge along 260 m of shoreline.
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    Pages: iii, 15 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 259
    Language: English
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  • 31
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-255
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Previous work on unsteady rectilinear motion of a sphere. - Experiments with a circular path. - Conclusion. - Literature cited. - Appendix A: Comparisons of the measured and calculated forces.
    Description / Table of Contents: Forces on a sphere moving unsteadily along a circular path in a viscous fluid are measured, and it is found that within the experimental range the formula valid for rectilinear motion has to be modified to account for the curvature of the path.
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    Pages: iv, 10 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 255
    Language: English
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  • 32
    Call number: ZSP-387-8
    In: International project on paleolimnology and late cenozoic climate
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    Pages: 128 S.
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  • 33
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    Hanover, NH : U.S. Army Corps of Engineers, Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-250
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Methods. - Results. - Ground and aerial photography. - Hemispherical photography. - Light quality. - Discussion. - Literature cited. - Abstract.
    Description / Table of Contents: Aerial and ground photographs were taken over a 2-year period of sites in the El Verde rain forest to record the consistency of the vegetational patterns in untreated sites and the changes that occurred following gamma irradiation. Four emulsions were used: panchromatic infrared, false color transparency and color transparency. Densitometry was used to evaluate color film and the vegetation response to 3 months of radiation. The color emulsions provided the sharpest indication of damage to vegetation and the succession following treatment. Hemispherical photography of the canopy was evaluated in terms of a canopy cover index defined as percent of light passing through the negative in a 90-degree cone area. Control stations were remarkably constant in all photography, establishing the stability and slow natural changes in rain forest structure. Spectral light measurements within the forest confirmed the predominance of far red shade light. Compared to similar studies on the chronic irradiated forest at Brookhaven National Laboratory the El Verde results were less distinct.
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    Pages: iii, 21 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 250
    Language: English
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  • 34
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-249
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Analytical procedures. - Results and discussion. - Bubbles in ice. - Conclusions. - Literature cited.
    Description / Table of Contents: Application of the gas law to fourth-place density measurements of ice samples from two deep drill holes at Byrd Station and Little America V, Antarctica, shows that virtually all density increase beyond the pore close-off density (0.830 g/cm^3) can be attributed to compression of the entrapped bubbles of air. Data from Byrd Station also indicate that the lag between overburden pressure and bubble pressure, initially 4-5 kg/cm^2 at pore close-off, diminishes to less than 1.0 kg/cm^2 at about 200-m depth. By substituting the overburden pressure for the bubble pressure in the pressure-density relationship based on the gas law, ice densities below 200 m can be calculated more accurately than they can be measured per se on cores because of the relaxation that occurs in samples recovered from high confining pressures. This relaxation, resulting in a progressive increase in the bulk volume of the ice with time, is generally attributed to decompression of the entrapped air bubbles following removal of the ice from high confining pressures. However, calculations of the stress in ice due to bubble pressure, together with measurements of bubble sizes in cores from various depths at Byrd Station, both tend to indicate that there has'been negligible decompression of the inclosed bubbles. It is suggested that most of this relaxation may be due to the formation of microcracks in the ice. Anomalous bubble pressure-density relations at Little America V tend to confirm abundant stratigraphic evidence of the existence of considerable deformation in the upper part of the Ross Ice Shelf. Studies of crystal-bubble relations at Byrd Station revealed that the concentration of bubbles in ice remains remarkably constant at approximately 220 bubbles per cm^3. Bubbles and crystals were found to be present in approximately equal numbers at pore close-off at 64-m depth, at which level the average bubble diameter was 0.95 mm, decreasing to 0.49 mm at 116 m and to 0.33 mm at 279 m. Despite a tenfold increase in the size of crystals between 64 and 279 m, the bubbles showed no tendency to migrate to grain boundaries during recrystallization of the ice. The observation that most of the bubbles had assumed substantially spherical shapes by 120-m depth points to essentially hydrostatic conditions in the upper layers of the ice sheet at Byrd Station.
    Type of Medium: Series available for loan
    Pages: iv, 16 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 249
    Language: English
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  • 35
    Series available for loan
    Series available for loan
    Silver Spring, MD : U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service
    Associated volumes
    Call number: ZSP-582-59
    In: NOAA atlas NESDIS
    In: International ocean atlas and information series
    Description / Table of Contents: This Atlas and accompanying CD-ROM contains oceanographic data collected by the scientific specialists of the Academy of Sciences, Ministery of Fisheries, and the Hydrometeorological Service of Russia in the Sea of Azov and the adjacent part of the Black Sea during 1913 - 2004. Monthly data distribution plots are provided for each year. Monthly climatic maps of temperature and salinity at the sea surface and depth levels of 5 and 10 meters are computed using opjective analysis. Intra-annual variability of temperature and salinity of the Sea of Azov is discussed with respect to the quality control of the primary data. The Atlas also includes, in electronic format, selected copies of rare books and articles about the history of the Sea of Azov exploration and climate studies as well as photos, which provide information about the people and environment of this region.
    Type of Medium: Series available for loan
    Pages: 105 S. : graph. Darst., Kt. + 1 CD-ROM
    Series Statement: NOAA atlas NESDIS 59
    Language: English
    Note: Text. engl. und russ. - Teilw. in kyrill. Schr.
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  • 36
    Monograph available for loan
    Monograph available for loan
    Cambridge : Cambridge University Press
    Call number: AWI A5-12-0038
    Description / Table of Contents: Murry Salby's new book provides an integrated treatment of the processes controlling the Earth-atmosphere system developed from first principles through a balance of theory and applications. This book builds on Salby's previous book Fundamentals of Atmospheric Physics. The scope has been expanded to include climate, while streamlining the presentation for undergraduates in scinece, mathematics, and engineering. Advanced material, suitable for graduate students and researchers, has been retained but distingushed from the basic development. The book offers a conceptual yet quantitative understanding of the controlling influences integrated through theory and major applications. It leads readers through a methodical development of the diverse physical processes that shape weather, global energetics, and climate. End-of-chapter problems of varying difficulty develop student knowledge and ist quanitative application, supported by answers and detailed solutions online for instructors.
    Type of Medium: Monograph available for loan
    Pages: XIX, 666 Seiten , Illustrationen
    Edition: First published 2012, 2nd edition
    ISBN: 9780521767187 , 978-0-521-76718-7
    Language: English
    Note: Contents Preface Prelude 1 The Earth-atmosphere system 1.1 Introduction 1.1.1 Descriptions of atmospheric behavior 1.1.2 Mechanisms influencing atmospheric behavior 1.2 Composition and structure 1.2.1 Description of air 1.2.2 Stratification of mass 1.2.3 Thermal and dynamical structure 1.2.4 Trace constituents 1.2.5 Cloud 1.3 Radiative equilibrium of the Earth 1.4 The global energy budget 1.4.1 Global-mean energy balance 1.4.2 Horizontal distribution of radiative transfer 1.5 The general circulation 1.6 Historical perspective: Global-mean temperature 1.6.1 The instrumental record 1.6.2 Proxy records Suggested references Problems 2 Thermodynamics of gases 2.1 Thermodynamic concepts 2.1.1 Thermodynamic properties 2.1.2 Expansion work 2.1.3 Heat transfer 2.1.4 State variables and thermodynamic processes 2.2 The First Law 2.2.1 Internal energy 2.2.2 Diabatic changes of state 2.3 Heat capacity 2.4 Adiabatic processes 2.4.1 Potential temperature 2.4.2 Thermodynamic behavior accompanying vertical motion 2.5 Diabatic processes 2.5.1 Polytropic processes Suggested references Problems 3 The Second Law and its implications 3.1 Natural and reversible processes 3.1.1 The Carnot cycle 3.2 Entropy and the Second Law 3.3 Restricted forms of the Second Law 3.4 The fundamental relations 3.4.1 The Maxwell Relations 3.4.2 Noncompensated heat transfer 3.5 Conditions for thermodynamic equilibrium 3.6 Relationship of entropy to potential temperature 3.6.1 Implications for vertical motion Suggested references Problems 4 Heterogeneous systems 4.1 Description of a heterogeneous system 4.2 Chemical equilibrium 4.3 Fundamental relations for a mufti-component system 4.4 Thermodynamic degrees of freedom 4.5 Thermodynamic characteristics of water 4.6 Equilibrium phase transformations 4.6.1 Latent heat 4.6.2 Clausius-Clapeyron Equation Suggested references Problems 5 Transformations of moist air 5.1 Description of moist air 5.1.1 Properties of the gas phase 5.1.2 Saturation properties 5.2 Implications for the distribution of water vapor 5.3 State variables of the two-component system 5.3.1 Unsaturated behavior 5.3.2 Saturated behavior 5.4 Thermodynamic behavior accompanying vertical motion 5.4.1 Condensation and the release of latent heat 5.4.2 The pseudo-adiabatic process 5.4.3 The Saturated Adiabatic Lapse Rate 5.5 The pseudo-adiabatic chart Suggested references Problems 6 Hydrostatic equilibrium 6.1 Effective gravity 6.2 Geopotential coordinates 6.3 Hydrostatic balance 6.3.1 Hypsometric equation 6.3.2 Meteorological Analyses 6.4 Stratification 6.4.1 Idealized stratification 6.5 Lagrangian interpretation of stratification 6.5.1 Adiabatic stratification: A paradigm of the troposphere 6.5.2 Diabatic stratification: A paradigm of the stratosphere Suggested references Problems 7 Static stability 7.1 Reaction to vertical displacement 7.2 Stability categories 7.2.1 Stability in terms of temperature 7.2.2 Stability in terms of potential temperature 7.2.3 Moisture dependence 7.3 Implications for vertical motion 7.4 Finite displacements 7.4.1 Conditional instability 7.4.2 Entrainment 7.4.3 Potential instability 7.4.4 Modification of stability under unsaturated conditions 7.5 Stabilizing and destabilizing influences 7.6 Turbulent dispersion 7.6.1 Convective mixing 7.6.2 Inversions 7.6.3 Life cycle of the nocturnal inversion 7.7 Relationship to observed thermal structure Suggested references Problems 8 Radiative transfer 8.1 Shortwave and longwave radiation 8.1.1 Spectra of observed SW and LW radiation 8.2 Description of radiative transfer 8.2.1 Radiometric quantities 8.2.2 Absorption 8.2.3 Emission 8.2.4 Scattering 8.2.5 The Equation of Radiative Transfer 8.3 Absorption characteristics of gases 8.3.1 Interaction between radiation and molecules 8.3.2 Line broadening 8.4 Radiative transfer in a plane parallel atmosphere 8.4.1 Transmission function 8.4.2 Two-stream approximation 8.5 Thermal equilibrium 8.5.1 Radiative equilibrium in a gray atmosphere 8.5.2 Radiative-convective equilibrium 8.5.3 Radiative heating 8.6 Thermal relaxation 8.7 The greenhouse effect 8.7.1 Feedback in the climate system 8.7.2 Unchecked feedback 8.7.3 Simulation of climate Suggested references Problems 9 Aerosol and cloud 9.1 Morphology of atmospheric aerosol 9.1.1 Continental aerosol 9.1.2 Marine aerosol 9.1.3 Stratospheric aerosol 9.2 Microphysics of cloud 9.2.1 Droplet growth by condensation 9.2.2 Droplet growth by collision 9.2.3 Growth of ice particles 9.3 Macroscopic characteristics of cloud 9.3.1 Formation and classification of cloud 9.3.2 Microphysical properties of cloud 9.3.3 Cloud dissipation 9.3.4 Cumulus detrainment: Influence on the environment 9.4 Radiative transfer in aerosol and cloud 9.4.1 Scattering by molecules and particles 9.4.2 Radiative transfer in a cloudy atmosphere 9.5 Roles of cloud and aerosol in climate 9.5.1 Involvement in the global energy budget 9.5.2 Involvement in chemical processes Suggested references Problems 10 Atmospheric motion 10.1 Description of atmospheric motion 10.2 Kinematics of fluid motion 10.3 The material derivative 10.4 Reynolds'transport theorem 10.5 Conservation of mass 10.6 The momentum budget 10.6.1 Cauchy's Equations of Motion 10.6.2 Momentum equations in a rotating reference frame 1 0.7 The first law of thermodynamics Suggested references Problems 11 Atmospheric equations of motion 11.1 Curvilinear coordinates 11.2 Spherical coordinates 11.2.1 The traditional approximation 11.3 Special forms of motion 11.4 Prevailing balances 11.4.1 Motion-related stratification 11.4.2 Scale analysis 11.5 Thermodynamic coordinates 11.5.1 Isobaric coordinates 11.5.2 Log-pressure coordinates 11.5.3 Isentropic coordinates Suggested references Problems 12 Large-scale motion 12.1 Ceostrophic equilibrium 12.1.1 Motion on an f plane 1 2.2 Vertical shear of the geostrophic wind 12.2.1 Classes of stratification 12.2.2 Thermal wind balance 12.3 Frictional geostrophic motion 1 2.4 Curvilinear motion 12.4.1 Inertial motion 12.4.2 Cyclostrophic motion 12.4.3 Gradient motion 12.5 Weakly divergent motion 12.5.1 Barotropic nondivergent motion 12.5.2 Vorticity budget under baroclinic stratification 12.5.3 Quasi-geostrophic motion Suggested references Problems 13 The planetary boundary layer 13.1 Description of turbulence 13.1.1 Reynolds decomposition 13.1.2 Turbulent diffusion 13.2 Structure of the boundary layer 13.2.1 The Ekman Layer 13.2.2 The surface layer 1 3.3 Influence of stratification 1 3.4 Ekman pumping Suggested references Problems 14 Wave propagation 14.1 Description of wave propagation 14.1.1 Surface water waves 14.1.2 Fourier synthesis 14.1.3 Limiting behavior 14.1.4 Wave dispersion 14.2 Acoustic waves 14.3 Buoyancy waves 14.3.1 Shortwave limit 14.3.2 Propagation of gravity waves in an inhomogeneous medium 14.3.3 The WKB approximation 14.3.4 Method of geometric optics 1 4.4 The Lamb wave 14.5 Rossby waves 14.5.1 Barotropic nondivergent Rossby waves 14.5.2 Rossby wave propagation in three dimensions 14.5.3 Planetary wave propagation in sheared mean flow 14.5.4 Transmission of planetary wave activity 14.6 Wave absorption 14.7 Nonlinear considerations Suggested references Problems 15 The general circulation 15.1 Forms of atmospheric energy 15.1.1 Moist static energy 15.1.2 Total potential energy 15.1.3 Available potential energy 1 5.2 Heat transfer in a zonally symmetric circulation 1 5.3 Heat transfer in a laboratory analogue 1 5.4 Quasi-permanent features 15.4.1 Thermal properties of the Earth's surface 1 5.4.2 Surface pressure and wind systems 1 5.4.3 Tropical circulations 15.5 Fluctuations of the circulation 15.5.1 Interannual changes 15.5.2 Intraseasonal variations Suggested references Problems 16 Dynamic stability 16.1 Inertial instability 16.2 Shear instability 16.2.1 Necessary conditions for instability 16.2.2
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  • 37
    Monograph available for loan
    Monograph available for loan
    Sankt-Peterburg : Sankt-Peterburgskij Gosudarstvennyj Universitet
    Call number: AWI Bio-13-0030
    Description / Table of Contents: Atlas contains photographic images of 91 plant species and pollen which are found in Lena River Delta as well as information about current conditions of their growth. This is a major advantage of this atlas as compared to other publications of this kind. All information is presented in Russian and English. All materials were collected in framework of the Russian-German expeditions "Lena-2009", "Lena-2010", "Lena-2011" and "Lena-2012". Photographs illustrate the general view of the plant, inflorescence and pollen grains in different positions and from high to low focus. Plants are grouped into families, where each family has its own color. Atlas is addressed not only to specialists in palynology, but to all who are interested in the flora and vegetation of the Arctic region, including students of geographical, biological and environmental fields.
    Type of Medium: Monograph available for loan
    Pages: 111 Seiten , Illustrationen
    ISBN: 9785439100361
    Language: Russian , English
    Note: Contents: Introduction. - Apiaceae. - Asteraceae. - Betulaceae. - Boraginaceae. - Brassicaceae. - Campanulaceae. - Caryophyllaceae. - Crassulaceae. - Cyperaceae. - Diapensiaceae. - Ericaceae. - Fabaceae. - Gentianaceae. - Hippuriadaceae. - Juncaceae. - Lentibulariaceae. - Liliaceae. - Onagraceae. - Papaveraceae. - Parnassiaceae. - Pinaceae. - Plumbaginaceae. - Poaceae. - Polemoniaceae. - Polygonaceae. - Portulacaceae. - Primulaceae. - Pyrolaceae. - Ranunculaceae. - Rosaceae. - Salicaceae. - Saxifragaceae. - Scrophulariaceae. - Valerianaceae. - Index of plants by family. - Alphabetical index of plants. , In englischer und russischer Sprache. , Teilw. in kyrillischer Schrift
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  • 38
    Monograph available for loan
    Monograph available for loan
    Berlin : Springer
    Call number: AWI G3-13-0054
    Description / Table of Contents: Permafrost hydrology systematically elucidates the roles of seasonally and perennially frozen ground on the distribution, storage and flow of water. Cold regions of the world are subject to mounting development which significantly affects the physical environment. Climate change, natural or human-induced, reinforces the impacts. Knowledge of surface and ground water processes operating in permafrost terrain is fundamental to planning, management and conservation. This book is an indispensable reference for libraries and researchers, an information source for practitioners, and a valuable text for training the next generations of cold region scientists and engineers.
    Type of Medium: Monograph available for loan
    Pages: XII, 563 Seiten , Illustrationen, Diagramme, Karten (teilweise farbig)
    ISBN: 9783642234613
    Language: English
    Note: Contents: 1 Introduction. - 1.1 The world cold regions. - 1.2 Water in frozen soils. - 1.3 Permafrost. - 1.3.1 Definitions. - 1.3.2. Distribution. - 1.3.3. Factors influencing permafrost occurence. - 1.4 Permafrost and hydrology. - 1.4.1 Permafrost hydrology. - 1.4.2 Hydrologic behavior of seasonal frost and permafrost. - 1.5 Environments of permafrost regions. - 1.5.1 Hydroclimatology. - 1.5.2 Geology. - 1.5.3 Glaciation. - 1.5.4 Physiography. - 1.5.5 Vegetation. - 1.5.6 Peat cover. - 1.6 Presentation of the book. - 2 Moisture and heat. - 2.1 Precipitation. - 2.1.1 General pattern. - 2.1.2 Cyclones. - 2.1.3 Recycling. - 2.1.4 Trace precipitation. - 2.2 Surface energy balance. - 2.3 Evaporation. - 2.3.1 Eddy Fluctuation Method. - 2.3.2 Aerodynamic method. - 2.3.3 Bowen Ratio Method. - 2.3.4 Priestley and Taylor Method. - 2.4 Energy balance of the active layer. - 2.4.1 Energy Balance. - 2.4.2 Thermal conductivity and heat capacity. - 2.5 Ground temperature. - 2.5.1 Penetration of temperature waves. - 2.5.2 Frost table development. - 2.6 Heat and moisture flows in frozen soils. - 2.6.1 Stefan's Algorithm. - 2.6.2 Near-Surface ground temperature. - 2.6.3 Moisture migration and ice lens formation. - 2.7 Ground ice. - 2.7.1 Types of ground ice. - 2.7.2 Excess ice. - 3 Groundwater. - 3.1 Groundwater occurence in permafrost. - 3.1.1 Suprapermafrost groundwater. - 3.1.2 Intrapermafrost groundwater. - 3.1.3 Subpermafrost groundwater. - 3.2 Groundwater recharge and circulation. - 3.2.1 Recharge. - 3.2.2 Groundwater movement. - 3.3 Groundwater discharge. - 3.3.1 Seeps. - 3.3.2 Springs. - 3.3.3 Baseflow. - 3.3.4 Ponds and lakes. - 3.4 Icings. - 3.4.1 Ground and spring icings. - 3.4.2 River icings. - 3.4.3 Icing dimension. - 3.4.4 Icing problems. - 3.5 Domed ice features. - 3.5.1 Frost mounds and icing mounds. - 3.5.2 Pingos. - References. - 4 Snow cover. - 4.1 Snow accumulation. - 4.1.1 Winter precipitation. - 4.1.2 Blowing snow. - 4.1.3 Terrain heterogeneity. - 4.1.4 Vegetation cover. - 4.2 Characteristics of the snow cover. - 4.2.1 Snow temperature and insulation. - 4.2.2 Snow metamorphism. - 4.2.3 Snow stratigraphy. - 4.3 Snowmelt processes. - 4.3.1 Radiation melt. - 4.3.2 Turbulent fluxes melt. - 4.3.3 Other melt terms. - 4.4 Snowmelt in permafrost areas. - 4.4.1 Tundra and Barren areas. - 4.4.2 Dirty snow. - 4.4.3 Shrub fields. - 4.4.4 Forests. - 4.5 Meltwater movement in snow. - 4.5.1 Dry snow. - 4.5.2 Wet snow. - References. - 5 Active layer dynamics. - 5.1 Freeze-back and winter periods. - 5.1.1 Snow cover and ground freezing. - 5.1.2 Moisture flux and ice formation. - 5.1.3 Vapor flux from soil to snow. - 5.2 Snowmelt period. - 5.2.1 Snowmelt and basal ice. - 5.2.2 Infiltration into frozen soil. - 5.2.3 Soil warming. - 5.2.4 Surface saturation, evaporation and runoff. - 5.3 Summer. - 5.3.1 Active layer thaw. - 5.3.2 Summer precipitation. - 5.3.3 Evaporation. - 5.3.4 Rainwater infiltration. - 5.3.5 Soil moisture. - 5.3.6 Groundwater. - References. - 6 Slope processes. - 6.1 Flow paths. - 6.1.1 Flow paths in snow. - 6.1.2 Surface and subsurface flows. - 6.1.3 Flow in bedrock areas. - 6.1.4 Flow in unconsolidated materials. - 6.2 Water sources. - 6.3 Factors influencing slope runoff generation. - 6.3.1 Microclimatic control. - 6.3.2 Topographic influence. - 6.3.3 Importance of the Frost table. - 6.3.4 Roles of organic materials. - 6.3.5 Bedrock control. - 6.4 Basin slopes in permafrost regions. - 6.4.1 High Arctic slopes. - 6.4.2 Low Arctic slopes. - 6.4.3 Subarctic slopes. - 6.4.4 Alpine permafrost zones. - 6.4.5 Precambrian bedrock terrain. - 6.5 Concepts for basin flow generation. - 6.5.1 Variable source area and fill-and-spill concepts. - 6.5.2 Heterogenous slopes. - References. - 7 Cold lakes. - 7.1 Types of lake. - 7.2 Lake ice. - 7.2.1 Lake ice regime. - 7.2.2 Ice formation and growth. - 7.2.3 Ice decay. - 7.3 Lake circulation. - 7.4 Hydrologic inputs. - 7.5 Lake evaporation. - 7.6 Lake outflow. - 7.6.1 Outflow conditions. - 7.6.2 Fill-and-Spill concept and lake outflow. - 7.7 Lake level. - 7.8 Large lakes. - 7.9 Permafrost and lakes. - References. - 8 Northern wetlands. - 8.1 Wetlands in permafrost regions. - 8.2 Factors favoring wetland occurence. - 8.2.1 Climate. - 8.2.2 Topography. - 8.2.3 Stratigraphy. - 8.2.4 Other factors. - 8.3 Hydrogeomorphic features in wetlands. - 8.3.1 Bog-related features. - 8.3.2 Fen-related features. - 8.3.3 Marshes and swamps. - 8.3.4 Shallow water bodies. - 8.4 Hydrologic behavior of wetlands. - 8.4.1 Seasonality of hydrologic activities. - 8.4.2 Wetland storage. - 8.4.3 Flow paths. - 8.4.4 Application of Fill-and-Spill concept. - 8.5 Patchy arctic wetlands. - 8.5.1 Wetlands maintained by snowmelt. - 8.5.2 Groundwater-fed wetlands. - 8.5.3 Valley bottom fens. - 8.5.4 Wetlands due to lateral inundation. - 8.5.5 Tundra ponds. - 8.5.6 Lake-fed and lake-bed wetlands. - 8.6 Extensive wetlands. - 8.6.1 Wet terrain. - 8.6.2 Ice-wedge polygon fields. - 8.6.3 Coastal plains. - 8.6.4 Deltas. - 8.6.5 Subarctic continental wetlands. - 8.7 Wetlands, permafrost and disturbances. - References. - 9 Rivers in cold regions. - 9.1 Drainage patterns. - 9.2 In-valley conditions. - 9.2.1 Geological setting for channels. - 9.2.2 River ice. - 9.2.3 River icing. - 9.2.4 In-channel snow. - 9.2.5 Permafrost. - 9.2.6 Alluvial environment. - 9.3 In-channel hydrology. - 9.3.1 Lateral inflow. - 9.3.2 Channel inflow. - 9.3.3 Vertical water exchanges. - 9.3.4 Storage in channels. - 9.4 Flow connectivity and delivery. - 9.4.1 Flow network integration. - 9.4.2 Decoupling of flow network. - 9.4.3 Flow delivery. - References. - 10 Basin hydrology. - 10.1 Basin outflow generation. - 10.1.1 The roles of snow. - 10.1.2 Meltwater from glaciers. - 10.1.3 Rainfall contribution. - 10.1.4 Groundwater supply. - 10.1.5 Evaporation losses. - 10.1.6 Permafrost effects. - 10.1.7 Consequences of basin storage. - 10.2 Streamflow hydrograph. - 10.3 Streamflow regimes. - 10.3.1 Nival regime. - 10.3.2 Proglacial regime. - 10.3.3 Pluvial regime. - 10.3.4 Spring-fed Regime. - 10.3.5 Prolacustrine regime. - 10.3.6 Wetland regime. - 10.4 Streamflow in large basins. - 10.4.1 Scaling up to large rivers. - 10.4.2 Flow generation in a large basin: the Liard river. - 10.4.3 Regulated discharge of large rivers. - 10.4.4 Flow in a sub-continental scale basin: Mackenzie basin. - 10.5 Basin water balance. - 10.5.1 Considerations in water balance investigation. - 10.5.2 Regional tendencies. - 10.5.3 Examples from permafrost environments. - 10.6 Permafrost basin hydrology: general remarks. - References. - Appendices. - Index.
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  • 39
    Monograph available for loan
    Monograph available for loan
    Berlin [u.a.] : Springer
    Associated volumes
    Call number: AWI A4-13-0079
    In: Springer Praxis books in geophysical sciences
    Description / Table of Contents: Contents: Preface to the first edition. - Preface to the second editon. - List of figures. - List of tables. - List of symbols. - List of abbreviations. - 1 Introduction. - 2 Drift ice material. - 2.1 Sea ice cover. - 2.2 Ice floes to drift ice particles. - 2.3 Sea ice growth and melting. - 2.4 Ice thickness distribution. - 2.5 Sea ice ridges. - 2.6 Drift ice state. - 3 Ice kinematics. - 3.1 Description of ice velocity field. - 3.2 Observations. - 3.3 Stochastic modelling. - 3.4 Conservation of ice. - 4 Sea ice rheology. - 4.1 General. - 4.2 Viscous laws. - 4.3 Plastic laws. - 4.4 Granular floe collision models. - 4.5 Scaling of ice strength. - 5 Equation of drift ice motion. - 5.1 Derivation of the equation of motion. - 5.2 Atmospheric and oceanic boundary layers. - 5.3 Sea ice-ocean interaction. - 5.4 Scale analysis. - 5.5 Dynamics of a single ice floe. - 6 Free drift. - 6.1 Steady state solution. - 6.2 Non-steady case. - 6.3 Linear coupled ice-ocean model. - 6.4 Frequency spectrum of free drift. - 6.5 Spatial aspects of free drift. - 7 Drift in the presence of internal friction. - 7.1 The role of internal friction. - 7.2 Channel flow of sea ice. - 7.3 Ice drift along coastal boundary. - 7.4 Zonal sea ice drift. - 7.5 Modelling of ice tank experiments. - 7.6 Timespace scaling of ice drift. - 8 Numerical modelling. - 8.1 Numerical solutions. - 8.2 Examples of sea ice dynamics models. - 8.3 Short-term modelling applications. - 8.4 Oil spills in ice conditions. - 8.5 Climate models. - 9 Use and need of knowledge on ice drift. - 9.1 Science. - 9.2 Practice. - 9.3 Final comments. - 10 Study problems. - 10.1 Problems. - 10.2 Instructions and solutions. - 11 References. - Index.
    Description / Table of Contents: This new edition of The drift of sea ice brings the theory, observations and practical applications of research into sea ice drift completely up to date, taking in to account and discussing the many new scientific results which have been published, in particular connected with thermodynamics, ice-ocean interaction, scaling, and numerical model applications in short-term and climate forecasting. This revised and expanded text presents the geophysical theory, observations from field programs, mathematical modelling techniques, and applications of sea ice drift science. It shows how the fundamental laws of sea ice drift come from the material properties of sea ice and the basic laws of mechanics. The book provides detailed analytical modelling and mathematical models and presents the construction of numerical ice drift models. The drift of sea ice gives a collection of worked examples on sea ice dynamics; details the derivation of the fundamental laws of sea ice dynamics in an understandable form; teaches methods for local and regional ice forecasting for ice engineering applications; analyses the system of equations for the general properties of sea ice drift and the derivation of the free drift model and analytical models for ice drift in the presence of internal friction; makes an excellant source book for climate research concerning the role of sea ice dynamics in the global climate.
    Type of Medium: Monograph available for loan
    Pages: XXX, 347 Seiten , Illustrationen
    Edition: 2. Aufl., Softcover reprint of hardcover 2011
    ISBN: 9783642267574
    Series Statement: Springer Praxis books in geophysical sciences
    Language: English
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  • 40
    Series available for loan
    Series available for loan
    [Zürich] : IAHS (ICSI)
    Associated volumes
    Call number: AWI G7-14-0007
    In: Glacier mass balance bulletin
    Type of Medium: Series available for loan
    Pages: 106 S. : Ill., graph. Darst., Kt.
    Language: English
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  • 41
    Series available for loan
    Series available for loan
    Hanover, N.H. : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-350
    In: Research report / Cold Regions Research and Engineering Laboratory, 350
    Type of Medium: Series available for loan
    Pages: iv, 27 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 350
    Language: English
    Note: CONTENTS: Abstract. - Preface. - Introduction. - Sample preparation. - Apparatus and testing procedure. - Test results. - Uniaxial strength. - Initial tangent and 50% strength moduli. - Specific energy. - Discussion. - Testing method. - Compressive strength. - Tensile strength. - Ductile and brittle fracture.. - Initial tangent and 50% stress moduli. - Specific energy. - Conclusions and recommendations. - References. - Appendix A: Description of soil and calculations. - Appendix B: Description of the LVDT and averaging circuits. - Appendix C: Determination of strain in the neck section of a dumbbell specimen.
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  • 42
    Monograph available for loan
    Monograph available for loan
    Cambridge [u.a.] : Cambridge Univ. Press
    Call number: AWI S6-14-0059 ; 2/N 14.0263
    Description / Table of Contents: "This is a hands-on guide for graduate students and other young researchers wishing to perfect the practical skills that are needed for a successful career in research. By teaching junior scientists to develop effective research habits, the book helps make the experience of graduate study a more efficient, effective and rewarding one. Many graduate students learn these skills "on the job", often by doing them poorly at first, with the result that much valuable time can be lost; this book will help prevent that. The authors have taught a graduate course on the topics covered in this book for many years, and provide a sample curriculum for instructors in graduate schools who wish to teach a similar course. ... The wealth of advice offered in this book is invaluable to students, junior researchers and their mentors in all fields of science, engineering and the humanities."
    Type of Medium: Monograph available for loan
    Pages: X, 286 S. : Ill., graph. Darst.
    Edition: 1. publ. 2009, 5th print. 2013
    ISBN: 9780521743525
    Classification:
    E.7.
    Language: English
    Note: Contents: 1 Introduction. - 2 What is science?. - 3 Choices, choices, choices. - 4 The adviser and thesis committee. - 5 Questions drive research. - 6 Giving direction to our work. - 7 Turning challenges into opportunities. - 8 Ethics of research. - 9 Using the scientific literature. - 10 Communication. - 11 Publishing a paper. - 12 Time management. - 13 Writing proposals. - 14 The scientific career. - 15 Applying for a job. - 16 Concluding remarks. - Appendix A. Futher reading. - Appendix B. A sample curriculum. - Appendix C. The Refer and BibTeX format. - References. - About the authors. - Index.
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  • 43
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    Hanover, N.H. : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-349
    In: Research report / Cold Regions Research and Engineering Laboratory, 349
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Test locations. - Post Pond. - Mascoma Lake. - Winter freeze-up. - Ice cover properties. - Stratigraphy. - Microstructure. - Porosity. - Impurity content. - Flexural strength. - Test sites. - Beam test procedure. - Beam dimensions. - Beam temperatures. - Beam strengths. - Results. - Post Pond, Site PB, 12 February 1974. - Post Pond, Site PC, 21 February 1974. - Mascoma Lake, Site MD, 25 February 1974. - Mascoma Lake, Site MD, 26 February 1974. - Mascoma Lake, Site MD, 1 March 1974. - Post Pond, Site PA, 4 March 1974. - Post Pond, Site PA, 7 March 1974. - Post Pond, Site PA, 8 March 1974. - Post Pond, Site PB, 12 March 1974. - Post Pond, Midway between Sites PB and PC, 15 March 1974. - Post Pond, Midway between Sites PA and PB, 26 March 1974. - Post Pond, Midway between Sites PA and PB, 29 March 1974. - Post Pond, Midway between Sites PA and PB, 3 April 1974. - Conclusions. - Literature cited.
    Description / Table of Contents: In-place cantilever beam tests on Post Pond and Mascoma Lake ice yielded a maximum flexural strength of 7.1 kg/cm^2. The minimum strength, unrelated to failure along pre-existing cracks in the ice, was 2.9 kg/cm^2. The majority of tests were performed in the push-down mode after it was discovered that beams tested in the pull-up mode, which places the bottom surface in tension, frequently broke prematurely along cracks in the bottom of the ice. Premature failures of this kind usually occurred at stresses of 2-3 kg/cm^2. Data further demonstrate that the intrinsic strength of lake ice decreases significantly as the surface air temperature goes to 0°C. Ice that has just become isothermal, but has not yet begun to candle, has a strength of about 4 kg/cm^2; ice that has been subjected to prolonged periods of above-freezing air temperatures generally fails at about 3 kg/cm^2. Tests also show that cold unrecrystallized snow-ice is as strong as the underlying lake ice. Tests of the effect of crystalline structure indicate that ice composed of crystals with their c-axes horizontal is measurably stronger than ice in which the crystals are oriented with their c-axes vertical.
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    Pages: v, 28 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 349
    Language: English
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  • 44
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-345
    In: Research report / Cold Regions Research and Engineering Laboratory, 345
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - List of symbols. - Introduction. - Previous work. - Experimental design. - The radioisotope 22Na. - Description of apparatus. - Experimental procedure. - Correction of profiles. - Assumptions. - Decay correction. - Boundary correction. - Error analysis. - Results. - Salinity data. - Temperature data. - Growth velocity. - Discussion. - Brine and ice properties. - Brine salinity. - Brine density. - Brine volume. - Brine latent heat of freezing. - Brine viscosity, specific heat, and thermal conductivity. - Ice properties. - Theoretical brine expulsion model. - Continuity equations. - Thermal energy equation. - Simplified brine expulsion equations. - Brine expulsion in NaCl ice. - Results. - Discussion. - Gravity drainage in NaCl ice. - Application of results to natural sea ice. - Effective distribution coefficient. - Previous work. - Experimental procedure and results. - Conclusions. - Literature cited. - Appendix A: Profile correction data. - Appendix B: Program "correct" and sample output. - Appendix C: Tabulation of salinity data. - Appendix D: Tabulation of profile data. - Appendix E: Time-ice thickness equations (Runs 2 and 3). - Appendix F: Tabulation of distribution coefficient data.
    Description / Table of Contents: To obtain a better understanding of the desalination of natural sea ice, an experimental technique was developed to measure sequential salinity profiles of a growing sodium chloride ice sheet. Using radioactive 22Na as a tracer, it was possible to determine both the concentration and movement of the brine within the ice without destroying the sample. A detailed temperature and growth history of the ice was also maintained so that the variation of the salinity profiles could be properly interpreted. Since the experimental salinity profile represented a smoothed, rather than a true salinity distribution, a deconvolution method was devised to restore the true salinity profile. This was achieved without any significant loss of end points. In all respects, the salinity profiles are similar to those of natural sea ice. They have a characteristic C-shape, and clearly exhibit the effects of brine drainage. Not knowing the rates of brine expulsion or gravity drainage, the variation of the salinity profiles during the period of ice growth could be explained by either process. To determine the relative importance of the desalination mechanisms, a theoretical brine expulsion model was derived and compared to the experimental data. As input for the model, equations describing the variation of some properties of NaCl brine with temperature were derived. These included the brine salinity, viscosity, specific heat, thermal conductivity, and latent heat of freezing. The theoretical brine expulsion model was derived by performing mass and energy balances over a control volume of NaCl ice. A simplified form of the model, when compared to the experimental results, indicated that brine expulsion was only important during the first several hours of ice growth, and later became a minor desalination process relative to gravity drainage which continued to be the dominant mechanism for the remainder of the study period (up to 6 weeks). The rate of gravity drainage was found to be dependent on the brine volume and the temperature gradient of the ice. As either the brine volume or temperature gradient was increased, the rate of change of salinity due to gravity drainage increased. The equation commonly used to calculate the effective distribution coefficient (Weeks and Lofgren 1967) was modified and improved by taking brine drainage into account. An expression was also derived to give the distribution coefficient at very low growth velocities.
    Type of Medium: Series available for loan
    Pages: vii, 85 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 345
    Language: English
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  • 45
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-341
    In: Research report
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Samples. - Collection. - Preparation. - Analytical methods. - Cations. - Lead, silicon and aluminum. - Sulfate. - Comparative analyses. - Results and discussion. - Sea salt and terrestrial dust. - Sulfate. - Lead. - Summary and conclusions. - Literature cited. - Appendix A. Concentrations of chemical constituents in Dye 3 snow and ice strata.
    Description / Table of Contents: Concentrations of sodium, potassium, magnesium, calcium, silicon, aluminum, lead and sulfate were measured in surface snow and in individual annual accumulation layers from a 373-m-deep ice core from Dye 3, Greenland, covering the time period from 1232 to 1971 A.D. Average background (pre-1840) concentrations in micrograms/liter are: Na, 12.9 ± 9.3; K, 2.2 ± 2.1; Mg, 1.5 ± 1.0; Ca, 4.8 ± 2.4; Si, 12 ± 6; Al, 3.3 ± 1.4; Pb, 0.07 ± 0.06; and SO4, 56 ± 22. Deviations are due mainly to the variability of the concentrations in the samples deposited over the stated time interval rather than analytical precision. Observed concentrations of sodium, potassium, magnesium, calcium, silicon and aluminum can be adequately explained by relative abundances of these elements in seawater andterrestrial dust. Late 19th century annual ice layers contain twice as much sulfate as pre-1840 deposits, reflecting the increased use of fossil fuels in the Northern Hemisphere. Lead concentrations in post-1955 snow deposits are more than an order of magnitude greater than pre-1840 baseline concentrations and are attributed to smelting and the increased use of lead alkyls in gasoline.
    Type of Medium: Series available for loan
    Pages: v, 18 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 341
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  • 46
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-313
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Nomenclature. - Introduction. - Funicular regime. - Grain growth. - Grain contacts. - Densification. - Pendular regime. - Discussion and conclusions. - Literature cited. - Abstract.
    Description / Table of Contents: Grain growth, bond growth and densification of wet snow are described in terms of the distribution of equilibrium temperature in the snow matrix. At high water saturations the equilibrium temperature increases with grain size; hence, small particles melt away as large particles grow. Melting also occurs at the intergrain bonds, causing a low strength and rapid densification. At low saturations the equilibrium temperature is determined by the capillary pressure and the particle sizes have only a second order effect. Therefore, grain growth proceeds slowly and, even at large overburden pressures, no intergrain melting occurs. At low saturations the water "tension" acts through a finite area, thus large attractive forces exist between the grains, and the strength of the snow matrix is large.
    Type of Medium: Series available for loan
    Pages: v, 13 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 313
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  • 47
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-314
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Previous work. - Sea ice terrain model. - Traffic ability model. - Analytic calculation of DT/DSL. - Monte Carlo calculation. - Results of traffic ability computations. - Experimental traffic ability ratios using ridge overlays. - Regional variations in ridging intensity. - Additional traffic ability aspects of sea ice. - Shear zone and rubble fields. - Linear lead systems. - Conclusions. - Literature cited. - Appendix A. Distribution of the lateral extent of ridges. - Abstract.
    Description / Table of Contents: A sea ice terrain model, based upon previously tested height and spacing distributions for sea ice pressure ridging, is developed. Using this model, and additional information on pressure ridge extents, a trafficability model for vehicles traversing the pack ice is developed. Both analytic and Monte Carlo calculations of vehicle trafficability, measured in terms of the average ratio of the total distance traveled over a straight-line distance, are performed. The calculations include cul-de-sacs due to ridge intersections. The trafficability ratio is given as a function of ridge-height-clearance ability of the vehicle and of ridging parameters which may be obtained from laser profiles of the arctic pack ice. Results are in good agreement with simulated routes through sea ice terrain taken from aerial photo mosaics. Contour plots of ridging parameters taken from laser profilometry are also supplied. These plots, together with the trafficability model, supply mobility information for the whole of the western portion of the Arctic Basin.
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    Pages: iii, 21 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 314
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  • 48
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-311
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Notation. - Introduction. - Review of observations. - Review of theory. - Water flow through textured layers. - Water flow past semipermeable layers. - Discussion. - Literature cited. - Abstract.
    Description / Table of Contents: The flow of water through layered snowpacks is discussed. A method for predicting flow through unsaturated layers is given. The flow along ice layers and through ice layers is analyzed in terms of the slope, permeability, thickness and length of the layers. It is shown that the permeability of ice layers required to cause large flow diversions is quite small. The effect of slope is large even at small angles.
    Type of Medium: Series available for loan
    Pages: v, 15 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 311
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  • 49
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-309
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Symbols. - Introduction. - Physical setting. - Flow model. - Calculated flow. - Existing profile. - Proposed profiles. - Profile 1. - Profile 2. - Profile 3. - Profile 4. - Profile 5. - Profile 6. - Profile 7. - Total excavation. - Interpretation and conclusions. - Sources of error. - Recommendations. - Literature cited. - Appendix A. - Abstract.
    Description / Table of Contents: The Marcona Corporation and Kryolitselskabet ?resund, A/S (a Danish corporation) are cooperatively investigating the possibility of developing an open-pit mine along the edge of the Greenland Ice Cap. The response of the glacier to a sudden change in surface slope and thickness is calculated. The existing flow is diverted away from the mineral deposit but will increase when the excavation begins. It is calculated that 66 million cubic meters of ice must be removed in order to establish a stable profile beyond the pit. An additional 7.9 million cubic meters of ice must be removed yearly in order to maintain the profile.
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    Pages: v, 25 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 309
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  • 50
    Call number: ZSP-202-347
    In: Research report / Cold Regions Research and Engineering Laboratory, 347
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Experimental. - Results and discussion. - Applications. - Literature cited.
    Description / Table of Contents: Chemical analysis of century-old ice from continuous 5 to 7 year intervals of three ice cores from south and central Greenland (Dye 3, Milcent and Crete) show maximum concentrations of Na, Mg,Ca, K, and Al during early spring and minimum concentrations during late summer and early fall. Peak spring values are as much as 10 times greater than fall values. Because of the large seasonal chemical variations, samples used for depth-age or annual deposition rate studies must represent accumulation from exactly one year or whole multiples of a year. The seasonal chemical variations seem promising as a new method of defining annual layers and thus dating old ice cores.
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    Pages: iii, 5 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 347
    Language: English
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  • 51
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-336
    In: Research report
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Nomenclature. - Introduction. - Description of study. - Sample preparation. - Test equipment and procedure. - Discussion of results. - Stress-density relationship. - Effect of rate of deformation. - Effect of temperature. - Effect of initial snow density. - Stress-deformation relationship. - Summary and conclusions. - Microstructural analysis. - Introduction. - Analytical methods. - Results and discussion. - Conclusion. - Literature cited. - Anpendix: Test data.
    Description / Table of Contents: The effects of snow temperature, rate of deformation, and initial density on the stress vs density and stress vs deformation relationships were investigated in the pressure range of 0.1 to 75 bars. The rate of deformation in the range of 0.027 to 27 cm sec^-1 does not have a significant effect. A decrease in temperature in the range of 0° to -40°C increases the resistance to stress and deformation, the temperature effect increasing with applied pressure and initial density. The effect of initial density is significant. For any stress, an increase in the initial density results in an increase in the resulting density, particularly at low stress levels and at temperatures near 0°C. The texture of artificially compacted snow is significantly different from that of naturally compacted snow of the same density because of the very short recrystallization time period.
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    Pages: iv, 57 Seiten , Illustrations
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 336
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  • 52
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    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-334
    In: Research report
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - List of symbols and associated dimensions. - Introduction and purpose. - Site characteristics. - Outline of study scheme. - Analysis. - Heat conduction to the drill hole. - Heat transfer between conduit wall and coolant. - Heat transfer between surface pipe and air. - Total heat extraction process. - Example calculations. - Estimate of basal water thickness and flow rates. - Summary of investigations of multiple-hole. - Literature cited.
    Description / Table of Contents: A scheme for cooling the lower portion of the edge of the Greenland ice sheet, which abuts a potential mining operation, is examined. The magnitude of cooling which may be accomplished by drilling a series of holes about the periphery of the mine site is determined as a function of hole size, spacing and time. Refrigeration is accomplished by pumping a coolant downhole in a central pipe, then uphole in an annulus between the pipe and hole wall, and then through a thin-walled pipe exposed to the surface climate above the ice sheet. It was found possible to achieve a temperature change in the ice of the order of -1°C with hole spacings and pumping requirements which are considered reasonable. Other effects are briefly examined and include an estimate of the basal water thickness and flow rates.
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    Pages: vii, 19 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 334
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  • 53
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    Hanover, NH : Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-327
    In: Research report / Cold Regions Research and Engineering Laboratory
    Description / Table of Contents: CONTENTS: Preface. - Introduction. - Theory of formation, growth and precipitation of ice crystals. - Fog characteristics. - Liquid water content. - Size distribution of liquid water droplets. - Results and discussion. - Sudden expansion system. - Continuous flow. - Conclusions and recommendations. - Conclusions. - Recommendations. - Literature cited. - Abstract.
    Description / Table of Contents: Two compressed air systems for glaciating supercooled clouds were studied in the laboratory. The first system used the sudden expansion of compressed air and was found to be most efficient at 27 psig producing an average of 5.2 x 10^8 ice crystals per cm^3 of air. The second system used a continuous flow of air through nozzles of various designs, of which the supersonic nozzle was found to be the most efficient, producing a maximum of 2.5 x 10^8 crystals per cm^3 of air at 27 psig. The above data were obtained at an ambient temperature of -4°C, but data for other temperatures and pressures were obtained and are presented in the text.
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    Pages: iii, 11 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 327
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  • 54
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    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-267
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Regional variations in density. - Monthly increase in density. - Nomograph to estimate average snow-cover density. - Test and application of the nomograph. - Discussion. - Literature cited. - Appendix A: Observed, weighted snow-cover densities for stations in Table 1.
    Description / Table of Contents: Analysis of snow-cover observations made during November - March at 27 stations in Alaska, Canada and the northern United States for a 2 to 11 year period showed that the average snow density can be classified in four general categories: Category 1 (density 0.20 to 0.23 g/cm^3 ), inland stations reporting light winds; Category 2 (0.24 to 0.27 g/cm^3), stations reporting moderate winds; Category 3 (0.28 to 0.30 g/cm^3), inland and coastal locations with stronger winds; Category 4 (0.32 to 0.36 g/cm^3), cold and windy stations of the Arctic. Skewness coefficients computed for each station showed bias toward lower densities for cat. 1 and 2, and bias toward higher densities for cat. 3 and 4. A nomograph in which the average winter air temperature and wind speed are the independent variables makes it possible to estimate the average snow-cover density for any location in the Arctic, subarctic and North Temperate Zones. A comparison between observed and estimated densities for ten other test stations yielded a correlation coefficient of 0.91 with a standard error of estimate of 0.016 g/cm^3. An average snow density map of North America was drawn and the continent was divided into areas based on the four categories.
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    Pages: iii, 21 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 267
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  • 55
    Call number: ZSP-202-262
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Regional setting. - General description and topography. - Geology. - Soils. - Climate. - Precipitation. - Temperature. - Weather during period of study. - Vegetation. - Hydrology. - Water balance. - Introduction. - Yield. - Precipitation. - Loss of glacial storage. - Evapotranspiration. - Summary. - Flow variability. - Flow-duration curves. - Flood estimation. - Response to rain and meltwater. - Water quality. - Introduction. - Suspended sediment. - Bedload. - Dissolved sediment. - Water temperatures. - Channel shape and process. - General characteristics of braided channels. - Channel material. - Channel shape. - Channel changes. - Introduction. - Channel profiles. - Ground photography. -Vertical aerial photography. - Freeze-up and breakup. - Summary. - Literature cited. - Selected bibliography. - Appendix A: Measurement site locations and methods. - Appendix B: Installation of water-level recorder. - Appendix C: Delta river quicksilts - properties and mode of formation. - Appendix D: Channel shape data. - Abstract.
    Description / Table of Contents: A one-year reconnaissance study was made of a large braided glacial river and its drainage basin (drainage area 1665 m^2; elevation range 1000 - 10,000 ft) for which a minimum of hydrometric and meteorologic data existed. The report includes estimates of the water balance, flow-duration curves, and sediment characteristics, and descriptions of stream response to glacial melt and rain, channel geometry and channel processes. Mean annual basin precipitation is estimated at 40.4 in. and mean annual loss of permanent glacial storage is about 1 in. About 30% of this leaves the basin as evapotranspiration, 50% as stream flow, and 20% as groundwater flow. Characteristics of response to glacial melt are outlined. Flow peaks near the mouth occur within 24 hours of rainfall Greater than 0.5 in./day at foothills meteorological stations; rains of less than that amount do not generally produce discernible stream response. Stream channel geometry is described in detail. Most channels on the lower floodplain are asymmetrical and are roughly triangular or parabolic, and have high width/depth ratios. At-a-station hydraulic geometry is described. Surveys and gr ound and aerial photography are used to describe channel changes.
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    Pages: v, 83 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 262
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  • 56
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-260
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction and statermnt of problem. - Solution of problem shown in Figure 3. - Solution of problem shown in Figure 4. - The negligibility of the effects of buoyancy and incompressibility of the sealed liquid. - Literature cited.
    Description / Table of Contents: After a brief description of the circumstances which led to the investigation of the title problem and discussion of some related previous investigations, exact solutions are derived for a circular plate which seals an incompressible liquid, is clamped along the boundary and is subjected at an arbitrary point to a lateral concentrated force P. For the case when the plate is covered by a thin liquid layer the solution is obtained in closed form. When this liquid layer is absent, the solution is obtained as an infinite series. The paper concludes with a study of the range of the parameter ([Lambda] a) for which the effort of buoyancy is negligible upon the deflections and stresses in the plate.
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    Pages: iv, 11 Seiten , Illustartionen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 260
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  • 57
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-254
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Description of the anemometer. - Temperature effects and their compensation. - Input-output relations. - Vibration isolation and compensation. - Wind tunnel tests. - Conclusions.
    Description / Table of Contents: A triaxial semiconductor strain-gage anemometer measuring wind velocities in three directions and thereby also determining the direction of the wind was designed and subjected to many crucial tests under various conditions. It was found that the measurements were affected by temperature and vibrations. Temperature compensation in two directions was made and wind tunnel tests on an almost vibration-free platform were performed. The results show that this type of instrument can be successfully used to measure large-scale turbulences. Throughout this report, emphasis is placed on the compensation necessary for temperature and vibration effects and the determination of input-output relationships. It is concluded that it is possible to design a practical triaxial strain-gage anemometer with high-frequency response and high sensitivity and to measure wind velocities accurately with this type of instrument when temperature and vibration compensations are properly made.
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    Pages: iv, 15 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 254
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  • 58
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-302
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Literature review. - Experimental procedure. - Experimental and theoretical equations. - Results and discussion. - Conclusions. - Literature cited. - Appendix A. Some problems in the experimental determination of the extinction coefficient of ice fog. - Appendix B. Ice fog production technique. - Appendix C. Ice fog samples and their corresponding particle spectra. - Abstract.
    Description / Table of Contents: Laser extinction measurements in ice fog were made at wavelengths of 0.6328, 1.15 and 3.39 microns. The ice fog was generated in an environmental chamber whose temperature could be lowered to -43°C. Particle sampling was carried out simultaneously with the laser measurements using an impactor. Size distributions were derived from the impactor measurements. These data were used to compute Mie extinction coefficients at the three laser wavelengths. These coefficients were compared with the coefficients derived experimentally. Although some discrepancy exists between theory and experiment, both agree fairly well on the behavior of the extinction coefficient as a function of particle concentration.
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    Pages: iii, 23 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 302
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  • 59
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-298
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - I. Introduction. - II. A statistical theory of trafficability. - Statistical descriptions of trafficability. - Statistical modeling of trafficability. - Trafficability in a variable space with comparison to a fixed space. - III. Statistical description of sea ice. - Homogeneous, isotropic, and normal random function. - Upper bound of probability for finding an obstacle derived from two-point probability density function. - IV. Design criteria of a SEV derived from sea ice surface roughness. - Literature cited. - Appendix: Statistics of a variable space.
    Description / Table of Contents: Efforts were made to derive the design criteria of surface effect vehicles operated on arctic sea ice. Statistical theories were developed to describe trafficability of the vehicles and topography of the sea ice. By the use of actual sea ice surface profiles obtained by an aerial laser profiler, the usefulness of the present statistical method was demonstrated.
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    Pages: iii, 19 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 298
    Language: English
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  • 60
    Series available for loan
    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-283
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Determination of CEC of earth materials using isotopic exchange. - Determination of CEC of earth materials using isotopic labeling. - Appendix: Procedure for determination of CEC of earth materials by isotopic labeling.
    Description / Table of Contents: Two radiochemical methods were investigated for determining the cation exchange capacity of earth materials having a wide range in physicochemical properties. The first method attempted was unsuccessful but involved determination of the radioactivity of a 22Na-NaOAc solution in isotopic equilibrium with a Na+-saturated mineral phase. The logic of this method is presented in order to illustrate principles of isotopic exchange in mineral systems. The method finally adopted is based upon determination of the radioactivity of a salt-free, Na+-saturated mineral sample prepared using a radioactive NaOAc solution with a known 22Na-NaOAc composition. This method is less time-consuming and more accurate than the conventional ammonium acetate method for cation exchange capacity determinations.
    Type of Medium: Series available for loan
    Pages: iii, 12 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 283
    Language: English
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  • 61
    Series available for loan
    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-282
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Analytical procedures. - Measurement of crystal size. - Measurement of crystalorientation. - Results and discussion. - Byrd Station crystal structure and fabrics. - Little America V crystal structure and fabrics. - Conclusions. - Literature cited. - Abstract.
    Description / Table of Contents: Radical differences in the crystal structure and fabrics of glacier ice cores at Byrd Station and Little America V, Antarctica, are attributed to gross differences in the thermal and deformational histories of the ice at these two locations. At Byrd Station the mean size of crystals increased more than sixfold between 65 m and the bottom of the drill hole at 309 m. Crystal size was also found to increase linearly with the age of the ice, thus simulating isothermal grain growth in metals. However, this growth was not accompanied by any dimensional orientation of crystals or entrapped bubbles, or by any significant increase in the degree of preferred orientation of crystallographic c-axes. These observations imply that negligible shearing is occurring in the top 300 m of the thick grounded ice sheet at Byrd Station. By contrast very considerable deformation is indicated for the floating 258-m-thick Ross Ice Shelf at Little America. This deformation is characterized by the widespread occurrence of "strained" crystals below 65 m, the existence of elongated oriented bubbles between 95 m and 130 m and the attainment of pronounced crystal orientation (multiple-maxima fabrics) by 100-m depth. Exaggerated growth of crystals below 150 m is attributed to increasing temperatures in the ice shelf. The crystal structure of these cores clearly demonstrates that glacial ice only is present in the Ross Ice Shelf at Little America V.
    Type of Medium: Series available for loan
    Pages: iii, 21 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 282
    Language: English
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  • 62
    Call number: AWI A3-12-0018
    In: Atmospheric and oceanographic sciences library, Vol. 43
    Description / Table of Contents: The Arctic is now experiencing some of the most rapid and severe climate change on earth. Over the next 100 years, climate change is expected to accelerate, contributing to major physical, ecological, social, and economic changes, many of which have already begun. Changes in arctic climate will also affect the rest of the world through increased global warming and rising sea levels. The volume addresses the following major topics: research results in observing aspects of the Arctic climate system and its processes across a range of time and space scales; representation of cryospheric, atmospheric, and oceanic processes in models, including simulation of their interaction with coupled models; our understanding of the role of the arctic in the global climate system, its response to large-scale climate variations, and the processes involved.
    Type of Medium: Monograph available for loan
    Pages: XIV, 464 Seiten , Illustrationen
    ISBN: 9789400720268
    Series Statement: Atmospheric and oceanographic sciences library 43
    Language: English
    Note: Contents: 1 The origins of ACSYS / Victor Savtchenko. - PART I OBSERVATIONS: 2 Advances in Arctic atmospheric research / James E. Overland and Mark C. Serreze. - 3 Sea-ice observation: advances and challenges / Humfrey Melling. - 4 Observations in the ocean / Bert Rudels, Leif Anderson, Patrick Eriksson, Eberhard Fahrbach, Martin Jakobsson, E. Peter Jones, Humfrey Melling, Simon Prinsenberg, Ursula Schauer, and Tom Yao. - 5 Observed hydrological cycle / Hermann Mächel, Bruno Rudolf, Thomas Maurer, Stefan Hagemann, Reinhard Hagenbrock, Lev Kitaev, Eirik J. Førland, Vjacheslav Rasuvaev, and Ole Einar Tveito. - 6 Interaction with the global climate system / T. A. McClimans, G. V. Alekseev, O. M. Johannessen, and M. W. Miles. - PART II MODELLING: 7 Mesoscale modelling of the Arctic atmospheric boundary layer and its interaction with sea ice / Christof Lüpkes, Timo Vihma, Gerit Birnbaum, Silke Dierer, Thomas Garbrecht, Vladimir M. Gryanik, Micha Gryschka, Jörg Hartmann, Günther Heinemann, Lars Kaleschke, Siegfried Raasch, Hannu Savijärvi, K. Heinke Schlünzen, and Ulrike Wacker. - 8 Arctic regional climate models / K. Dethloff, A. Rinke, A. Lynch, W. Dorn, S. Saha, and D. Handorf. - 9 Progress in hydrological modeling over high latitudes: under arctic climate system study (ACSYS) / Dennis P. Lettenmaier and Fengge Su. - 10 Sea-ice-ocean modelling / Rüdiger Gerdes and Peter Lemke. - 11 Global climate models and 20th and 21st century Arctic climate change / Cecilia M. Bitz, Jeff K. Ridley, Marika Holland, and Howard Cattle. - 12 ACSYS: Scientific foundation for the climate and cryosphere (CliC) project / Konrad Steffen, Daqing Yang, Vladimir Ryabinin, and Ghassem Asrar.
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  • 63
    Series available for loan
    Series available for loan
    [Zürich] : IAHS (ICSI)
    Associated volumes
    Call number: AWI G7-12-0001
    In: Glacier mass balance bulletin
    Type of Medium: Series available for loan
    Pages: 102 S. : Ill., graph. Darst., Kt.
    Language: English
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  • 64
    Series available for loan
    Series available for loan
    [Zürich] : IAHS (ICSI)
    Associated volumes
    Call number: AWI G7-12-0031
    In: Glacier mass balance bulletin
    Type of Medium: Series available for loan
    Pages: 96 S. : Ill., graph. Darst., Kt.
    Language: English
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  • 65
    Call number: AWI G5-12-0041
    In: Tracking environmental change using lake sediments, Volume 5
    In: Developments in paleoenvironmental research, Volume 5
    Type of Medium: Monograph available for loan
    Pages: XVIII, 745 Seiten , Illustrationen
    ISBN: 9789400727441 , 978-94-007-2744-1
    Series Statement: Developments in paleoenvironmental research 5
    Language: English
    Note: Contents: PART I INTRODUCTION, NUMERICAL OVERVIEW, AND DATA-SETS. - 1 The march towards the quantitative analysis of palaeolimnological data. - 2 Overview of numerical metods in Palaeolimnology. - 3 Data-Sets. - PART II NUMERICAL METHODS FOR THE ANALYSIS OF MODERN AND STRATIGRAPHICAL PALAEOLIMNOLOGICAL DATA. - 4 Introduction and overview Part II. - 5 Exploratory data analysis and data display. - Assessment of uncertainities associated with Palaeolimnological laboratory methods and microfossil analysis. - 7 Clustering and partitioning. - 8 From Classical to canonical ordination. - 9 Statistical learning in Palaeolimnology. - PART III NUMERICAL METHODS FOR THE ANALYSIS OF STRATIGRAPHICAL PALAEOLIMNOLOGICAL DATA. - 10 Introduction and overview of Part III. - 11 Analysis of stratigraphical data. - 12 Estimation of age-depth relationships. - 13 Core correlation. - 14 Quantitative environmental reconstructions from biological data. - 15 Analogue methods in Palaeolimnology. - 16 Autocorrelogram and Periodogram analysis of palaeolimnological temporal-series from lakes in Central and Western North America to assess shifts in drought conditions. - PART IV CASE STUDIES AND FUTURE DEVELOPMENTS IN QUANTITATIVE PALAEOLIMNOLOGY. - 17 Introduction and overview of Part IV. - 18 Limnological responses to environmental changes at Inter-annual to decadal time-scales. - 19 Human impacts: applications of numerical methods to evaluate surface-water acidification and eutrophication. - 20 Tracking Holocene climatic change with aquatic biota from lake sediments: case studies of commonly used numerical techniques. - 21 Conclusions and future challenges. - Glossary. - Index.
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  • 66
    Monograph available for loan
    Monograph available for loan
    New York : Apress
    Call number: AWI S2-12-0083
    Description / Table of Contents: Beginning R: An Introduction to Statistical Programming shows you how to use this open-source language and take advantage of its extensive statistical and graphing capabilities. Indeed, R has become the de facto standard for doing, teaching, and learning computational statistics. With this book, you'll learn the language by using it right from the start - an approach giving valuable, firsthand experience. Author and expert R programmer Larry Pace guides you through a wide range of projects, teaching you best practices and offering clear explanations of the statistics involved and how they are applied. You'll see how to: acquire and install R; import and export data and scripts; generate basic statistics and graphics; write custom functions in the R language; explore different statistical interpretations of your data; implement simulations and other advanced techniques.
    Type of Medium: Monograph available for loan
    Pages: xxiv, 310 Seiten , Illustrationen
    ISBN: 9781430245544
    Series Statement: The expert's voice in programming
    Language: English
    Note: Contents: About the author. - About the technical reviewer. - Acknowledgments. - Introduction. - Chapter 1: Getting R and getting started. - Chapter 2: Programming in R. - Chapter 3: Writing reusable functions. - Chapter 4: Summary statistics. - Chapter 5: Creating Tables and graphs. - Chapter 6: Discrete probability distributions. - Chapter 7: Computing normal probabilities. - Chapter 8: Creating confidence intervals. - Chapter 9: Performing t tests. - Chapter 10: One-way analysis of variance. - Chapter 11: Advanced analysis of variance. - Chapter 12: Correlation and regression. - Chapter 13: Multiple regression. - Chapter 14: Logistic regression. - Chapter 15: Chi-square tests. - Chapter 16: Nonparametric tests. - Chapter 17: Using R for simulation. - Chapter 18: The 'new' statistics: resampling and bootstrapping. - Chapter 19: Making an R package. - Chapter 20: The R commander package. - Index
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  • 67
    Series available for loan
    Series available for loan
    Stockholm : Department of Physical Geography and Quaternary Geology, Stockholm University
    Associated volumes
    Call number: AWI G2-13-0052
    In: Dissertations from the Department of Physical Geography and Quaternary Geology
    Description / Table of Contents: The Arctic is subject to growing economic and political interest. Meanwhile, its water and climate systems are in rapid transformation. Relevant and accessible information about water and climate is therefore vital to detect, understand and adapt to the changes. This thesis investigates hydrological monitoring systems, climate model data, and our understanding of hydro-climatic change, for adaptation to water system changes in the Arctic. Results indicate a lack of harmonized water chemistry data, which may impede efforts to understand transport and origin of key waterborne constituents. Further development of monitoring cannot rely only on a reconciliation of observations and projections on where climate change will be the most severe, as they diverge in this regard. Climate model simulations of drainage basin temperature and precipitation have improved between two recent model generations, but large inaccuracies remain for precipitation projections. Late 20th-century discharge changes in major Arctic rivers generally show excess of water relative to precipitation changes. This indicates a possible contribution of stored water from permafrost or groundwater to sea level rise. The river contribution to the increasing Arctic Ocean freshwater inflow matches that of glaciers, which underlines the importance of considering all sources when assessing change. To provide adequate information for research and policy, Arctic hydrological and hydrochemical monitoring needs to be extended, better integrated and made more accessible. This especially applies to hydrochemistry monitoring, where a more complete set of monitored basins is motivated, including a general extension for the large unmonitored areas close to the Arctic Ocean. Improvements in climate model parameterizations are needed, in particular for precipitation projections. Finally, further water-focused data and modeling efforts are required to resolve the source of excess discharge in Arctic rivers.
    Type of Medium: Series available for loan
    Pages: Getr. Zählung
    ISBN: 9789174476385
    Series Statement: Dissertations from the Department of Physical Geography and Quaternary Geology 35
    Language: English
    Note: Zugl.: Stockholm, Univ., Diss., 2013
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  • 68
    Call number: ZSP-202-346
    In: Research report / Cold Regions Research and Engineering Laboratory, 346
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - USA CRREL project and personnel involvement. - Part I. Introduction. - Background. - Literature review. - Part II. CRREL investigations from 1970 - 1974. - Initial literature survey (1970). - Oil detection kit development. - Survey of Cape Simpson, Alaska, natural crude oil seepages (1970). - Haines-Fairbanks military pipeline investigations (1971-1973). - Barrow investigations (1970-1974). - Fairbanks and Fox investigations. - Germination studies. - Physiological studies. - Dispersant studies. - Microbiological investigations. - Field investigations of accidental petroleum losses. - Part III. Recent related literature. - Part IV. Conclusions and recommendations. - USA CRREL reports, publications and presentations on Alaska oil spill research. - Literature cited.
    Description / Table of Contents: Knowledge concerning the biological effects of oil pollution on arctic and subarctic terrestrial ecosystems is limited. USA CRREL research personnel conducted investigations from 1970 through 1974 to expand information in this field. Objectives were to: 1) define the ecosystems most sensitive to the presence of crude oil or its refined products, 2) quantify and understand the injury response, and 3) establish time frames for manifestation of damage and natural restorative processes in arctic and subarctic regions. This was accomplished through: 1) surveys of natural oil seepages and past accidential spills in the Arctic and Subarctic, 2) initiation of controlled oil spills and 3) detailed laboratory investigations. Results demonstrated that terrestrial oil spills will to some degree be detrimental to both arctic and subarctic plant communities. Degree and longevity of damage will be influenced primarily by the magnitude of the spill, season of occurrence and existing soil moisture content. Rapid recovery of plant communities subjected to spills will occur only if root systems remain relatively unaffected. Damage will be more extensive and long-term when root systems are saturated with oil. Effects of damage will be manifested gradually over several seasons being influenced by winter stresses. Variation does exist in plant species susceptibility. Carex aquatilis, a predominant sedge of the arctic, is markedly resistant to crude oil damage. In the taiga Picea mariana is very susceptible. Plant recovery can be enhanced through the application of fertilizer. Fertilization, in addition to its direct effect on plant nutrition, will stimulate microbial decomposition of crude oil.
    Type of Medium: Series available for loan
    Pages: vii, 66 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 346
    Language: English
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  • 69
    Call number: ZSP-202-343
    In: Research report
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Experimental procedure. - Experimental and theoretical equations. - Results and discussion. - Conclusions. - Literature cited.
    Description / Table of Contents: Simultaneous laser extinction measurements were made in warm fog at wavelengths of 0.6238, 1.15 and 10.6 [Mu]. The warm fog was generated in a 4-m^3 environmental chamber. Particle sampling was carried out simultaneously with the laser measurements using an impactor. Using the same size distribution in each case the theoretical extinction coefficients were calculated and compared with the experimental coefficients. Results obtained during this experiment and aprevious one indicate that propagation at 1.15 [Mu] is adversely affected by the presence of atmospheric water vapor. Experimental data obtained simultaneously at 0.6328 and 10.6 [Mu] indicate that virtually no difference exists between the extinction coefficients at these two wavelengths for moderate particle concentrations while at much larger concentrations [Alpha]0.6328 increases indefinitely while [Alpha]10.6 levels off at 0.2.
    Type of Medium: Series available for loan
    Pages: iii, 7 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 343
    Language: English
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  • 70
    Series available for loan
    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-342
    In: Research report / Cold Regions Research and Engineering Laboratory
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Experimental procedure. - Results. - Work-hardening effect. - Strain rate sensitivity of flow stress. - Discussion. - Conclusions. - Literature cited.
    Description / Table of Contents: Single crystals of high purity ice deformed by uniaxial compression on an Instron machine showed remarkable work-hardening after about 8% strain. By changing the strain rate during compression tests in the plastic region of the stress-strain curve, an apparent activation volume V* and a dislocation mobility exponent m were calculated from the strain rate sensitivity of flow stress. The large work-hardening and the rapid increase in the value of m beyond about 10% strain indicate that the plastic flow in this region is controlled by dislocation intersections and nonconservative motion of jogs.
    Type of Medium: Series available for loan
    Pages: iii, 11 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 342
    Language: English
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  • 71
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-310
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Field sites and procedures. - Results. - Discussion. - Conclusions. - Literature cited. - Appendix A: Tabulation of AIDJEX core data. - Appendix B: Tabulation of average salinity/ice thickness data. - Abstract.
    Description / Table of Contents: The salinity distribution in multiyear sea ice is dependent on the ice topography and cannot be adequately represented by a single average profile. The cores collected from areas beneath surface hummocks generally showed a systematic increase in salinity with depth from 0 0/00 at tne surface to about 4 0/00 at the base. The cores collected from areas beneath surface depressions were much more saline and displayed large salinity fluctuations. Salinity observations from sea ice of varying thicknesses and ages collected at various arctic and subarctic locations revealed a strong correlation between the average salinity of the ice, S, and the ice thickness, h. For salinity samples collected from cold sea ice at the end of the growth season, this relationship can be represented by two linear equations: S = 14.24 - 19.39h (h? 0.4 m) ; S = 7.88 - 1.59h (h 〉 0.4 m) . It is suggested that the pronounced break in slope at 0.4 m is due to a change in the dominant brine drainage mechanism from brine expulsion to gravity drainage. A linear regression for the data collected during the melt season gives S = 1.58 + 0.18h. An annual cyclic variation of the mean salinity probably exists for multiyear sea ice. The mean salinity should reach a maximum at the end of the growth season and a minimum at the end of the melt season.
    Type of Medium: Series available for loan
    Pages: iii, 23 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 310
    Language: English
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  • 72
    Monograph available for loan
    Monograph available for loan
    Cambridge : Cambridge University Press
    Call number: AWI G1-14-0041
    Type of Medium: Monograph available for loan
    Pages: xiii, 442 Seiten , Illustrationen, Karten
    Edition: first published
    ISBN: 9780521696715 , 978-0-521-69671-5
    Language: English
    Note: Contents: Preface. - Acknowledgements. - PART 1 INTRODUCTION. - 1 Introduction. - 1.1 Humans and the coastal zone. - 1.2 Approaches to the study of coasts. - 1.3 Information sources. - 1.4 Approach and organisation. - References. - 2. Coastal geomorphology. - 2.1 Definition and scope of coastal geomorphology. - 2.2 The coastal zone: definition and nomenclature. - 2.3 Factors influencing coastal morphology and processes. - References. - PART 2 COASTAL PROCESSES. - 3. Sea level fluctuations and changes. - 3.1 Synopsis. - 3.2 Mean sea level, the geoid, and changes in mean sea level. - 3.3 Changes in mean sea level. - 3.4 Astronomical tides. - 3.5 Short-term dynamic changes in sea level. - 3.6 Climate change and sea level rise. - References. - 4. Wind-generated waves. - 4.1 Synopsis. - 4.2 Definition and characteristics of waves. - 4.3 Measurement and description of waves. - 4.4 Wave generation. - 4.5 Wave prediction. - 4.6 Wave climate. - Further reading. - Preferences. - 5. Waves - wave theory and wave dynamics. - 5.1 Synopsis. - 5.2 Wave theories. - 5.3 Wave shoaling and refraction. - 5.4 Wave breaking. - 5.5 Wave groups and low-frequency energy in the surf and swash zones. - Further reading. - References. - 6. Surf zone circulation. - 6.1 Synopsis. - 6.2 Undertow. - 6.3 Rip cells. - 6.4 Longshore currents. - 6.5 Wind and tidal currents. - Further reading. - References. - 7. Coastal sediment transport. - 7.1 Synopsis. - 7.2 Sediment transport mechanisms, boundary layers and bedforms. - 7.3 On-offshore sand transport. - 7.4 Longshore sand transport. - 7.5 Littoral sediment budget and littoral drift cells. - Further reading. - References. - PART 3 COASTAL SYSTEMS. - 8. Beach and nearshore systems. - 8.1 Synopsis. - 8.2 Beach and nearshore sediments and morphology. - 8.3 Nearshore morphodynamics. - 8.4 Beach morphodynamics. - References. - 9. Coastal sand dunes. - 9.1 Synopsis. - 9.2 Morphological components of coastal dunes and dune fields. - 9.3 Plant communities of coastal dunes. - 9.4 Aeolian processes in coastal dunes. - 9.5 Sand deposition. - 9.6 Beach / dune interaction and foredune evolution. - 9.7 Management of coastal dunes. - References. - 10. Barrier systems. - 10.1 Synopsis. - 10.2 Barrier types and morphology. - 10.3 Barrier dynamics: overwash and inlets. - 10.4 Barrier spit morphodynamics. - 10.5 Barrier islands. - 10.6 Management of barrier systems. - References. - 11. Salt marshes and mangroves. - 11.1 Synopsis. - 11.2 Saltmarsh and mangrove ecosystems. - 11.3 Salt marshes. - 11.4 Mangroves. - 11.5 Conservation and management of saltmarshes and mangroves. - Further reading. - References. - 12. Coral reefs and atolls. - 12.1 Synopsis. - 12.2 Corals and reef formation. - 12.3 Geomorphology and sedimentology of coral reefs. - 12.4 Impacts of disturbance on coral reefs. - Further reading. - References. - 13. Cliffed and rocky coasts. - 13.1 Synopsis. - 13.2 Cliffed coast morphology. - 13.3 Cliffed coast erosion system. - 13.4 Cohesive bluff coasts. - 13.5 Rock coasts. - 13.6 Shore platforms. - 13.7 Management of coastal cliff shorelines. - Further reading. - References. - Index
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  • 73
    Monograph available for loan
    Monograph available for loan
    Washington : National Academies Press
    Call number: AWI P5-14-0057
    Description / Table of Contents: Once ice-bound, difficult to access, and largely ignored by the rest of the world, the Arctic is now front and center in the midst of many important questions facing the world today. Our daily weather, what we eat, and coastal flooding are all interconnected with the future of the Arctic. The year 2012 was an astounding year for Arctic change. The summer sea ice volume smashed previous records, losing approximately 75 percent of its value since 1980 and half of its areal coverage. Multiple records were also broken when 97 percent of Greenland's surface experienced melt conditions in 2012, the largest melt extent in the satellite era. Receding ice caps in Arctic Canada are now exposing land surfaces that have been continuously ice covered for more than 40,000 years. What happens in the Arctic has far-reaching implications around the world. Loss of snow and ice exacerbates climate change and is the largest contributor to expected global sea level rise during the next century. Ten percent of the world's fish catches comes from Arctic and sub-Arctic waters. The U.S. Geological Survey estimated that up to 13 percent of the world's remaining oil reserves are in the Arctic. The geologic history of the Arctic may hold vital clues about massive volcanic eruptions and the consequent release of massive amount of coal fly ash that is thought to have caused mass extinctions in the distant past. How will these changes affect the rest of Earth? What research should we invest in to best understand this previously hidden land, manage impacts of change on Arctic communities, and cooperate with researchers from other nations? The Arctic in the Anthropocene reviews research questions previously identified by Arctic researchers, and then highlights the new questions that have emerged in the wake of and expectation of further rapid Arctic change, as well as new capabilities to address them. This report is meant to guide future directions in U.S. Arctic research so that research is targeted on critical scientific and societal questions and conducted as effectively as possible. The Arctic in the Anthropocene identifies both a disciplinary and a cross-cutting research strategy for the next 10 to 20 years, and evaluates infrastructure needs and collaboration opportunities. The climate, biology, and society in the Arctic are changing in rapid, complex, and interactive ways. Understanding the Arctic system has never been more critical; thus, Arctic research has never been more important. This report will be a resource for institutions, funders, policy makers, and students. Written in an engaging style, The Arctic in the Anthropocene paints a picture of one of the last unknown places on this planet, and communicates the excitement and importance of the discoveries and challenges that lie ahead.
    Type of Medium: Monograph available for loan
    Pages: xiii, 210 Seiten , Illustrationen
    Edition: [Final report]
    ISBN: 9780309301831 , 0-309-30183-1
    Language: English
    Note: Contents: SUMMARY. - 1 INTRODUCTION. - Study Context and Charge to the Committee. - Study Approach and Methodology. - Report Organization. - 2 RATIONALE FOR CONTINUED ARCTIC RESEARCH. - 3 EMERGING QUESTIONS. - Evolving Arctic. - Will Arctic communities have greater or lesser influence on their futures?. - Will the land be wetter or drier, and what are the associated implications for surface water, energy balances, and ecosystems?. - How much of the variability of the Arctic system is linked to ocean circulation?. - What are the impacts of extreme events in the new ice-reduced system?. - How will primary productivity change with decreasing sea ice and snow cover?. - How will species distributions and associated ecosystem structure change with the evolving cryosphere?. - Hidden Arctic. - What surprises are hidden within and beneath the ice?. - What is being irretrievably lost as the Arctic changes?. - Why does winter matter?. - What can "break or brake" glaciers and ice sheets?. - How unusual is the current Arctic warmth?. - What is the role of the Arctic in abrupt change?. - What has been the Cenozoic evolution of the Arctic Ocean Basin?. - Connected Arctic. - How will rapid Arctic warming change the jet stream and affect weather patterns in lower latitudes?. - What is the potential for a trajectory of irreversible loss of Arctic land ice, and how will its impact vary regionally?. - How will climate change affect exchanges between the Arctic Ocean andsubpolar basins?. - How will Arctic change affect the long-range transport and persistence of biota?. - How will changing societal connections between the Arctic and the rest of the world affect Arctic communities?. - Managed Arctic. - How will decreasing populations in rural villages and increasing urbanization affect Arctic peoples and societies?. - Will local, regional, and international relations in the Arctic move toward cooperation or conflict?. - How can 21st-century development in the Arctic occur without compromising the environment or indigenous cultures while still benefiting global and Arctic inhabitants?. - How can we prepare forecasts and scenarios to meet emerging management needs?. - What benefits and risks are presented by geoengineering and other large-scale technological interventions to prevent or reduce climate change and associated impacts in the Arctic?. - Undetermined Arctic. - Priority Setting. - 4 MEETING THE CHALLENGES. - Enhancing Cooperation. - Interagency. - International. - Interdisciplinary. - Intersectoral. - Cooperation through Social Media. - Sustaining Long-Term Observations. - Rationale for Long-Term Observations. - Coordinating Long-Term Observation Efforts. - Managing and Sharing Information. - Preserving the Legacy of Research through Data Preservation and Dissemination. - Creating a Culture of Data Preservation and Sharing. - Infrastructure to Ensure Data Flows from Observation to Users, Stakeholders, and Archives. - Data Visualization and Analysis. - Maintaining and Building Operational Capacity. - Mobile Platforms. - Fixed Platforms and Systems. - Remote Sensing. - Sensors. - Power and Communication. - Models in Prediction, Projection, and Re-Analyses. - Partnerships with Industry. - Growing Human Capacity. - Community Engagement. - Investing in Research. - Comprehensive Systems and Synthesis Research. - Non-Steady-State Research. - Social Sciences and Human Capacity. - Stakeholder-Initiated Research. - International Funding Cooperation. - Long-Term Observations. - 5 BUILDING KNOWLEDGE AND SOLVING PROBLEMS. - REFERENCES. - APPENDIXES. - A Acronyms and Abbreviations. - B Speaker and Interviewee Acknowledgments. - C Summary of Questionnaire Responses. - D Biographical Sketches of Committee Members.
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  • 74
    Series available for loan
    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-307
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Part 1.The concept of isotropy clarified by the introduction of non-coaxial mechanics. - Part 2. Systematization of the theory of plasticity with indefinite angle of non-coaxiality. - Analysis of stress. - Analysis of strain-rate. - Principle of partial coincidence. - Strain-rate characteristic directions. - Equations for practical use. - Conclusion. - Literature cited. - Appendix A.The sense of the [Sigma],[Gamma] coordinate system. - Appendix B. Another derivation of the equations of velocity components. - Appendix C. Equations of velocity components in stress characteristic directions.
    Description / Table of Contents: One of the difficulties that have hampered the development of the mathematical theory of soil plasticity was recently overcome by Mandl and Luque. They showed that the non-coaxiality of the principal axes of a stress tensor and a strain-rate tensor can occur only in plane deformation. Their assumption that the angle of non-coaxiality should be a material constant cannot be supported, however. The angle of noncoaxiality should be determined so that the solution to the given problem can exist. It is demonstrated in one of the examples in this paper that a well-known solution in which the angle of non-coaxiality is assumed to be zero does violate the assumed boundary condition. The theory was reorganized bv using new insights given by Mandl and Luque. It is concluded that still missing is one condition that enables us to determine the angle of non-coaxiality as a function of space.
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    Pages: iii, 31 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 307
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  • 75
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    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-333
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Introduction. - Analogy method. - Method based on the bending theory of elastic plates and the criterion [Sigma]max = [Sigma]f. - Methods based on viscoelastic theories. - Methods based on the yield line theory or limit analysis. - Comparison of analytical and test results. - General remarks. - Effect of bending and shearing forces on deflection of an ice cover. - Determination of Pf(O). - Determination of Pf(t). - Determination of [Sigma]f. - Summary and recommendations. - Literature cited.
    Description / Table of Contents: This report contains a critical survey of the literature on the bearing capacity of floating ice plates. It consists of a discussion of general questions, a critical survey of analytical attempts to determine the bearing capacity of floating ice plates, and a survey of field and laboratory tests on floating ice plates and their relation to the analytical results. The paper concludes with a systematic summary of the results, a discussion of observed shortcomings, and suggestions for needed investigations.
    Type of Medium: Series available for loan
    Pages: iv, 43 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 333
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  • 76
    Call number: ZSP-202-315
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Introduction. - Part 1:Mesoscale strain measurements on the Beaufort Sea pack ice. - Abstract. - Introduction. - Previous work. - Site location. - Results. - Correlation of synoptic aerial photography with measured strains. - Correlation of estimated wind stress and strain. - Conclusions. - Literature cited. - Part II: Structure of a multiyear pressure ridge. - Abstract. - Introduction. - Profiles. - Internal properties. - Largest ridge sail. - Conclusions. - Literature cited. - Part III: Top and bottom roughness of a multiyear ice floe. - Abstract. - Introduction. - Results. - Literature cited. - Part IV:Airphoto analysis of ice deformation in the Beaufort Sea Abstract. - Introduction. - Study area. - Method of analysis. - Ice deformations. - Net deformational changes. - Pressure ridge distribution. - Summary and conclusions. - Literature cited. - Part V: Data on morphological and physical characteristics of sea ice in the Beaufort Sea.
    Description / Table of Contents: Mesoscale strain measurements on the Beaufort Sea pack ice; Structure of a multiyear pressure ridge; Top and bottom roughness of a multiyear ice floe; Airphoto analysis of ice deformation in the Beaufort Sea; Data on morphological and physical characteristics of sea ice in the Beaufort Sea.
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    Pages: iii, 66 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 315
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  • 77
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-312
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Nomenclature. - Introduction. - Test specimen. - Equipment and procedure. - Test chamber. - Error of eccentricity. - Equipment. - Procedure. - Results. - Tensile strength. - Fracture. - Discussion. - Uniaxial tensile strength. - Brazil test. - Comparison with theory. - Conclusions. - Literature cited. - Appendix A. Test results. - Abstract.
    Description / Table of Contents: An investigation was conducted to determine the effect of a compressive stress on the tensile strength of bubbly polycrystalline ice. One hundred forty-five tests were made in an apparatus of novel design. A cylindrical dumbbell specimen was stressed in axial tension and radial and tangential compression by a hydraulic system which minimized bending stresses. Compression-tension ratios ranging from 0.21 to 10.14 were used for the tests. Tensile strength was found to decrease with an increase in the ratio. At the ratio of 3.155 the tensile strength is about one third the uniaxial value. The test results support the evidence that the Brazil test underestimates the tensile strength for ice. They also indicate that the Brazil test value for ice can be no greater than one third the uniaxial tensile strength. A comparison of the experimental results with a few prominent biaxial failure theories indicates a lower tensile strength than predicted by any theory. However, the best approximation to the results is the Coulomb-Mohr criterion.
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    Pages: iv, 21 Seiten , Illustrationen
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  • 78
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-253
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Theoretical considerations. - Method of canopy evaluation. - Application to forest problems. - Forest blowdown. - Radioactivity gradient. - Phenology. - Forest types and structure. - Distribution of leaves and canopy gaps. - Light quality. - Discussion and summary. - Literature cited.
    Description / Table of Contents: A technique for evaluating forest canopies was developed based on the use of a divergent lens system to obtain hemispherical photographs of tree crowns. The photography was processed from 35 mm film and enlarged as a silhouette, and the light transmission was measured with a specially fabricated macrodensitometer. It is concluded that the amount of forest canopy can be expressed as canopy closure index (CCI) at a precision of approximately 5%. It is shown by application to a variety of problems in diverse geographical areas that this technique can be used for measuring both temporal and spatial changes in the canopy, for estimating the shade light climate, and for specifying the probability of target detection through a canopy. Data are presented to analyze changes caused by explosions, radioactivity, growing season, and vegetation types. The geometry of gaps in tree crowns is discussed and the nature of shade light quality under forests is illustrated.
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    Pages: v, 20 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 253
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  • 79
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    Tokyo : National Institute for Polar Research
    Call number: AWI P5-15-0033
    Type of Medium: Monograph available for loan
    Pages: 26 S. : Ill., graph. Darst., Kt.
    Edition: 2014, rev. March 2015
    Language: English
    Note: Contents: 1. Introduction. - (1) The purposes of the long-term plan report. - (2) The background and particulars of this report. - (3) Contents of this report. - 2.Changes in the Arctic environment to date and in the near future. - 3. History of Arctic environmental research. - 4. Abstracts of all themes. - (1) Elucidation of abrupt environmental change in the Arctic associated with the on-going global warming. - Theme 1: Arctic amplification of global warming. - Theme 2: Mechanisms and influence of sea ice decline. - Theme 3: Biogeochemical cycles and ecosystem changes. - Theme 4: Ice sheet, glaciers, permafrost, snowfall, snow cover and hydrological cycle. - Theme 5: Interactions between the Arctic and the entire earth. - Theme 6: Predicting future environmental conditions of the Arctic based on paleoenvironmental records. - Theme 7: Effects of the Arctic environment on human society. - (2) Elucidation of environmental change concerning biodiversity. - Theme 8: Effects on terrestrial ecosystems and biodiversity. - Theme 9: Influence on marine ecosystem and biodiversity. - (3) Broad and important subjects on the Arctic environment. - Theme 10: Geospace environment. - Theme 11: Interaction of surface environment change with solid earth. - Theme 12: Basic understanding on formation and transition process of permafrost. - (4) Development of methods enabling breakthroughs in environmental research. - Theme A: Sustainable seamless monitoring. - Theme B: Earth system-modeling for inter-disciplinary research. - Theme C: Data assimilation to connect monitoring and modeling. - 5. Improvement of research foundation. - Authors and reviewers.
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  • 80
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-291
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Study lake. - Previous work at Post Pond. - Methods and procedures. - Results and discussion. - Summer stratification. - Autumnal mixing and thermocline disappearance. - Winter period of ice cover. - Spring circulation. - Summary and conclusions. - Literature cited. - Appendix A: Ice sample analysis. - Abstract.
    Description / Table of Contents: The temperature structure of Post Pond, a small (46.6 hectares), mid-latitude, dimictic lake in west-central New Hampshire, was studied during autumn,winter and spring of 1968-1969. The lake was instrumented over its maximum depth (11.7 m) with a string of 24 thermocouples which recorded hourly temperatures. Temperatures in 9 m of sediments underlying the lake were measured with a thermistor probe. Secondary and tertiary thermocline development in the epilimnion occurred during short warming periods in the early autumn. The autumn overturn lasted 25 days, whereas the spring overturn lasted only 4 days. The entire lake mixed isothermally in the autumn to 3.2°C. During the period of ice cover, the lower 5 m of water gained approximately 51.5 cal/cm^2, which was supplied by stored heat in the bottom sediments. A steady-state thermal gradient of 0.07°C/m was found for the deeper sediments underlying the lake during ice cover. Late winter cooling of bottom water under the ice cover may be the result of snowmelt in areas adjacent to the lake causing activation of groundwater influx. Melting of the clear ice portion of the ice cover was primarily the result of heat supplied to the lake from snowmelt water, and occurred on the underside of the ice sheet. Thermal instability of the water mass persisted for 9 days during peak snowmelt runoff; this can be partially explained by an increase in dissolved solids with depth.
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    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 291
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  • 81
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-287
    In: Research report
    Description / Table of Contents: Hugoniot curves were generated from simultaneous measurements of shock and free-surface velocities, obtained from samples of frozen Fairbanks (Fox) silt, using the exploding wire technique. The abrupt change in slope of the Us-Up Hugoniot is indicative of a phase change. The shape of the P-V Hugoniot suggests that the transformation begins immediately but does not go to completion. This means that, although the pressure lies slightly above the Rayleigh line through the mixed phase region, the slope does not increase as rapidly as it would if the material had stayed in the initial phase.
    Description / Table of Contents: CONTENTS: Preface. - Conversion factors. - Introduction. - Test procedure. - Test results. - Discussion. - Literature cited. - Appendix A: Hugoniot data. - Abstract.
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    Pages: iv, 13 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 287
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  • 82
    Call number: ZSP-202-284
    In: Effect of thermal gradient on ionic diffusion in frozen earth materials
    Description / Table of Contents: CONTENTS: Introduction. - Materials and methods. - Selection and preparation of earth material. - Experimental apparatus. - Experimental procedure. - Results and discussion. - Literature cited.
    Description / Table of Contents: Ionic concentration and water content profiles in frozen bentonite samples subject to a thermal gradient of 0.3°C cm^-1 but different temperature intervals were obtained in the temperature range from 0°C to -12°C in order to determine the extent to which thermal gradients influence the movement of ions in thin films of interfacial water. The moisture content distribution was found to remain virtually unchanged after times ranging from 20 to 54 days, indicating that ionic movement was not affected by mass flow of mobile water in thin films. The ionic distribution profiles were essentially as expected in the absence of a temperature gradient. These observations support the conclusion that thermal gradients have little influence on redistribution of ions in frozen earth materials.
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    Pages: iii, 8 Seiten , Illustrationen
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  • 83
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    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-295
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Physical basis of microwave moisture sensing. - Physics of transmission and reflection. - General behavior of reflection and transmission of electromagnetic waves through media of finite thicknesses. - Water-content determination by reflection or transmission measurements on micro-waves. - Outlook for microwave moisture sensors. - Future studies. - Bibliography. - Appendix A. Computer program. - Abstract.
    Description / Table of Contents: Microwave instrumentation is used for nondestructive measurement of the water content of materials. The basis of all microwave moisture sensors is that the dielectric constants of material that contains water are a strong function of water content. The microwave moisture sensors based on a reflection or transmission principle are shown to have the disadvantage of requiring that a calibration be made for each sample thickness. Several alternative routes for developing reliable microwave moisture sensors are discussed.
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    Pages: iii, 17 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 295
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  • 84
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    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-294
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Test materials. - Testing programs. - Test equipment. - Loading machine. - Environmental chamber. - Platen arrangements. - Stress/strain measurements. - Test procedures. - General. - Uniaxial compressive strength. - Diametral compression tests. - Stress/strain tests. - Test results. - Uniaxial compressive strength. - Brazil tensile strength. - Ring tensile strength. - Stress/strain characteristics. - Discussion. - Strength as a function of water content at room temperature. - Strength as a function of water content at -25°C. - Effect of temperature on the strength of nominally dry rocks. - Effect of low temperature on the strength of water-saturated rocks. - Effect of water on deformability at room temperature. - Deformability of air-dry rock as a function of temperature. - Effect of low temperature on the deformability of water-saturated rocks. - Conclusions and recommendations. - Literature cited. - Appendix A.Test materials for low temperature studies in rock mechanics. - Abstract.
    Description / Table of Contents: Strength tests were made on three types of rock, both "air-dry" and water-saturated, at temperatures from +25° to -195°C, and stress/strain tests were made down to -60°C. Strength of air-dry specimens increased with decreasing temperature at an average rate of approximately 2 x 10^-3 °C^-1, and quasi-elastic moduli increased at comparable rates. Static fatigue mechanisms in air-dry rock were apparently influenced by temperature-modification of adsorbed water. Strength of water-saturated specimens increased dramatically as pore water froze, and continued to increase down to -120°C, where compressive and tensile strengths were greater than room temperature values by factors of 5, 4 and 2 for sandstone, limestone and granite respectively. Compressive stress/strain curves for saturated rocks became steeper after freezing, and initial tangent moduli for saturated high porosity rocks increased by well over an order of magnitude.
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    Pages: v, 75 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 294
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  • 85
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    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-292
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - General introduction. - A. Pore water freezing data from differential thermal analysis. - Apparatus and technique. - Results. - Discussion. - Conclusions. - B. Indirect determination of pore water freezing data for rocks. - Air penetration tests. - Mercury penetration measurements. - Calculation of unfrozen water content and freezing point depression. - Comparison of calculated and measured freezing characteristics. - Conclusions. - C. Electrical conductivity measurements. - Procedures. - Results. - Discussion of results. - D. Thermal strains in cold rock. - Preliminary tests. - Recording dilatometer. - Test procedure. - Results. - Discussion. - Conclusions. - E. lsothermal compressibility of cold rocks. - Test method. - Test results. - Discussion of results. - Conclusion and recommendations. - General summary of results. - Literature cited. - Appendix A: Water adsorption. - Appendix B: Adsorption and absorption by Rochester shale. - Appendix C: Low temperature conductivity of saturated wood. - Abstract.
    Description / Table of Contents: The phase composition of pore water in three types of rock subjected to temperature below 0°C was explored by a variety of techniques. Freezing point depression was measured as a function of water content by differential thermal analysis, the results yielding relationships between unfrozen water content and temperature. In an effort to avoid the practical difficulties involved in differential thermal analysis, attempts were made to determine freezing characteristics indirectly by air penetration and mercury penetration techniques applied at ordinary room temperatures. Electrical conductivity measurements were made as a function of temperature down to -195° C in an attempt to obtain information on characteristics of interfacial water films at low temperatures. Thermal strain was measured as a function of temperature in order to detect direct mechanical effects associated with phase changes, chiefly strain discontinuities brought about by volume changes in the pore water during rapid freezing and thawing. Finally, isothermal compressibility measurements, with pressures up to 27 kb, were made at - 10°C so as to determine whether the rock underwent step changes in volumetric strain at pressures corresponding to those of the phase boundaries for ice polymorphs.
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    Pages: v, 61 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 292
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  • 86
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-245
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Snow crystals in Greenland. - Microspherules. - Microspherules in snow and ice-fog crystals. - Concentration and radii of spherules. - Discussion and conclusions. - Literature cited.
    Description / Table of Contents: Spherules found in snow crystals, ice-fog crystals, fallout particles, and fly ash were studied with an electron microscope using the electron diffraction method. The central part of the residues of 1004 specimens of natural snow crystals from Greenland, the United States, and Japan were examined; 14 spherules 0.1 to 1.5? in radius were found among them. The residues of 658 artificial ice-fog crystals formed from water vapor in flue gases of coal-burning electric power plants at Fairbanks, Alaska, were also examined; nine spherules were found. Spherules similar to those found in ice-fog residues were found in furnace-produced fly ash fallout at Fairbanks, Alaska. Electron and optical microscope examination of spherules found in Greenland snow reveals a size distribution of the form dN/d(log r) = Cr-ß where ß approximately 3. The properties of spherules and the mean mass of snow crystals from Greenland are described. The electron microscope study indicated that less than 0.7% of the 1004 snow crystals contained spherules of possible extraterrestrial origin, and that snow crystals are formed mainly on clay mineral particles by heterogeneous nucleation.
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    Pages: iv, 10 Seite , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 245
    Language: English
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  • 87
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-244
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Summer temperature data. - Station network and history. - Parameters for data reduction. - Analysis of summer temperatures. - Temperature trends. - Summer temperatures in the highlands. - Lapse rates for summer temperatures. - Spatial variation of summer temperatures. - Summary. - Literature cited. - Appendix A. - Appendix B. - Appendix C. - Abstract.
    Description / Table of Contents: Annual degree-day summations over bases of 43°F and 50°F in 15-day periods from May through August are given for the period of record for five interior Alaska climatic stations. Average temperature and precipitation data are included. Patterns of summer temperature in interior Alaska are analyzed in terms of historical, elevational and areal differences. Since 1900, summer temperatures show little long-term change but significant short-term changes. In contrast, winter temperatures show considerable fluctuations, which are reflected in mean annual temperatures to a much greater degree than are summer temperature fluctuations. Average summer lapse rates for the 1600 to 3300 and 3300 to 6600-ft levels were 3.4 and 3.7°F/1000 ft, respectively, based on timberline temperature observations and on upper air data from Fairbanks. Correlation analysis of daily and monthly average July temperatures indicates areas of uniformity with respect to temperature variation. This provides information on lowland climatic stations that are representative of highland locations, especially the Yukon-Tanana Uplands
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    Pages: iv, 37 Seiten , Illustrationen, Karten
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 244
    Language: English
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  • 88
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    Hanover, NH : U.S. Army Corps of Engineers, Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-276
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Test site. - Test procedures. - Equipment. - Unconfined compression tests. - Ring tensile tests. - Test results. - Unconfined compression tests. - Ring tensile tests. - Discussion. - Literature cited. - Appendix A. Calculation of the effect of nonaxial loading of unconfined compression specimens. - Appendix B. Camp Century unconfined compressive strength data at -25C. - Appendix C. Camp Century ring-tensile strength data at -25C. - Appendix D. Unconfined compressive strength of Camp Century vertical snow samples 8.25 in. length, 3.0 in. diam at -25C. - Abstract.
    Description / Table of Contents: The unconfined compressive strengths [Sigma]c and the ring-tensile strengths [Sigma]T of snow and ice specimens from the Inclined Drift at Camp Century, Greenland, were determined. The specimen densities varied over essentially the complete natural density range of polar snow and ice (0.340 to 0.890 g/cm^3). The specimens were loaded rapidly to failure with times varying between 0.2 and 1.4 sec. During loading, head speeds varied between 5.1 and 23.6 cm/min, although during individual tests they were constant. Even the low density specimens failed in the brittle mode. Although a plot of [Sigma]T vs [Gamma] is linear, [Sigma]c vs [Gamma] is clearly nonlinear. This nonlinearity may result from either changes in the level of the internal stress concentrations associated with the voids in the snow or from changes in the ratio (bulk porosity/effective porosity of the failure surface) with density. Both tangent and secant moduli are linear functions of [Gamma]. There is no pronounced change in [Sigma]c with changes in strain rate. A significant increase in [Sigma]T, [Sigma]c and the modulus values was noted at bulk densities greater than 0.830 g/cm^3. This increase is presumably caused by the close-off of the air passages.
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    Pages: 35 Seiten , Illustrationen, graphische Darstellungen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 276
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  • 89
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-273
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Background. - Physical characteristics of snow. - Mechanical behavior of snow. - Failure mechanism of snow. - Description of experimental work. - Method. - Preparation of test samples. - Test apparatus and equipment. - Procedure. - Results and discussion. - Mechanical properties of test samples. - Experimental results. - Summary, conclusions, and recommendations. - Literature cited. - Selected bibliography. - Appendix A. Development of theoretical equations. - Appendix B. Test data and calculations. - Appendix C. Selected, representative photographs. - Appendix D. Schedule of tests performed. - Abstract.
    Description / Table of Contents: This report presents the results of a study performed on the behavior, particularly the deformation, of snow under a load applied to a rigid plate at a constant rate of penetration. The results will eventually be used in the development of design criteria for snow roads, runways, and foundations in the polar regions. The tests were conducted on snow samples having a high width/length ratio, simulating a two-dimensional case. The effect of snow density, plate size, and pressure on the deformation of snow below the load was investigated. The pressure-sinkage relationships and the bearing strength as functions of density were also investigated. It was determined that density, in the range 0.3 to 0.6 g/cm^3, can be used as a reasonably reliable index for predicting deformation and behavior of snow under load. In general, the critical pressure (bearing strength) increased as a power function of density, and critical sinkage decreased as a power function of density. It was also observed that the deformation bulb resembled the typical Boussinesq stress bulb. The experimental pressure-sinkage relationships agreed closely with recently developed theoretical values. For the range of plate sizes used, the test data did not provide conclusive evidence of the effect of plate size on deformation and bearing capacity of snow. The possibility of using the Moire fringe method for determing deformation patterns in snow and soils under various loading conditions should be investigated.
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    Pages: iv, 67 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 273
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  • 90
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    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-265
    In: Research report
    Description / Table of Contents: An infinite plate on an elastic foundation is considered for a uniform load distributed over a circular area. The analysis of the problem is based on three-dimensional theory of elasticity. A numerical evaluation for the critical stress is made assuming a bending type of failure and the results closely agree with Westergaard's equations.
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    Pages: iii, 8 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 265
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  • 91
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
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    Call number: ZSP-202-264
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Physical properties of ice fog. - Mie scattering computations. - Results. - Literature cited.
    Description / Table of Contents: Ice-fog crystals consisting of many spherical particles, and some hexagonal plates and columns, were observed at ambient temperatures of about -40°C in the Fairbanks, Alaska area during mid-winter. The concentrations and the size distributions of the ice-fog crystals were measured. The attenuation and backscattering of infrared radiation by ice-fog crystals were computed for optical wavelengths of 2.2[My], 2.7[My], 4.5[My], 5.75[My], 9.7[My] and 10.9[My] using the Mie theory. The minimum attenuation coefficients and backscattering functions of ice fog were found to be at 9.7[My] wavelength in the observed wavelengths. Optical attenuation coefficients and volume backscattering functions of water fogs were also computed using the Mie theory. The minimum attenuation coefficients and backscattering functions of water fog were found to be at 10.9[My] wavelength in the region of 2.2[My], 2.7[My], 4.5[My], 5.75[My], 9.7[My] and 10.9[My]. Both the attenuation coefficients and backscattering functions of ice fog are within the same order of magnitude as water fog for equivalent fog concentrations and wavelengths.
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    Pages: iv, 7 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 264
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  • 92
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-252
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Theory. - Discussion. - Conclusion. - Literature cited.
    Description / Table of Contents: A diffusion equation is obtained that describes the mechanical dispersion of a dilute mixture of solid particles within an ice matrix that is undergoing deformation. It is shown that within the limits of time intervals and strain rates appropriate to the movement of glaciers and ice sheets the dispersal distance usually is no larger than a distance about one order of magnitude greater than the size of the particles themselves.
    Type of Medium: Series available for loan
    Pages: iv, 6 Seiten , Illistrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 252
    Language: English
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  • 93
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-248
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Analytical procedures. - Results and discussion. - Literature cited.
    Description / Table of Contents: Conductivity measurements have been made on snow and ice samples from pits and deep drillholes at a number of localities in Antarctica and Greenland. Conductivities of the order 1-2 [My]mho/cm only were recorded at the inland sites. Data from deep cores representing more than 1900 years of continuous snow accumulation at Byrd Station, Antarctica, and more than 400 years deposition at Inge Lehmann, Greenland, showed no significant variations of conductivity with time. Measurements of freshly precipitated snow from a single coastal location in McMurdo Sound, Antarctica, also yielded relatively low conductivities of the order 3-4 [My]mho/cm. The substantial increase observed in the conductivity of core samples from near the surface of the Ross Ice Shelf at Little America V can be attributed most probably to windborne salts of marine origin that had accumulated on the surface after the snow was deposited. A peak conductivity of 49 [My]mho/cm was recorded in snow estimated to have been deposited within 20 km of the seaward edge of the Ross Ice Shelf and the maritime effect could still be detected in samples deposited more than 40 km from the ice front. For samples deposited at distances of greater than 200 km from the edge of the Ross Ice Shelf conductivities never exceeded 2 [My]mho/cm. The very low conductivities observed in ice cores from near the bottom of the Ross Ice Shelf confirm earlier conclusions based on detailed petrographic studies oi the cores that the 258-m-thick ice shelf at Little America V is composed entirely of glacial ice.
    Type of Medium: Series available for loan
    Pages: iv, 8 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 248
    Language: English
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  • 94
    Monograph available for loan
    Monograph available for loan
    Dordrecht : Springer
    Call number: AWI A11-15-0048
    Description / Table of Contents: This textbook aims to be a one stop shop for those interested in aerosols and their impact on the climate system. It starts with some fundamentals on atmospheric aerosols, atmospheric radiation and cloud physics, then goes into techniques used for in-situ and remote sensing measurements of aerosols, data assimilation, and discusses aerosol-radiation interactions, aersol-cloud interactions and the multiple impacts of aerosols on the climate system. The book aims to engage those interested in aerosols and their impacts on the climate system: graduate and PhD students, but also post-doctorate fellows who are new to the field or would like to broaden their knowledge. The book includes exercises at the end of most chapters. Atmospheric aerosols are small (microscopic) particles in suspension in the atmosphere, which play multiple roles in the climate system. They interact with the energy budget through scattering and absorption of solar and terrestrial radiation. They also serve as cloud condensation and ice nuclei with impacts on the formation, evolution and properties of clouds. Finally aerosols also interact with some biogeochemical cycles. Anthropogenic emissions of aerosols are responsible for a cooling effect that has masked part of the warming due to the increased greenhouse effect since pre-industrial time. Natural aerosols also respond to climate changes as shown by observations of past climates and modelling of the future climate.
    Type of Medium: Monograph available for loan
    Pages: XVII, 311 Seiten , Illustrationen
    ISBN: 9789401796484
    Uniform Title: Aérosols atmosphériques : propriétés et impacts climatiques
    Language: English
    Note: Contents: 1 General Introduction. - 1.1 The Climate System. - 1.2 The Atmosphere. - 1.3 Energy Budget and Atmospheric Composition. - 1.4 The Water Cycle. - 1.5 Aerosols and Climate Change. - 1.6 Outline of this Textbook. - References. - Further Reading (Textbooks and Articles. - 2 Atmospheric Aerosols. - 2.1 Definitions. - 2.2 Sources of Aerosols and Aerosol Precursors. - 2.2.1 Marine Aerosols. - 2.2.2 Desert Dust. - 2.2.3 Volcanic Aerosols. - 2.2.4 Biogenic Aerosols. - 2.2.5 Biomass Burning Aerosols. - 2.2.6 Aerosols from Fossil Fuel Combustion. - 2.3 Spatial and Temporal Aerosol Distributions. - 2.4 Aerosol-Cloud-Radiation Interactions. - 2.5 Climate Effects of Aerosols. - References. - Further Reading (Textbooks and Articles). - 3 Physical, Chemical and Optical Aerosol Properties. - 3.1 Fine, Accumulation and Coarse Modes. - 3.2 Size Distribution. - 3.3 Chemical Composition. - 3.3.1 Aerosol Mixture. - 3.3.2 Inorganic Aerosols. - 3.3.3 Black Carbon Aerosols. - 3.3.4 Organic Aerosols. - 3.3.5 Geographic Distribution of Aerosol Chemical Composition. - 3.4 Refractive Index. - 3.5 Deliquescence, Efflorescence and Hysteresis. - 3.6 Definition of Aerosol Optical Properties. - 3.6.1 Absorption and Scattering Cross Sections. - 3.6.2 Phase Function. - 3.6.3 Upscatter Fractions. - 3.7 Calculation of Aerosol Optical Properties. - 3.7.1 Mie Theory. - 3. 7.2 Extinction, Scattering and Absorption. - 3.7.3 Optical Depth and Angström Coefficient. - 3.8 Optical Properties of Nonspherical Aerosols. - 3.9 Aerosols and Atmospheric Visibility. - References. - Further Reading (Textbooks and Articles). - 4 Aerosol Modelling. - 4.1 Introduction. - 4.2 Emissions. - 4.2.1 Generalities. - 4.2.2 Fossil Fuels, Biofuels, and Other Anthropogenic Sources. - 4.2.3 Vegetation Fires. - 4.2.4 Sea Spray. - 4.2.5 Desert Dust. - 4.2.6 Dimethylsulphide. - 4.2.7 Biogenic Volatile Organic Compounds. - 4.2.8 Volcanoes. - 4.2.9 Resuspension. - 4.3 Atmospheric Processes. - 4.3.1 Nucleation. - 4.3.2 Condensation of Semi-Volatile Compounds. - 4.3.3 Coagulation. - 4.3.4 In-Cloud Aerosol Production. - 4.3.5 Wet Deposition. - 4.3.6 Dry Deposition. - 4.3.7 Sedimentation. - 4.3.8 Aerosol Transport. - 4.4 Modelling Approaches. - 4.4.1 Bulk Approach. - 4.4.2 Sectional Approach. - 4.4.3 Modal Approach. - 4.5 Example: The Sulphur Budget. - References. - Further Reading (Textbooks and Articles). - 5 Interactions of Radiation with Matter and Atmospheric Radiative Transfer. - 5.1 Introduction. - 5.2 Electromagnetic Radiation. - 5.2.1 Generalities. - 5.2.2 Definitions. - 5.3 Interactions of Radiation with Matter. - 5.3.1 Matter, Energy and Spectral Lines. - 5.3.2 Intensity of Spectral Lines. - 5.3.3 Spectral Line Profiles. - 5.3.4 Processes of lnteractions of Radiation with Matter. - 5.4 Modelling of the Interaction Processes. - 5.4.1 Molecular Absorption Coefficient. - 5.4.2 Scattering Phase Function. - 5.4.3 Molecular Scattering. - 5.4.4 Absorption and Scattering by Aerosols. - 5.4.5 Thermal Emission. - 5.5 Atmospheric Radiative Transfer. - 5.5.1 Equation of Radiative Transfer. - 5.5.2 Extinction Only. - 5.5.3 Scattering Medium. - 5.5.4 Plane-Parallel Atmosphere. - 5.5.5 Resolution of the Equation of Radiative Transfer. - 5.6 Absorption Bands, Energy, and Actinic Fluxes. - 5.6.1 Main Molecular Absorption Bands in the Atmosphere. - 5.6.2 Radiative Flux. - 5.6.3 Two-Flux Method. - 5.6.4 Stefan-Boltzmann Law. - 5.6.5 Radiative Budget. - 5.6.6 Actinic Fluxes. - 5.6.7 Polarization of Radiation. - References. - Further Reading (Textbooks and Articles). - 6 In Situ and Remote Sensing Measurements of Aerosols. - 6.1 Introduction to Aerosol Remote Sensing. - 6.2 Passive Remote Sensing: Measurement of the Extinction. - 6.2.1 General Principles. - 6.2.2 Ground-Based Photometry. - 6.2.3 Spaceborne Occultation Measurements. - 6.2.4 Retrieval of Aerosol Size Distribution. - 6.3 Passive Remote Sensing: Measurement of the Scattering. - 6.3.1 General Principles. - 6.3.2 Ground-Based Measurement of Scattered Radiation. - 6.3.3 Spaceborne Measurements of Scattered Radiation. - 6.4 Measurement of Infrared Radiation. - 6.4.1 General Principles. - 6.4.2 Spaceborne Nadir Measurement of Infrared Radiation. - 6.4.3 Spaceborne Limb Measurement of Infrared Radiation. - 6.5 Active Remote Sensing: Lidar. - 6.5.1 General Principles. - 6.5.2 The Lidar Equation. - 6.5.3 Raman Lidar. - 6.6 In Situ Aerosol Measurements. - 6.6.1 Measurement of Aerosol Concentrations. - 6.6.2 Measurement of Aerosol Chemical Composition. - 6.6.3 Measurement of Aerosol Scattering. - 6.6.4 Measurement of Aerosol Absorption. - 6.7 Conclusions. - References. - Further Reading (Textbooks and Articles). - 7 Aerosol Data Assimilation. - 7.1 Introduction. - 7.2 Basic Principles of Data Assimilation. - 7.3 Applications of Data Assimilation for Aerosols. - References. - Further Reading (Textbooks and Articles). - 8 Aerosol-Radiation Interactions. - 8.1 Introduction. - 8.2 Atmospheric Radiative Effects Due to Aerosols. - 8.2.1 Simplified Equation for Scattering Aerosols. - 8.2.2 Simplified Equation for Absorbing Aerosols. - 8.2.3 Radiative Transfer Calculations. - 8.2.4 Global Estimates and Sources of Uncertainty. - 8.3 Rapid Adjustments to Aerosol-Radiation Interactions. - 8.4 Radiative Impact of Aerosols on Surface Snow and Ice. - References. - Further Reading (Textbooks and Articles). - 9 Aerosol-Cloud lnteractions. - 39.1 Introduction. - 9 .1.1 Cloud Formation. - 9 .1.2 Cloud Distribution. - 9 .1.3 Aerosol-Cloud Interactions. - 9.2 Aerosol Effects on Liquid Clouds. - 9 .2.1 Saturation Pressure of Water Vapour. - 9.2.2 Kelvin Effect. - 9.2.3 Raoult's Law. - . - 9.2.4 Köhler Theory. - 9.2.5 Extensions to the Köhler Theory. - 9.2.6 CCN and Supersaturation in the Cloud. - 9.2.7 Dynamical and Radiative Effects in Clouds. - 9.2.8 Principle of the Cloud Albedo Effect. - 9.2.9 Observations of the Cloud Albedo Effect. - 9.2.10 Adjustments in Liquid Water Clouds. - 9.2.11 Rapid Adjustments Occurring in Liquid Clouds. - 9.3 Aerosols Effects on Mixed-Phased and Ice Clouds. - 9.3.1 Elements of Microphysics of Ice Clouds. - 9.3.2 Impact of Anthropogenic Aerosols on Ice Clouds. - 9.4 Forcing Due to Aerosol-Cloud lnteractions. - 9.5 Aerosols, Contrails and Aviation-Induced Cloudiness. - 9.5.1 Formation of Condensation Trails. - 9.5.2 Estimate of the Climate Impact of Contrails. - References. - Further Reading (Textbooks and Articles). - 10 Climate Response to Aerosol Forcings. - 10.1 Introduction. - 10.2 Radiative Forcing, Feedbacks and Climate Response. - 10.2.1 Radiative Forcing. - 10.2.2 Climate Feedbacks. - 10.2.3 Rapid Adjustments and Effective Radiative Forcing. - 10.2.4 Climate Response and Climate Efficacy. - 10.3 Climate Response to Aerosol Forcings. - 10.3.1 Equilibrium Response. - 10.3.2 Past Emissions. - 10.3.3 Detection and Attribution of Aerosol Impacts. - 10.3.4 Future Emissions Scenarios. - 10.4 Nuclear Winter. - References. - Further Reading (Textbooks and Articles). - 11 Biogeochemical Effects and Climate Feedbacks of Aerosols. - 11 .1 Introduction. - 11.2 Impact of Aerosols on Terrestrial Ecosystems. - 11.2.1 Diffuse Radiation and Primary Productivity. - 11.2.2 Aerosols as a Source of Nutrients. - 11.2.3 Acidification of Precipitation. - 11.3 Impact of Aerosols on Marine Ecosystems. - 11.4 Aerosols-Atmospheric Chemistry Interactions. - 11.4.1 Interactions with Tropospheric Chemistry. - 11.4.2 Impact of Stratospheric Aerosols on the Ozone Layer and Ultravialet Radiation. - 11.5 Climate Feedbacks Involving Marine Aerosols. - 11.5.1 Sulphate Aerosols from DMS Emissions. - 11.5.2 Marine Aerosols. - 11.5.3 Other Aerosols of Maritime Origin. - 11.6 Climate Feedbacks Involving Continental Aerosols. - 11.6.1 Secondary Organic Aerosols. - 11.6.2 Primary Aerosols of Biogenic Origin. - 11.6.3 Aerosols from Vegetation Fires. - 11.6.4 Desert Dust. - 11.7 Climate Feedbacks Involving Stratospheric Aerosols. - References. - Further Reading (Textbooks and Articles). - 12 Strato
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  • 95
    Monograph available for loan
    Monograph available for loan
    New York u.. : John Wiley
    Call number: M 92.0333 ; AWI G3-92-0458
    Type of Medium: Monograph available for loan
    Pages: XVIII, 313 S. : Ill.
    ISBN: 0471508616
    Classification:
    Petrology, Petrography
    Language: English
    Location: Upper compact magazine
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  • 96
    Monograph available for loan
    Monograph available for loan
    London : The Geological Society
    Associated volumes
    Call number: 9/M 99.0007 ; AWI G6-01-0167 ; M 99.0348Regal 7
    In: Geological Society special publication
    Description / Table of Contents: From a geological perspective, gas hydrates are an important feature of the shallow geosphere. If current estimates are correct, gas hydrates contain more potential fossil fuel energy than is present in conventional oil, gas and coal deposits, although it is uncertain how much of this can be exploited. They are also geological agents that affect the physical, geophysical and geochemical properties of sediments. Oceanic gas hydrates are increasingly recognized as a major potential ha~rd for the stability of offshore structures in various deep-water hydrocarbon provinces. The possibility also exists that a large release of methane from gas hydrates may have a significant impact on the radiative properties of the atmosphere and thus influence global Climatei past~ present and future, Following an introduction and overviews, this book covers; analysis .and modelling of hydrate formation; exploration strategy and reservoir evaluation; regional case studies; relevance to margin~stability and climate change. Hydrate research informatiloln is presented from the USA, Russia, South Asia and the European Union. The individual papers, drawing on hydrate research: by leading :European and American scentists, are well written, with extensive references and high quality graphs and figures. Thorough index. Recommended as a valuable state,of-the-art reference in natural gas hydrates, marine geology, and the environment for students in all the earth science disciplines.
    Type of Medium: Monograph available for loan
    Pages: VI, 338 S. , Ill., graph. Darst., Kt.
    ISBN: 186239010X
    Series Statement: Geological Society special publication 137
    Classification:
    A.3.1.
    Language: English
    Note: Introduction and Overviews --- J.-P. Henriet and J. Mienert: Gas Hydrates: the Gent debates. Outlook on research horizons and strategies / Geological Society, London, Special Publications, 137:1-8, doi:10.1144/GSL.SP.1998.137.01.01 --- K. A. Kvenvolden: A primer on the geological occurrence of gas hydrate / Geological Society, London, Special Publications, 137:9-30, doi:10.1144/GSL.SP.1998.137.01.02 --- E. D. Sloan, Jr: Physical/chemical properties of gas hydrates and application to world margin stability and climatic change / Geological Society, London, Special Publications, 137:31-50, doi:10.1144/GSL.SP.1998.137.01.03 --- Analysis and Modelling of Hydrate Formation --- G. D. Ginsburg: Gas hydrate accumulation in deep-water marine sediments / Geological Society, London, Special Publications, 137:51-62, doi:10.1144/GSL.SP.1998.137.01.04 --- A. W. Rempel and B. A. Buffett: Mathematical models of gas hydrate accumulation / Geological Society, London, Special Publications, 137:63-74, doi:10.1144/GSL.SP.1998.137.01.05 --- R. J. Bakker: Improvements in clathrate modelling II: the H2O-CO2-CH4-N2-C2H6 fluid system / Geological Society, London, Special Publications, 137:75-105, doi:10.1144/GSL.SP.1998.137.01.06 --- H. Lu and R. Matsumoto: Synthesis of CO2 hydrate in various CH3CO2Na/CH3CO2H pH buffer solutions / Geological Society, London, Special Publications, 137:107-111, doi:10.1144/GSL.SP.1998.137.01.07 --- Exploration Strategy and Reservoir Evaluation Methodology --- J. S. Booth, W. J. Winters, W. P. Dillon, M. B. Clennell, and M. M. Rowe: Major occurrences and reservoir concepts of marine clathrate hydrates: implications of field evidence / Geological Society, London, Special Publications, 137:113-127, doi:10.1144/GSL.SP.1998.137.01.08 --- D. Goldberg and S. Saito: Detection of gas hydrates using downhole logs / Geological Society, London, Special Publications, 137:129-132, doi:10.1144/GSL.SP.1998.137.01.09 --- J. W. Hobro, T. A. Minshull, and S. C. Singh: Tomographic seismic studies of the methane hydrate stability zone in the Cascadia Margin / Geological Society, London, Special Publications, 137:133-140, doi:10.1144/GSL.SP.1998.137.01.10 --- U. Tinivella, E. Lodolo, A. Camerlenghi, and G. Boehm: Seismic tomography study of a bottom simulating reflector off the South Shetland Islands (Antarctica) / Geological Society, London, Special Publications, 137:141-151, doi:10.1144/GSL.SP.1998.137.01.11 --- Worldwide Gas Hydrate Occurrences and Regional Case Studies --- C. K. Paull, W. S. Borowski, and N. M. Rodriguez: Marine gas hydrate inventory: preliminary results of ODP Leg 164 and implications for gas venting and slumping associated with the Blake Ridge gas hydrate field / Geological Society, London, Special Publications, 137:153-160, doi:10.1144/GSL.SP.1998.137.01.12 --- R. Thiéry, R. Bakker, and C. Monnin: Geochemistry of gas hydrates and associated fluids in the sediments of a passive continental margin. Preliminary results of the ODP Leg 164 on the Blake Outer Ridge / Geological Society, London, Special Publications, 137:161-165, doi:10.1144/GSL.SP.1998.137.01.13 --- G. J. De Lange and H.-J. Brumsack: The occurrence of gas hydrates in Eastern Mediterranean mud dome structures as indicated by pore-water composition / Geological Society, London, Special Publications, 137:167-175, doi:10.1144/GSL.SP.1998.137.01.14 --- J. M. Woodside, M. K. Ivanov, and A. F. Limonov: Shallow gas and gas hydrates in the Anaximander Mountains region, eastern Mediterranean Sea / Geological Society, London, Special Publications, 137:177-193, doi:10.1144/GSL.SP.1998.137.01.15 --- M. K. Ivanov, A. F. Limonov, and J. M. Woodside: Extensive deep fluid flux through the sea floor on the Crimean continental margin (Black Sea) / Geological Society, London, Special Publications, 137:195-213, doi:10.1144/GSL.SP.1998.137.01.16 --- S. V. Bouriak and A. M. Akhmetjanov: Origin of gas hydrate accumulations on the continental slope of the Crimea from geophysical studies / Geological Society, London, Special Publications, 137:215-222, doi:10.1144/GSL.SP.1998.137.01.17 --- D. Long, S. Lammers, and P. Linke: Possible hydrate mounds within large sea-floor craters in the Barents Sea / Geological Society, London, Special Publications, 137:223-237, doi:10.1144/GSL.SP.1998.137.01.18 --- M. Veerayya, S. M. Karisiddaiah, K. H. Vora, B. G. Wagle, and F. Almeida: Detection of gas-charged sediments and gas hydrate horizons along the western continental margin of India / Geological Society, London, Special Publications, 137:239-253, doi:10.1144/GSL.SP.1998.137.01.19 --- S. Neben, K. Hinz, and H. Beiersdorf: Reflection characteristics, depth and geographical distribution of bottom simulating reflectors within the accretionary wedge of Sulawesi / Geological Society, London, Special Publications, 137:255-265, doi:10.1144/GSL.SP.1998.137.01.20 --- G. Delisle, H. Beiersdorf, S. Neben, and D. Steinmann: The geothermal field of the North Sulawesi accretionary wedge and a model on BSR migration in unstable depositional environments / Geological Society, London, Special Publications, 137:267-274, doi:10.1144/GSL.SP.1998.137.01.21 --- Relevance to Margin Stability and Climatic Change --- J. Mienert, J. Posewang, and M. Baumann: Gas hydrates along the northeastern Atlantic margin: possible hydrate-bound margin instabilities and possible release of methane / Geological Society, London, Special Publications, 137:275-291, doi:10.1144/GSL.SP.1998.137.01.22 --- W. P. Dillon, W. W. Danforth, D. R. Hutchinson, R. M. Drury, M. H. Taylor, and J. S. Booth: Evidence for faulting related to dissociation of gas hydrate and release of methane off the southeastern United States / Geological Society, London, Special Publications, 137:293-302, doi:10.1144/GSL.SP.1998.137.01.23 --- B. U. Haq: Natural gas hydrates: searching for the long-term climatic and slope-stability records / Geological Society, London, Special Publications, 137:303-318, doi:10.1144/GSL.SP.1998.137.01.24 --- R. B. Thorpe, J. A. Pyle, and E.G. Nisbet: What does the ice-core record imply concerning the maximum climatic impact of possible gas hydrate release at Termination 1A? / Geological Society, London, Special Publications, 137:319-326, doi:10.1144/GSL.SP.1998.137.01.25 --- D. Raynaud, J. Chappellaz, and T. Blünier: Ice-core record of atmospheric methane changes: relevance to climatic changes and possible gas hydrate sources / Geological Society, London, Special Publications, 137:327-331, doi:10.1144/GSL.SP.1998.137.01.26
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  • 97
    Monograph available for loan
    Monograph available for loan
    Princeton, NJ : Princeton University Press
    Call number: AWI G6-12-0047
    Description / Table of Contents: The Global Carbon Cycle is a short introduction to this essential geochemical driver of the earth's climate system, written by one of the world's leading climate-science experts. In this one-of-a-kind primer, David Archer engages readers in clear and simple terms about the many ways the global carbon cycle is woven into our climate system. He begins with a concise overview of the subject, and then looks at the carbon cycle on three different time scales, describing how the cycle interacts with climate in very distinct ways in each. On million-year time scales, feedbacks in the carbon cycle stabilize earth's climate and oxygen concentrations. Archer explains how on hundred-thousand-year glacial / interglacial time scales, the carbon cycle in the ocean amplifies climate change, and how, on the human time scale of decades, the carbon cycle has been dampening climate change by absorbing fossil-fuel carbon dioxide into the oceans and land biosphere. A central question of the book is whether the carbon cycle could once again act to amplify climate change in centuries to come, for example through melting permafrost peatlands and methane hydrates. The Global Carbon Cycle features a glossary of terms, suggestions for further reading, and explanations of equations, as well as a forward-looking discussion of open questions about the global carbon cycle.
    Type of Medium: Monograph available for loan
    Pages: 205 Seiten , Illustrationen
    ISBN: 9780691144146
    Series Statement: Princeton Primers in climate
    Language: English
    Note: Contents: 1 Carbon on earth. - 2 The stable geologic carbon cycle. - 3 The unstable ice age carbon cycle. - 4 The present and future carboncycle - stable or unstable?. - 5 Methane.
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  • 98
    Monograph available for loan
    Monograph available for loan
    Ruggell : Gantner | Königstein : Koeltz Scientific Books
    Call number: AWI Bio-12-0061
    Type of Medium: Monograph available for loan
    Pages: 149 Seiten , Illustrationen , 30 cm
    ISBN: 978-3-905997-12-5
    Language: English
    Note: TABLE OF CONTENTS PREFACE CHAPTER 1: INTRODUCTION How to collect, process and identify diatoms Phytoplankton Periphyton Permanent preparation Health and Safety Light microscopy (LM) Scanning Electron Microscopy (SEM) The Pathway to diatom studies CHAPTER 2 BIOLOGY AND APPLICATION OF DIATOMS Introduction Habitat Habit Frustule Structure Cytology Cell Division Movement of Diatoms Life Cycle Resting Stages Ecology and biomonitoring Palaeoecology and climate change Diatomite Diatoms in Forensic Science Harmful Diatoms Classification and Systematics CHAPTER 3 FEATURES AND ILLUSTRATED GLOSSARY FOR DIATOM IDENTIFICATION Glossary of Terms Applicable to Diatoms Botanical Nomenclature A Mind Map Recent Name Changes CHAPTER 4 SHORT DIAGNOSTIC DESCRIPTIONS OF COMMON GENERA CENTRIC PENNATE DIATOMS ARAPHID GROUP MONORAPHID GROUP PRORAPHID GROUP BIRAPHID GROUP NAVICULOID SIGMOID GROUP HETEROPOLAR GROUP CYMBELLOID GROUP DIATOMS WITH RAPHE RAISED ON KEEL BIBLIOGRAPHY INDEX OF DIATOM SPECIES ILLUSTRATED IN THIS GUIDE
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  • 99
    Series available for loan
    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-300
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Sampling. - Byrd Station. - Plateau Station. - Camp Century. - lnge Lehmann. - Grain-crystal relations. - Analytical techniques. - Thin sections. - Crystal size measurements. - Results and discussion. - Literature cited. - Appendix A: Crystal size as a function of depth and age in the Antarctic and Greenland ice sheets. - Abstract.
    Description / Table of Contents: The growth of ice crystals as a function of depth and time in polar firn and glacier ice has been investigated at a number of locations in Antarctica and Greenland. Thin sections of snow and ice were used to measure crystal size variations which showed, in all cases, that crystal size increases essentially linearly with the age of samples. Crystal growth rates are strongly temperature dependent. At Camp Century, Greenland, where the firn temperature is -24°C, crystals grow approximately 23 times faster than at Plateau Station, Antarctica, where the in situ temperature is -57°C. Extrapolation of the existing data indicates that crystal growth rates in polar firn and ice could be expected to vary by about two orders of magnitude over the temperature range -60°C to -15°C. Examination of the changes in the pore-crystal structure relationships to a dpeth of 100 m at Camp Century shows that these changes closely resemble those occuring in the full-scale isothermal sintering of powder compacts.
    Type of Medium: Series available for loan
    Pages: iii, 19 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 300
    Language: English
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  • 100
    Call number: ZSP-202-301
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - 1.The flow of organic nutrients in plants in cold-dominated ecosystems and the influence of man's activities on this flow. - Methodology for extraction and estimation of plant lipids, alcohol and water-soluble carbohydrates, starch and fructans. - Seasonal cycles in lipids and alcohol-soluble carbohydrates in plants at Barrow, Alaska. - Biochemical changes in plants at the heated soil experiment at Barrow. - Literature cited. - II. Contributions of carbon dioxide from frozen soil into the arctic atmosphere. - Introduction. - Laboratory study. - Field study. - Conclusions. - Literature cited. - III. Biochemical estimations of underground plant biomass. - Appendix A. Methodology. - Abstract.
    Description / Table of Contents: Two approaches were used to study the carbon cycling in a cold-dominated ecosystem at Barrow, Alaska. One involved a detailed analysis of the flow of CO2 between the atmosphere, soil and biota and the other concentrated on the internal carbon cycling in plants. A pilot study was also conducted which investigated the possibility of estimating underground plant biomass by biochemical means. Both laboratory and field studies were conducted to analyze the input of CO2 to the arctic atmosphere by frozen tundra soils. Data are presented which indicate that frozen soil is a major source of CO2. It is hypothesized that CO2 trapped in soils during bi-directional freezing in the fall and winter is released during the spring thaw, thus producing a spring rise in CO2 content of the atmosphere. A procedure for the extraction and estimation of organic nutrients (lipids and carbohydrates) was developed and used to follow the seasonal cycle of these nutrients of plants obtained at Barrow, Alaska. No cycling in levels of carbohydrates (alcohol-soluble) was observed in the foliage during the season, however a definite cycling in lipid levels was seen for all the species studied. The species were synchronous. Plant survival and organic nutrient levels were followed during the winter over a heated-soil experiment at Barrow, Alaska. During the winter, the heating of the soil caused ponding which resulted in the elimination of Dupontia fischeri by mid-winter and the eventual death of all plants by spring. The carbohydrate levels indicated a starvation condition was created where a marked decrease in storage polymers (starch and fructans) occurred without a concurrent large increase in the alcohol-soluble carbohydrate levels. An increase in the fresh/dry weight ratios was also observed indicating etiolated, succulent growth in early winter. Four techniques were tried for estimating the below-ground biomass of plants. Two of these were eliminated as unsuitable, however two other methods(ATP and phospholipid-levels) remain to be fully evaluated.
    Type of Medium: Series available for loan
    Pages: iii, 26 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 301
    Language: English
    Branch Library: AWI Library
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