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  • 1
    Call number: AWI A5-96-0611
    In: Environmental fluid mechanics
    Type of Medium: Monograph available for loan
    Pages: 299 Seiten , Illustrationen
    Edition: 1st edition 1982, reprinted 1984
    ISBN: 9027712476
    Series Statement: Environmental fluid mechanics 1
    Language: English
    Note: Table of Contents: FOREWORD. - CHAPTER 1. INTRODUCTION. - 1.1. Definitions. - 1.2. Practical Scope. - a. The Water Budget. - b. The Energy Budget. - 1.3. Global Climatology. - 1.4. The Transfer of Other Admixtures at the Earth-Atmosphere Interface. - CHAPTER 2. HISTORY OF THE THEORIES OF EVAPORATION - A CHRONOLOGICAL SKETCH. - 2.1. Greek Antiquity. - 2.2. The Roman Period and the Middle Ages. - 2.3. The Seventeenth and Eighteenth Centuries: Initial Measurements and Experimentation. - 2.4. Foundations of Present Theories in the Nineteenth Century. - CHAPTER 3. THE LOWER ATMOSPHERE. - 3.1. Moist Air. - a. Some Parameter Definitions. - b. Useful Forms of the First Law of Thermodynamics. - c. Saturation Vapor Pressure. - 3.2. Hydrostatic Stability of Partly Saturated Atmosphere. - a. Small Adiabatic Displacements. - b. Potential Temperature. - 3.3. Atmospheric Transport of Water Vapor. - a. Conservation of Water Vapor. - b. Other Conservation Equations. - c. Solution of the Transport Equations . - 3.4. The Atmospheric Boundary Layer. - CHAPTER 4. MEAN PROFILES AND SIMILARITY IN A STATIONARY AND HORIZONTALLY UNIFORM ABL. - 4.1. The Dynamic Sublayer. - a. The Logarithmic Profile. - b. The Power Law Approximation. - 4.2. The Surface Sublayer. - a. The Mean Profiles. - b. Some Flux-Profile Functions. - 4.3. Bulk Parameterization of the Whole ABL. - a. Similarity for the Mean Profiles in the Outer Sublayer. - b. Bulk Transfer Equations for the ABL. - 4.4. The Interfacial Sublayers. - a. Similarity for the Mean Profiles. - b. Interfacial Bulk Transfer Equations for Scalar Admixtures. - c. Smooth Surfaces: The Viscous Sublayer. - d. Surfaces with Bluff Roughness Elements. - e. Surfaces with Permeable Roughnesses: The Canopy Sublayer. - CHAPTER 5. THE SURFACE ROUGHNESS PARAMETERIZATION. - 5.1. The Momentum Roughness. - a. Land Surfaces. - b. Water Surfaces. - 5.2. The Scalar Roughness. - a. Calculation from Interfacial Transfer Coefficients. - b. Values Over Water. - CHAPTER 6. ENERGY FLUXES AT THE EARTH'S SURFACE. - 6.1. Net Radiation. - a. Global Short Wave Radiation. - b. Albedo. - c. Long-Wave or Terrestrial Radiation. - 6.2. Energy Absorption by Photosynthesis. - 6.3. Energy Flux at Lower Boundary of the Layer. - a. Land Surfaces. - b. Whole Water Bodies. - c. Water Surfaces. - 6.4. Remaining Terms. - a. Energy Advection. - b. Rate of Change of Energy Stored in the Layer. - CHAPTER 7. ADVECTION EFFECTS NEAR CHANGES IN SURFACE CONDITIONS. - 7.1. The Internal Boundary Layer. - a. Equations for the Mean Field. - b. Methods of Closure for Disturbed Boundary Layers: A Brief Survey. - c. Some General Features of Local Momentum Advection. Fetch Requirement. - 7.2. Evaporation with Local Advection. - a. Analytical Solutions with Power Laws. - b. Numerical Studies. - CHAPTER 8. METHODS BASED ON TURBULENCE MEASUREMENTS. - 8.1. Direct or Eddy-Correlation Method. - a. Instruments. - b. Requirements on Instrumentation. - 8.2. The Dissipation Method. - a. The Direct Variance Dissipation Method. - b. The Inertial Dissipation (or Spectral Density) Method. - CHAPTER 9. METHODS BASED ON MEASUREMENTS OF MEAN PROFILES. - 9.1. Mean Profile Method With Similarity Formulations. - a. Measurements in the Surface Sublayer. - b. Measurements in the Dynamic Sublayer. - c. Upper-Air Measurements: The ABL Profile Method. - 9.2. Bulk Transfer Approach. - a. Over a Uniform Surface. - b. Evaporation From Lakes. - 9.3. Sampling Times. - CHAPTER 10. ENERGY BUDGET AND RELATED METHODS. - 10.1. Standard Application. - a. With Bowen Ratio (EBBR). - b. With Profiles of Mean Wind and of One Scalar (EBWSP). - 10.2. Simplified Methods for Wet Surfaces. - a. Some Comments on Potential Evaporation. - b. The EBWSP Method With Measurements at One Level. - c. Advection-Free Evaporation from Wet Surfaces. - 10.3. Simplified Methods for Actual Evapotranspiration. - a. Adjustment of Penman's Approach With Bulk Stomatal Resistance. - b. Complementary Relationships between Actual and Potential Evaporation. - c. Extensions of Equilibrium Evaporation Concept. - CHAPTER 11. MASS BUDGET METHODS. - 11.1 Terrestrial Water Budget a. Soil Water Depletion and Seepage. - b. River Basins and Other Hydrological Catchments. - c. Lakes and Open-water Reservoirs. - d. Water Budget-Related Instruments; Evaporimeters. - 11.2. Atmospheric Water Budget a. Concept and Formulation b. Application of the Method . - HISTORICAL REFERENCES (PRIOR TO 1900). - REFERENCES. - INDEX.
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  • 2
    Monograph available for loan
    Monograph available for loan
    New Delhi [u.a.] : Amerind Publ.
    Call number: AWI G10-98-0232
    Type of Medium: Monograph available for loan
    Pages: VII, 242 S.
    Series Statement: Arctic and Antarctic Scientific Research Institute 304 TT 75-52080
    Uniform Title: Problemy fiziko-geografičeskogo rajonirovanija poljarnych stran
    Language: English
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  • 3
    Call number: AWI A7-92-0314
    Type of Medium: Monograph available for loan
    Pages: IX, 560 S. , graph. Darst., Kt.
    Edition: 1st publ.
    ISBN: 0521252229
    Language: English
    Note: CONTENTS: Foreword. - Introduction. - SESSION I - ATMOSPHERIC GENERAL CIRCULATION MODELS AND CLIMATE SIMULATIONS. - Large-scale climate modelling and small-scale physical processes / J. Smagorinsky. - Simulation of climate by general circulation models with hydrologic cycles / S. Manabe. - Current parameterizations of land-surface processes in atmospheric general circulation models / D. J. Carson. - The sensitivity of numerically simulated climates to land surface conditions / Y. Mintz. - SESSION II - THE MICROPHYSICAL PROCESSES OF MOMENTUM, HEAT AND WATER TRANSFERS ACROSS AND NEAR THE SURFACE OF THE LAND. - Vertical flux of moisture and heat at a bare soil surface / W. H. Brutsaert. - The vertical fluxes of heat and moisture at a vegetated land surface / L. J. Fritschen. - Vertical flux of heat and moisture in snow and ice / M. Kuhn. - SESSION III - MESOSCALE PARAMETERIZATIONS OF THE TRANSFER PROCESSES. - Parameterization of hydrologic processes / J. C. I. Dooge. - Dynamic hydro-thermal balances at macroscale / P. S. Eagleson. - SESSION IV - LAND SURFACE GLOBAL DATA SETS. - Use of regional and global soils data for climate modelling/ M. J. Gardiner. - Land surface processes: Vegetation / A. Perrier. - Data on snow cover and glaciers for the global climatic models / V. M. Kotliakov and A. N. Krenke. - The shortwave albedo and the surface emissivity / K. Ya. Kondratyev, V. I. Korzov, V. V. Mukhenberg and L. N. Dyachenko. - Water balance / A. Baumgartner. - SESSION V - ACQUISITION OF LAND SURFACE DATA. - Possibilities for remote sensing of surface characteristics / K. I. Itten.
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  • 4
    Series available for loan
    Series available for loan
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-5
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: 39 S. : graph. Darst.
    Series Statement: Berichte zur Polarforschung 5
    Language: English
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  • 5
    Call number: AWI G3-99-0351
    Type of Medium: Monograph available for loan
    Pages: XIV, 489 Seiten , Illustrationen
    ISBN: 0-12-355860-3
    Series Statement: Burg Wartenstein symposium 81
    Language: English
    Note: Contents: Contributors. - Preface. - Acknowledgements. - Paleogeography. - Ancient vegetation - the fossil record. - The Steppe-Tundra concept and its application in Beringia. - Paleoclimate. - Primary production and the Pleistocene ungulates - the productivity paradox. - Man in ancient Beringia. - Paleoecology of Beringia - a synthesis. - References. - General index. - Index to faunal and floral taxa.
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  • 6
    Series available for loan
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-8
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: 20 S. : graph. Darst.
    Series Statement: Berichte zur Polarforschung 8
    Language: English
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  • 7
    Call number: MOP Per 581 ; MOP Per 581(1/8) ; ZSP-319/A-1(Sonderheft) ; ZSP-319/A-1(Sonderheft, 2. Ex.)
    In: Geodätische und geophysikalische Veröffentlichungen : Reihe 1, Heft 8, Sonderheft 1
    Type of Medium: Series available for loan
    Pages: 107 Seiten , Illustrationen
    Edition: Sonderheft des NKSCAR der DDR
    Series Statement: Geodätische und geophysikalische Veröffentlichungen : Reihe 1 8
    Language: German , English
    Note: Inhalt: I. Zoologische Untersuchungen im Gebiet der sowjetischen Antarktisstation "Bellinghausen" / R. BANNASCH und K. ODENING. - II. Deuterium- und 18O-Variationen in Seen der Schirmacher-Oase (Ostantarktika) / W. RICHTER und G. STRAUCH. - III. Stable isotope investigations in Antarctica / H. SCHÜTZE, G. STRAUCH, K. WETZEL. - IV. The influence of degradation processes on the isotopic composition of Antarctic precipitation / R. DER. - V. Sommerliche Eisvariationen in der Olaf-Prydz-Bucht / H. GERNANDT. - VI. Zur Geologie des nördlichen Teils des Neptune Range / Pensacola-Gebirges (Antarktika) / W. WEBER und L. V. FEDOROV. - VII. Beobachtungen am Krill (Euphausia superba DANA) im atlantischen Sektor der Antarktis in der Sommersaison 1978 und 1979 / S. HOLZLÖHNER. - VIII. Forschungsreise eines Zubringertrawlers in die Antarktis / G. GUBSCH und U. HOFFMANN.
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  • 8
    Call number: AWI Bio-99-0271
    In: Atlas of seeds and small fruits of Northwest-European plant species 〈Sweden, Norway, Denmark, East Fennoscandia and Iceland〉
    Type of Medium: Monograph available for loan
    Pages: 68 S.
    Language: English
    Note: Contents: Foreword. - Introduction. - Information concerning the Taxonomic Arrangement and the Origin of the Material Examined. - Notes on Keys and Descriptions. - Glossary. - List of Abbreviations. - Key to the Genera. - Cyperus. - Eriophorum. - Scirpus. - Blysmus. - Eleocharis. - Trichophorum. - Schoenus. - Cladium. - Rhynchospora. - Kobresia. - Carex. - References. - Index of Used Specimens. - Index of Species. - Explanation of Plates. - Plates 1—39. - Fold up Map of Simple Systematical Plane Shapes and Colour Chart.
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  • 9
    Call number: AWI E3-92-0497
    Type of Medium: Monograph available for loan
    Pages: XV, VII, 333 S. , Ill., graph. Darst., Kt.
    Edition: Repr. [of the ed.] London, 1901
    ISBN: 0905838416
    Language: English
    Note: Contents: Preface. - New introduction. - I. Introductory. - II. From Hobart to South Victoria Land. - III. Life in South Victoria Land. - IV. Cut off from all the world. - V. The winter in Victoria Land. - VI. Sledge Journey in winter. - VII. Among the penguins. - VIII. Return of the Southern Cross. - IX. Farthest south. - X. Towards civilization. - Appendix I. Appendix II.
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  • 10
    Call number: AWI A6-92-0306 ; MOP 46247 / Mitte
    Type of Medium: Monograph available for loan
    Pages: XVII, 477 Seiten , Illustrationen
    Edition: second editon
    ISBN: 0471059714
    Language: English
    Note: Contents: Abbreviations. - Partial List of Symbols. - 1 THE GOVERNING EQUATIONS. - 1-1 Introduction. - 1-2 Equation of Motion. - 1-3 Continuity Equation. - 1-4. - Equation of State. - 1-5 First Law of Thermodynamics. - 1-6 The Complete System of Equations. - 1-7 Coordinate Systems. - 1-8 Map Projections. - 1-8-1 Polar Stereographic Projection. - 1-8-2 Mercator Projection. - 1-8-3 Lambert Conformal Projection. - 1-8-4 Additional Remarks. - 1-9 Alternate Vertical Coordinates. - 1-9-1 Pressure Vertical Coordinate. - 1-9-2 Isentropic Vertical Coordinate Θ. - 1-10 Some Energy Relations. - 1-10-1 Kinetic Energy. - 1-10-2 Potential Energy. - 1-11 Available Potential Energy. - 1-12 Vorticity and Divergence Equations. - 1-12-1 Divergence Equations. - 2 WAVE MOTION IN THE ATMOSPHERE: PART 1. - 2-1 Introduction. - 2-2 Linearized Equations. - 2-3 Pure Sound Waves. - 2-4 Sound Waves and Internal Gravity Waves. - 2-5 Surface Gravity Waves. - 2-6 Inertial Gravity Waves and Rossby Waves. - 2-7 Response to Initial Conditions. - 2-8 Geostrophic Adiustment. - 3 SCALE ANALYSIS. - 3-1 Introduction. - 3-2 Shallow-Water Equations. - 3-3 Baroclinic Equations. - 3-4 Midlatitude Analysis. - 3-5 Tropics. - 3-6 Planetary Scale. - 3-7 Balance System. - 4 ATMOSPHERIC WAVES: PART. - 4-1 Introduction. - 4-2 Rossby Waves. - 4-3 Conditions for Barotropic Instability. - 4-4 Some Unstable Profiles. - 4-5 Linear Shear. - 4-6 Barotropic Effects in the Atmosphere. - 4-7 Baroclinic Instability. - 4-8 Baroclinic Instability with Linear Shear. - 4-9 Two-Level Model. - 4-10 Wave Structure. - 4-11 Vertical Energy Propagation. - 4-12 Barotropic Equatorial Waves. - 4-13 Vertical Structure of Equatorial Waves. - 5 NUMERICAL METHODS. - 5-1 Introduction. - 5-2 Finite Difference Methods. - 5-3 The Advection Equation. - 5-4 Some Basic Concepts. - 5-5 Stability Analysis. - 5-5-1 The Matrix Method. - 5-5-2 Von Neumann Method. - 5-5-3 The Energy Method. - 5-6 Examples of the Von Neumann Method. - 5-6-1 Euler Scheme. - 5-6-2 Uncentered Differencing, Von Neumann Method. - 5-6-3 Trapezoidal Implicit Scheme. - 5-6-4 Euler Backward Scheme. - 5-6-5 Fourth-Order Space Differencing. - 5-6-6 Oscillation Equation. - 5-6-7 Two-Dimensional Advection Equation. - 5-6-8 External Gravity Waves, Leapfrog Scheme. - 5-6-9 Staggered Grid. - 5-7 Forward-Backward Scheme, Pressure Averaging, and Semi-Implicit Methods. - 5-7-1 Forward-Backward Scheme. - 5-7-2 Pressure Averaging. - 5-7-3 Time Averaging. - 5-7-4 Semi-Implicit Method. - 5-7-5 Lax Wendroff Scheme. - 5-8 A Summary of Some Difference Schemes. - 5-9 Parabolic Equations. - 5-10 Elliptic Equations. - 5-10-1 Relaxation Method. - 5-10-2 Direct Methods. - 5-10-3 Gaussian Elimination. - 5-10-4 Buneman Variant. - 5-10-5 Helmholtz Equation on a Sphere. - 5-10-6 Reduction of a Three-Dimensional Elliptic Equation to Two-Dimensional Equations. - 5-11 Nonlinear Instability and Aliasing. - 5-11-1 Discrete Mesh. - 5-11-2 Primitive Equations Considerations. - 6 GALERKIN METHODS. - 6-1 Introduction. - 6-2 Example with Spectral and Finite Element Methods. - 6-3 Time Dependence. - 6-4 Barotropic Vorticity Equation with Fourier Basis Functions. - 6-5 Transform Method. - 6-6 Spectral Model of Shallow-Water Equations. - 6-7 Advection Equation with Finite Elements. - 6-8 Barotropic Vorticity Equation with Finite Elements. - 7 NUMERICAL PREDICTION MODELS. - 7-1 Filtered Models. - 7-1-1 Quasi-Geostrophic Equivalent Barotropic Model. - 7-1-1-1 Energetics of the Barotropic Model. - 7-1-2 Quasi-Geostrophic Multilevel Baroclinic Model. - 7-1-3 Linear Balanced Model. - 7-1-4 Nonlinear Balanced Model. - 7-2 Primitive Equation Models. - 7-2-1 Constraints from Continuous Equations. - 7-2-2 Vertical Differencing. - 7-3 Staggered Grid Systems. - 7-4 Example of a Staggered Primitive Equation Model. - 7-4-1 Equations in Curvilinear Coordinates. - 7-4-2 Horizontal Differencing. - 7-4-3 Energy Conservation. - 7-5 Potential Enstrophy Conserving Scheme. - 7-5-1 Continuous Integral Constraints. - 7-5-2 Difference Equations. - 7-5-3 Constraints Enforced. - 7-6 Spherical Grids. - 7-7 Fine Mesh Modeling. - 7-7-1 One-Way Influence. - 7-7-2 Boundary Conditions. - 7-7-3 Two-Way Interaction. - 7-7-4 Initialization on a Bounded Region. - 7-8 Baroclinic Spectral Models. - 7-9 Isentropic Coordinate Models. - 7-10 Upper Boundary Conditions. - 7-11 Mountain Effects. - 8 BOUNDARY LAYER REPRESENTATIONS. - 8-1 Introduction. - 8-2 Reynolds Equations. - 8-3 Bulk Formulas. - 8-4 Eddy Viscosity, K-Theory. - 8-5 Combined Prandtl and Ekman Layers. - 8-5-1 Prandtl Layer (Neutral Stratification). - 8-5-2 Ekman Layer. - 8-6 Nonneutral Surface Layer. - 8-6-1 Matching Ekman Spiral. - 8-7 Similarity Solutions for the Entire PBL. - 8-7-1 Deardorff Mixed Layer Model. - 8-7-2 Surface Layer. - 8-7-3 Matching Solutions for the Surface and Mixed Layers. - 8-7-4 Surface Wind Direction. - 8-7-5 Modified Transfer Coefficients. - 8-8 A Prediction Equation for h. - 8-8-1 Further Comments on PBL Parameterization. - 8-9 High-Resolution Model. - 8-9-1 The Coefficient of Eddy Viscosity. - 8-9-2 Surface Temperature. - 8-9-3 Some Prediction Model Details. - 8-10 Mean Turbulent Field Closure Models (Second-Order Closure). - 9 INCLUSION OF MOISTURE. - 9-1 Moisture Conservation Equation. - 9-1-1 Modified Thermodynamic Equation. - 9-1-2 Equivalent Potential Temperature and Static Energy. - 9-2 Convective Adjustment. - 9-2-1 Case A. Dry Convection, q 〈 qs. - 9-2-2 Case B. Moist Adjustment q ≥ qs. - 9-3 Modeling Cloud Processes. - 9-3-1 Nonconvective Condensation. - 9-4 Cumulus Parameterization. - 9-4-1 Introduction. - 9-4-2 Kuo Method. - 9-5 Parameterizations Involving Cloud Models. - 9-6 Arakawa and Schubert Model. - 9-6-1 Large-Scale Budget Equations. - 9-6-2 Cloud Budget Equations. - 10 RADIATION PARAMETERIZATION. - 10-1 Terrestrial Radiation. - 10-2 Absorbing Substances. - 10-3 Simplified Transmission Functions. - 10-4 Discretization, Long-Wave Radiation. - 10-4-1 Clear Sky. - 10-4-2 Cloudy Sky. - 10-5 Solar Radiation. - 10-5-1 Clear Sky. - 10-5-2 Cloudy Sky, One Cloud Layer. - 10-5-3 Two Contiguous Cloud Layers. - 10-5-4 Two Separated Cloud Layers. - 10-6 Miscellany. - 11 OBJECTIVE ANALYSIS AND INITIALIZATION. - 11-1 Introduction. - 11-2 A Three-Dimensional Analysis. - 11-3 Statistical Methods, Multivariate Analysis. - 11-4 Initialization. - 11-4-1 Introduction. - 11-4-2 Damping Techniques. - 11-4-3 Static Initialization. - 11-4-4 Variational Method. - 11-4-5 Normal Mode Expansions. - 11-4-6 Variational Normal Mode Initialization. - 11-5 Dynamic Balancing. - 11-6 Four-Dimensional Data Assimilation. - 11-7 Newtonian Relaxation or "Nudging". - 11-8 Smoothing and Filtering. - 11-8-1 Two-Dimensional Smoothers. - 11-8-2 Bandpass Filters. - 11-8-3 Boundary Effects. - 12 OCEAN DYNAMICS AND MODELING. - 12-1 Introduction. - 12-2 Wind-Driven Barotropic Models. - 12-3 Nonlinear Effects. - 12-4 Barotropic Numerical Models. - 12-5 Simple Thermohaline Models. - 12-6 Baroclinic Numerical Models. - 12-7 Bottom Topography Effects. - 12-8 Synoptic Scale Eddies. - 12-9 Mixed Layer Models. - 12-10 Problems in Ocean Modeling. - 13 WEATHER AND CLIMATE PREDICTION. - 13-1 Introduction. - 13-2 Current Forecasting Skill. - 13-2-1 Short Range. - 13-2-2 Medium and Longer Ranges. - 13-2-3 Additional Comments on Forecasting. - 13-3 Predictability of the Atmosphere. - 13-4 Statistical-Dynamical Prediction. - 13-4-1 Simple Empirical Corrections. - 13-4-2 Stochastic-Dynamical Prediction. - 13-5 Climate and Climate Prediction. - Appendix Mathematical Relations. - References. - Index.
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  • 11
    Series available for loan
    Series available for loan
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-16
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: 53 S. : graph. Darst., Kt.
    Series Statement: Berichte zur Polarforschung 16
    Language: English
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  • 12
    Call number: AWI Bio-98-0228
    In: Komarov lectures
    Description / Table of Contents: Contents: Translator's foreword. - Preface. - Acknowledgements. - 1 Division of the Arctic into geobotanical areas. - 2 The geobotanical regions of the Arctic: the tundra region. - 3 The geobotanical regions of the Arctic: the region of the arctic polar deserts. - 4 Division of the Antarctic into geobotanical areas. - 5 Conclusions. - References. - List of Latin plant names. - Index
    Type of Medium: Monograph available for loan
    Pages: 247 S. : graph. Darst.
    ISBN: 0521231191
    Series Statement: Komarov lectures 29
    Uniform Title: Geobotaničeskoe rajonirovanie Arktiki i Antarktiki
    Language: English
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  • 13
    Call number: AWI G9-89-0476
    In: International Union of Geological Sciences : Series B, Number 4
    Description / Table of Contents: Antarctic Geoscience is the proceedings volume of the Third Symposium on Antarctic Geology and Geophysics, held in Madison, Wisconsin. The 151 chapters in the book, which include both review papers and original contributions, range over all major fields of geoscience. At a time when interest in Antarctica, its geologic history, and its mineral resource potential is increasing, this book provides the most current and comprehensive overview of the subject. These papers, representing the recent work of many scientists from fifteen nations, offer a balanced assessment of current thought and knowledge concerning the geology and geoscience of Antarctica and the surrounding oceanic regions. Together, they constitute the most up-to-date reference work on Antarctic earth sciences. The book is divided into twelce sections: Gondwanaland (11 chapters), Scotia Arc Region (39, East Antarctica Shield (14), Upper Precambrian-Paleozoic Rocks (11), Paleontology (8), Igneous Rocks (14), Structural Geology and Tectonics (9), Mineral Deposits (4), Crustal Structure (13), Subglacial Morphology (4), Marine Geology (8), and Cenozoic History (16). The volume is generously illustrated with photographs and line drawings and includes a large color geologic map of the continent.
    Type of Medium: Monograph available for loan
    Pages: 1172 Seiten , Illustrationen , 29 cm
    Edition: First printing
    ISBN: 0299084108 , 0-299-08410-8
    Series Statement: International Union of Geological Sciences : Series B Number 4
    Language: English
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  • 14
    Call number: AWI P8-89-0293
    In: Heidelberger geographische Arbeiten, Heft 69
    Type of Medium: Monograph available for loan
    Pages: 573 Seiten , Illustrationen , 2 Kartenbeilagen , 24 cm
    ISBN: 3885700697
    Series Statement: Heidelberger geographische Arbeiten 69
    Language: German , English
    Note: Inhaltsverzeichnis: Vorwort. - 1. Zielsetzung und Ablauf der Heidelberg-Ellesmere Island-Expedition 1978 / D. Barsch und L. King. - 2. Das Borup-Fjord-Gebiet in N-Ellesmere Island, N. W. T., Kanada: Entdeckung und Begehung des Gebietes, vorhandene Karten und offizielle Namen / L. King. - 3. Geodätische und photogrammetrische Arbeiten an der Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada, im Rahmen der "Heidelberg-Ellesmere-Island-Expedition 1978" / G. Hell. - 4. Geologie, Tektonik und strukturelle Verzeichnung der geomorphologischen Großformen im Expeditionsgebiet Oobloyah Bay - Neil Peninsula, N-Ellesmere Island, N.W.T., Kanada / H. R. Völk. - 5. Witterungsverlauf im Oobloyah-Tal, N-Ellesmere Island, N.W.T., Kanada, vom 24. Juni bis zum 4. August 1978, ein statistischer Wertevergleich / W. A. Flügel. - 6. Das Sommerklima von N-Ellesmere Island, N.W.T., Kanada - eine Beurteilung von Stationswerten unter besonderer Berücksichtigung des Sommers 1978 / L. King. - 7. Zur Geomorphologie des Expeditionsgebietes Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada / D. Barsch. - 8. Studien zur gegenwärtigen Geomorphodynamik im Bereich der Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada / D. Barsch. - 9. Terassen, Flußarbeit und das Modell der exzessiven Talbildungszone im Expeditionsgebiet Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada / D. Barsch. - 10. Die Gletscher im Einzugsgebiet des Borup-Fjord, N-Ellesmere Island, N.W.T., Kanada / L. King. - 11. Gletschergeschichtliche Arbeiten im Gebiet zwischen Oobloyah Bay und Esayoo Bay, N-Ellesmere Island, N.W.T., Kanada / L. King. - 12. Glaziologische Beobachtungen an der Stirn des Weber-Gletschers, Borup-Fjord-Gebiet, N-Ellesmere Island, N.W.T., Kanada / D. Barsch, L. King und R. Mäusbacher. - 13. Jungquartäre Delta- und Flußentwicklung im glazialisostatischen Hebungsraum der Oobloyah Bay auf N-Ellesmere Island, N.W.T., Kanada / H. R. Völk. - 14. Hydrologische Studien zum Wasserhaushalt hocharktischer Einzugsgebiete im Bereich des Oobloyah-Tals, N-Ellesmere Island, N.W.T., Kanada / W. A. Flügel. - 15. Hydrochemische Untersuchungen von Niederschlägen, Bodenwasser, Seen und Flüssen im Oobloyah-Tal, N-Ellesmere Island, N.W.T., Kanada / W. A. Flügel. - 16. Geomorphologische Kartierung im Oobloyah-Tal, N-Ellesmere Island, N.W.T., Kanada / R. Mäusbacher. - 17. Gesteinstemperaturen und Insolationsverwitterung im hocharktischen Bereich, Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada / H. Eichler. - 18. Kleinformen der hocharktischen Verwitterung im Bereich der Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada - Formengenese und Prozesse / H. Eichler. - 19. Oberflächennahe Bodentemperaturmessungen in Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada / R. Mäusbacher. - 20. Recent iron ore deposition and heavy metal accumulation in Access Lake, Oobloyah Valley, northern Ellesmere Island, N.W.T., Canada / D. Barsch und G. Müller. - 21. Die Meereisentwicklung im Inneren des östlichen kanadischen Arktisarchipels und ihre Bedeutung für die Arbeiten der Heidelberg-Ellesmere Island-Expedition an der Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada / L. King. - 22. Gefäßpflanzen von Oobloyah Bay, N-Ellesmere Island, N.W.T., Kanada; eine kommentierte Pflanzenliste und phänologische Beobachtungen / R. Mäusbacher. - 23. The mosses of peat mounds, Oobloyah Bay, northern Ellesmere Island, N.W.T., Canada / L. King. - 24. Beobachtungen zu organischen Kleinformen im Oobloyah Tal, N-Ellesmere Island, N.W.T., Kanada / W. A. Flügel und R. Mäusbacher. - 25. Faunal notes of the Heidelberg Ellesmere Island Expedition 1978, Oobloyah Bay, northern Ellesmere Island, N.W.T., Canada / D. Barsch und L. King. - Anlage 1: Orthophotokarte 〈1 : 25 000〉 Oobloyah Bay. - Anlage 2: Geomorphologische Karte 〈1 : 25 000〉 Oobloyah Bay. - Anlage 3: Radiocarbondaten. - Anlage 4: Planung, Einkauf und Lagerung der Nahrungsmittel. , Beiträge teilweise in deutsch, teilweise in englisch
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  • 15
    Call number: ZSP-168-15
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: 59 S. : Kt.
    Series Statement: Berichte zur Polarforschung 15
    Language: English
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  • 16
    Monograph available for loan
    Monograph available for loan
    Berlin : Nationalkomitee für Geodäsie und Geophysik der DDR bei der Deutschen Akademie der Wissenschaften
    Associated volumes
    Call number: MOP 34587 ; MOP Per 581(1/3) ; ZSP-319/A-3
    In: Geodätische und geophysikalische Veröffentlichungen : Reihe 1, Nr. 3
    Type of Medium: Monograph available for loan
    Pages: 48 Seiten
    Series Statement: Geodätische und geophysikalische Veröffentlichungen : Reihe 1 3
    Language: English
    Location: MOP - must be ordered
    Location: MOP - must be ordered
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  • 17
    Call number: AWI Bio-99-0205-2 ; AWI Bio-99-0205-1
    In: Atlas of seeds and small fruits of Northwest-European plant species 〈Sweden, Norway, Denmark, East Fennoscandia and Iceland〉
    Type of Medium: Monograph available for loan
    Pages: 259 S. , Ill.
    ISBN: 9172604980
    Language: English
    Note: Contents: Introduction. - Information concerning the Taxonomic Arrangement and the Material Examined. - Notes on Keys and Descriptions. - Glossary. - List of Abbreviations. - Salicaceae. - Myricaceae. - Corylaceae. - Betulaceae. - Fagaceae. - Ulmaceae. - Cannabaceae. - Urticaceae. - Santalaceae. - Loranthaceae. - Polygonaceae. - Chenopodioneae. - Amaranthaceae. - Portulacaceae. - Caryophyllaceace. - Nymphaeaceae. - Ceratophyllaceae. - Ranunculaceae. - Paeoniaceae. - Berberidaceae. - Aristolochiaceae. - Papaveraceae. - Cruciferae. - References. - Index of Taxa. - Plates. - Simple Symmetrical Plane Shapes.
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  • 18
    Call number: AWI G5-98-0371
    In: SEPM short course, No. 10
    Type of Medium: Monograph available for loan
    Pages: Getrennte Zählung , Illustrationen , 30 cm
    Series Statement: SEPM short course 10
    Language: English
    Note: CONTENTS: Introduction / Michael A. Arthur. - Chapter 1: Stable isotopes of oxygen and carbon and their application to sedimentologic and paleoenvironmental problems / Thomas F. Anderson and Michael A. Arthur. - Chapter 2: Stable isotopes of sulfur, nitrogen and deuterium in recent marine environments / Ian R. Kaplan. - Chapter 3: Chemical diagenesis of carbonates: theory and application of trace element technique / Ján Veizer. - Chapter 4: The application of stable isotopes to studies of the origin of dolomite and to problems of diagenesis of clastic sediments / Lynton S. Land. - Bibliography.
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  • 19
    Call number: AWI G2-93-0199
    Description / Table of Contents: The essays in this volume cover: the materials which may be recognizably preserved for varying periods of time or whose presence in certain deposits may be inferred from characteristic products of their diagenesis; how and to what extent these materials or diagenetic products may be used to reconstruct the flora of a lake basin, its catchment area or regions further away; the reliability or fallibility of chemical, physical or biological methods of analysis, where materials come from, to what extent they are homogeneously or heterogeneously deposited after arrival in a lake basin and whether the latter situation arises ab initio or is the result of later perturbations; the various direct or indirect methods of dating deposits, even on a global scale, and stress, strain and stability in lacustrine environments. Some chapters are devoted to reconstruction of the past during certain periods of time in given localities but in all the chapters the matters considered and views expressed are related to previous work done in various parts of the world. The book will be of value to all concerned with the past and present environment, botany, ecology, hydrology, and geography. The reference sections provide a comprehensive bibliography of palaeolimnological and related literature.
    Type of Medium: Monograph available for loan
    Pages: XVIII, 411 S. : Ill., graph. Darst., Kt.
    ISBN: 0816613648
    Language: English
    Note: Table of Contents: Winifred Tutin - a personal note / John W. G. Lund. - 1 Chemical stratigraphy of lake sediments as a record of environmental change / D. R. Engstrom and H. E. Wright. - 2 Organic geochemistry of lacustrine sediments: triterpenoids of higher-plant origin reflecting post-glacial vegetational succession / P. A. Cranwell. - 3 Empirical testing of 210Pb-dating models for lake sediments / F. Oldfield. - 4 The transfer of natural and artificial radionuclides to Brotherswater from its catchment / J. D. Eakins ... - 5 A global review of palaeomagnetic results from wet lake sediments / R. Thompson. - 6 Stratigraphic changes in algal remains (diatoms and chrysophytes) in the recent sediments of Blelham Tarn, English Lake District / Elizabeth Y. Haworth. - 7 The preservation of algal remains in recent lake sediments / David Livingstone. - 8 Stress, strain, and stability of lacustrine ecosystems / Edward S. Deevey, Jr. - 9 Pollen recruitment to the sediments of an enclosed lake in Shropshire, England / Anne P. Bonny and Peter V. Allen. - 10 Sediment focusing and pollen influx / Margaret Bryan Davis ... - 11 Stages in soil development reconstructed by evidence from hypha fragments, pollen and humus contents in soil profiles / Svend T. Andersen. - 12 Pollen diagrams from Cross Fell and their implication for former tree-lines / Judith Turner. - 13 The Holocene vegetation of the Burren, western Ireland / W. A. Watts. - 14 Late-Quaternary pollen and plant macrofossil stratigraphy at Lochan an Druim, north-west Scotland / Hilary H. Birks. - Index.
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  • 20
    Series available for loan
    Series available for loan
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-11
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: 40 S. : Kt.
    Series Statement: Berichte zur Polarforschung 11
    Language: English
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  • 21
    Call number: AWI E3-93-0322
    Type of Medium: Monograph available for loan
    Pages: 271 Seiten , Illustrationen , 21 cm
    Language: Russian , English
    Note: Contents: From the editor. - The sixth Soviet Antarctic Expedition (1960-1962). - The Pravda Coast. - Unloading the Ob at Mirny. - Operations of expedition parties. - Aerometeorological researches. - Sea and coastal ice researches. - Geophysical researches. - Operations of the aviation group. - Connection with Antarctic expeditions of other countries. - Brief summary of results of researches conducted by the sixth Soviet Antarctic Expedition. - The Seventh Soviet Antarctic Expedition (1961-1963). - Organization and tasks of the expedition. - Routes of expedition ships. - D/s Ob. - M/s Kooperatsia. - First flight: the Soviet Union - Antarctica. - Flight Moscow - Mirny. - Flights in Antarctica. - Home-coming. - The Pravda Coast. - Unloading the ships. - Operations of the expedition parties. - Traverses to the 100th km. - Brief summary of results of researches conducted by the Seventh Soviet Antarctic Expedition. - The Eighth Soviet Antarctic expedition (1962-1964). - Organization and tasks of the expedition. - Routes of expedition ships. - D/s Ob. - M/s Esthonia. - Mirny Observatory. - Tractor-sledge traverses of inland areas of Eastern Antarctica. - Sixth expedition traverses. - Auxiliary traverse along the route Mirny - Komsomolskaya - Mirny. - Transport traverse along the Mirny - Vostok route. - Scientific-research traverse along the route Komosomolskaya - Sovetskaya - Vostok - Komsomolskaya. - Eighth expedition traverse. - Operation of the Antarctic stations. - Vostok. - Komsomolskaya. - Novolazarevskaya. - Enderby Land. - Debarkation and unloading the "Ob". - Operation of expedition parties. - Molodezhnaya. - Atlas of the Antarctic. - International cooperation in the study of Antarctica. - Antarctic treaty. - Second consultative meeting concerning the Antarctic treaty. - Scientific Committee on Antarctic researches. - Abstract. - References. - Appendices. - 1. List of members of the Soviet Antarctic Expeditions. - 2. Main data of the Soviet Antarctic stations. - 3. Calendar of the expedition ships operations. - 4. Personnel of the Soviet Antarctic Expeditions of 1955-1965. - 5. Period of operations of the Soviet Antarctic Expeditions of 1955-1964. - 6. Recommendations of the First Consultative Meeting concerning the Antarctic Treaty. - 7. Recommendations of the Second Consultative Meeting concerning the Antarctic Treaty. , In kyrillischer Schrift , Mit englischer Zusammenfassung
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  • 22
    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-202-260
    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
    Language: English
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  • 23
    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-202-264
    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.
    Type of Medium: Series available for loan
    Pages: iv, 7 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 264
    Language: English
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  • 24
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Materiel Command Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-251
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Theory. - Application to ice sheets and ice shelves. - Summary. - Literature cited.
    Description / Table of Contents: An analysis is made of the rate of bubble coalescence in a deforming ice mass. A total strain of at least 8 is required before appreciable coalescence occurs, The analysis has.been applied to deforming ice shelves and ice sheets. No appreciable coalescence is expected in ice shelves but coalescence should occur in ice sheets (or glaciers) if the shear strain rate at the bottom surface is of the order of 0.075/yr or larger. Measurements of bubble concentration are capable of setting limits on paleo-strain rates of the present ice sheets. Bubble migration down temperature gradients presents complications to the study of bubble coalescence.
    Type of Medium: Series available for loan
    Pages: iv, 5 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 251
    Language: English
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  • 25
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    Series available for loan
    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.
    Type of Medium: Series available for loan
    Pages: iv, 13 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 246
    Language: English
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  • 26
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    Series available for loan
    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-245
    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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  • 27
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    Series available for loan
    Hanover, NH : US Army Materiel Command, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-240
    In: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command, 240
    Description / Table of Contents: A 4-summer hydrologic record from a 1.6 km^2 drainage basin at Barrow, Alaska is analyzed. The watershed, a drained lake basin, is underlain by continuous permafrost within 0.3m of the tundra surface and is covered by ice-wedge polygons and numerous small shallow ponds. Considerable variations from the 20-yr means of summer climate (thaw period 88 days, precipitation 67 mm) are represented in the data: 1963 - cold, extremely wet; 1964 - cold, extremely dry; 1965 - cool, dry; 1966 - cool, wet. Runoff varied greatly from storm to storm, occurring primarily through and over the tundra mat and through an intricate system of polygonal troughs and ponds. As a result of the subdued coastal topography, varying areas (0.3 km^2 to 1.6 km^2) contribute to runoff from different storms. Analyses of hydrographs revealed: 1) lag times generally from 3 to 10 hr; 2) recession constants of about 50 hr, but occasionally as much as 160 hr; and 3) runoff from individual storms between 1 and 70%. About 5% of the thaw season precipitation normally runs off. Comparison of total thaw season precipitation between the U.S. Weather Bureau and a shielded gage located on the watershed indicated no major differences. If "trace" precipitation is considered, only 90% of the actual precipitation may be recorded. Pan evaporation for an average thaw season is about 160 mm and evapotranspiration which is essentially in balance with precipitation is about 60 mm. Conductivity of runoff water varied from 250 [My]mhos during sustained discharge to more than 500 [My]mhos during low flows in dry years. Precipitation chemistry showed no correlation with storm direction. Assuming all winter precipitation runs off, and the data are spatially and temporally representative, about 50% of the measured annual precipitation in this region runs off into the Arctic Ocean.
    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 240
    Language: English
    Note: CONTENTS: Preface. - Summary. - Introduction. - Regional setting. - Description of watershed. - Climatic record. - Methods. - Precipitation. - Water and air temperatures. - Discharge. - Evaporation and pond levels. - Water chemistry. - Soil thaw. - Results and discussion. - Precipitation. - Runoff. - Evaporation and transpiration. - Water chemistry. - Conclusions. - Literature cited.
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  • 28
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    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-277
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Nomenclature. - Introduction. - Basic equations. - Constitutive relations. - Elastic region. - Plastic region. - Stability of the differential equation. - Stability of the difference equation. - Literature cited.
    Description / Table of Contents: An analysis is made of the stability of difference approximation to one-dimensional shock wave propagation in elastic-plastic media. The necessary condition for stability is obtained.
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    Pages: iv, 9 Seiten
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 277
    Language: English
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  • 29
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    Series available for loan
    Hanover, NH : U.S. Army Corps of Engineers, Cold Regions Research and Engineering Laboratory
    Associated volumes
    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
    Language: English
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  • 30
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    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
    Associated volumes
    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.
    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 267
    Language: English
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  • 31
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Corps of Engineers, Cold Regions Research and Engineering Laboratory
    Associated volumes
    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.
    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 250
    Language: English
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  • 32
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    Series available for loan
    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-249
    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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  • 33
    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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  • 34
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    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-266
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Introduction. - Review of dielectric properties of soils and rocks. - Methods and measurements. - Introduction. - Dispersion. - Experimental procedures. - Introduction. - Apparatus. - Correction for stray fields. - Material. - Results. - The dielectric properties of Na-montmorillonite suspensions as a function of concentration. - The dielectric properties of K-montmorillonite water suspension. - Conclusions. - Outlook. - Literature cited.
    Description / Table of Contents: The dielectric properties of Na- and K- montmorillonite suspensions with concentrations varying from 2.5% to 0.10% by weight were measured at 25°C in the frequency range of 50 Hz to 20 kHz. Effects of electrode polarization were minimized by using the same stainless steel electrodes at different interelectrode distances and a correction was applied to compensate for stray fields. This investigation establishes the fact that the high dielectric constants of clay suspensions at audio frequencies are real and not the result of electrode polarization. The polarization that determines the dispersion is an interfacial phenomenon between the ionic atmosphere and the negatively charged clay particle. The results of this study show that clay suspensions have the same dispersion as soil samples, indicating the probability that the dispersion of wet soils in the frequency range from 50 Hz to 20 kHz is similar for most soils. The actual value of the dielectric constant, however, cannot yet be predicted.
    Type of Medium: Series available for loan
    Pages: iii, 17 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 266
    Language: English
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  • 35
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    Series available for loan
    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-263
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Abstract. - Introduction. - Theoretical background. - Experimental apparatus and procedures. - Results and discussion. - Conclusions. - Literature cited.
    Description / Table of Contents: The transition in the mode of heat transfer from conduction to convection in a layer of water formed continuously by melting ice from below has been determined experimentally. This was accomplished by locating the inflection point on the curve relating the water-ice interface (or melting front) and time. Thus, the critical Rayleigh number, Rac, at which convective heat transfer started can be correlated empirically as a function of warm plate temperature, Ts, by Rac= 14,200 exp(-6.64 x 10^-2 Ts). This relation is valid for Ts varying from 7.72 to 25.50°C. The initial ice temperature T0 was varied from -4.8 to -22.00°C. The effect of T0 was found to be insignificant. Homogeneous, bubble-free ice was prepared and used in all the experiments.
    Type of Medium: Series available for loan
    Pages: iv, 12 Seiten , Illustrations
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 263
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  • 36
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-254
    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.
    Type of Medium: Series available for loan
    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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  • 37
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    Series available for loan
    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.
    Type of Medium: Series available for loan
    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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  • 38
    Series available for loan
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    Hanover, NH : U.S. Army Materiel Command, Terrestrial Sciences Center, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-252
    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.
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    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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  • 39
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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.
    Type of Medium: Series available for loan
    Pages: v, 20 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 253
    Language: English
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  • 40
    facet.materialart.
    Unknown
    Leningrad : Vsesoj. im. Lenina Naučno-Issl. Geol. Institut im A. P. Karpinskogo
    Call number: AWI K-96-0595(1-16) ; AWI K-96-0522(1-16)
    Pages: 1 Kt. auf 16 Bl. : mehrfarb. ; Gesamtgr. 337 x 206 cm
    Language: Russian , English
    Note: In kyrill. Schr. - Legende russ. u. engl.
    Location: 16
    Location: 16
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  • 41
    Call number: ZSP-553-8
    In: Meddelelser om Grønland
    Type of Medium: Series available for loan
    Pages: 392 S. : Ill., graph. Darst., Kt.
    ISBN: 8717029697
    Series Statement: Meddelelser om Grønland : Geoscience 8
    Language: English
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  • 42
    Call number: AWI P2-88-0760-3
    In: Antarctica and international law, Volume 3
    Type of Medium: Monograph available for loan
    Pages: XI, 551 Seiten
    ISBN: 0379203325
    Language: English
    Note: Arrangement of Volume III: Part VIII Germany. - Part IX Federal Republic of Germany. - Part X Japan. - Part XI New Zealand. - Part XII Norway. - Part XIII Peru. - Part XIV Poland. - Part XV South Africa. - Part XVI Union of Soviet Socialist Republics. - Part XVII United Kingdom of Great Britain and Northern Ireland. - Part XVIII United States of America. - Part XIX Uruguay.
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  • 43
    Monograph available for loan
    Monograph available for loan
    New Brunswick [u.a.] : Rutgers Univ.
    Call number: AWI P8-08-0038
    Type of Medium: Monograph available for loan
    Pages: 126 S. : Ill.
    Edition: Final Report
    Language: English
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  • 44
    Monograph available for loan
    Monograph available for loan
    London : Wykeham Publications
    Associated volumes
    Call number: AWI A5-16-89783
    In: The Wykeham science Series ; 3, 3
    Type of Medium: Monograph available for loan
    Pages: xv, 240 S. , Ill., graph. Darst. , 22 cm
    Edition: Repr.
    ISBN: 0851090400
    Series Statement: The Wykeham science series 3
    Language: English
    Note: Contents: Preface. - Symbols, units and numerical values. - 1. The nature and scope of meteorology. - 1.1. Meteorology in relation to other sciences. - 1.2. Variations in space and time. - 1.3. Applied meteorology. - 2. Physical properties of the atmosphere. - 2.1. Composition of dry air. - 2.1.1. Mean molecular weight. - 2.1.2. Dissociation and ionization. - 2.1.3. Escape to space of component molecules. - 2.2. Pressure, density and temperature. - 2.2.1. Definition of pressure. - 2.2.2. Values near sea level. - 2.2.3. Variations in the vertical. - 2.2.4. Diurnal fluctuations at upper levels. - 2.2.5. Horizontal pressure gradients. - 2.3. Water vapour. - 2.3.1. Humidity mixing ratio. - 2.3.2. Density of moist air. - 2.3.3. Saturation vapour pressure. - 2.3.4. Paths leading to saturation. - 2.3.5. Measurement of vapour pressure. - 2.3.6. Distribution of water vapour. - 3. Heat transfer. - 3.1. Radiation processes. - 3.1.1. Solar radiation: its energy distribution. - 3.1.2. The solar constant. - 3.1.3. Effect of the atmosphere and earth on solar radiation. - 3.1.4. Radiation from the earth and atmosphere. - 3.2. Convection. - 3.2.1. Adiabatic temperature changes. - 3.2.2. Adiabatic equation. - 3.2.3. Potential temperature: dry adiabatic lapse rate. - 3.2.4 Saturated adiabatic lapse rate. - 3.2.5. Stability and instability. - 3.3. Heat transfer in land and sea. - 3.3.1. Heating and cooling of soil. - 3.3.2. Heating and cooling of water. - 4. Condensation and precipitation. - 4.1. Microphysical processes. - 4.1.1 Condensation nuclei. - 4.1.2. Curvature and solute effects. - 4.1.3. Water-droplet clouds. - 4.1.4. Ice nuclei. - 4.1.5. Ice-crystal clouds. - 4.1.6. Precipitation from water clouds. - 4.1.7. Precipitation from mixed clouds. - 4.1.8. Thunderstorm electricity. - 4.2. Larger-scale processes. - 4.2.1. Surface cooling. - 4.2.2. Evaporation. - 4.2.3. Vertical motion. - 4.3. Cloud observations. - 4.3.1. Cloud genera: their heights and composition. - 4.3.2. Cloud recognition and general features. - 4.3.3. Effects of vertical wind shear. - 4.3.4. Cloud classification for forecasting. - 5. The tephigram. - 5.1. Construction of the diagram. - 5.1.1. Coordinates: area and energy. - 5.1.2. Isobars. - 5.1.3. Saturation mixing ratio lines. - 5.1.4. Saturated adiabatics. - 5.1.5. Height variation. - 5.2. Simple graphical computations. - 5.2.1. Height. - 5.2.2. Humidity elements. - 5.2.3. Condensation levels. - 5.2.4. Föhn effects. - 5.3. Precipitable water and precipitation rate. - 5.3.1. Formula and calculation. - 5.3.2. Precipitation rate. - 5.3.3. Water content of convection clouds. - 5.4. The effects of vertical motion on lapse rate. - 5.4.1. Unsaturated or saturated motion. - 5.4.2. Potential (convective) instability. - 5.5. Tephigram analysis. - 5.5.1. Latent instability. - 5.5.2. Air mass characteristics. - 6. Winds. - 6.1. Laws of motion and the earth's rotation. - 6.1.1. Newton's First and Second Laws. - 6.1.2. Nature of the earth's rotation. - 6.1.3. Effects of the earth's rotation: the Coriolis force. - 6.2. Inertial flow and geostrophic winds. - 6.2.1. Nature of inertial flow. - 6.2.2. Nature of geostrophic flow. - 6.2.3. Geostrophic wind equation. - 6.2.4. Wind and pressure near the equator. - 6.3. Gradient winds. - 6.4. Winds in the friction layer. - 6.5. Thermal winds. - 6.5.1. Vertical shear vector. - 6.5.2. Temperature control of the shear vector. - 6.5.3. Thermal wind equation and thickness charts. - 6.5.4. Hodographs and temperature advection. - 6.5.5. Jet streams. - 7. Instruments and observations. - 7.1. Routine surface observations. - 7.1.1. Pressure. - 7.1.2. Temperature and humidity. - 7.1.3. Precipitation and evaporation. - 7.1.4. Wind. - 7.1.5. Clouds and visibility. - 7.1.6. Sunshine and radiation. - 7.1.7. Ship observations. - 7.2. Upper air observations. - 7.2.1. Historical. - 7.2.2. The radiosonde: radar winds. - 7.2.3. Ozone measurements. - 7.3. World Weather Watch. - 7.4. Experiments in observation and interpretation. - 7.4.1. Pressure. - 7.4.2. Temperature and humidity. - 7.4.3. Evaporation and rainfall. - 7.4.4. Wind. - 7.4.5. Radiation. - 7.4.6. Topographical influences. - 8. Synoptic Meteorology. - 8.1. The surface weather map: an introduction. - 8.1.1. The plotting code. - 8.1.2. Pressure systems and features. - 8.1.3. Air masses. - 8.1.4. Fronts. - 8.2. Air mass characteristics. - 8.2.1. Classification. - 8.2.2. Modifications. - 8.2.3. Air masses over the British Isles. - 8.3. Frontal characteristics. - 8.3.1. The stability of a frontal surface. - 8.3.2. Equilibrium slope of a frontal surface. - 8.3.3. Frontal structure. - 8.4. Frontal depressions. - 8.4.1. The life cycle of a frontal depression. - 8.4.2. Cold front waves; depression families. - 8.4.3. Warm front waves. - 8.4.4. Secondaries at points of occlusion. - 8.5. Non-frontal depressions. - 8.5.1. Heat lows. - 8.5.2. Polar lows. - 8.5.3. Orographic lows. - 8.5.4. Tropical cyclones. - 8.5.5. Tornadoes. - 8.6. Anticyclones. - 8.6.1. General characteristics. - 8.6.2. Cold and warm anticyclones. - 8.7 Synoptic development. - 8.7.1. Convergence, divergence and vertical motion. - 8.7.2. Convergence and vorticity. - 8.7.3 Long waves. - 8.7.4. Circulation indices: blocking. - 8.8. Surface analysis. - 8.8.1. General. - 8.8.2. Representativeness of observations. - 8.8.3. METMAPS. - 9. Micrometeorology. - 9.1. The nature of airflow near the ground. - 9.1.1. Wind speeds over a uniform level surface. - 9.1.2. Flow within a fluid boundary layer. - 9.1.3. Shearing stress via the mixing length concept. - 9.1.4. The friction velocity u*. - 9.1.5. Interpretation of the mixing length concept. - 9.1.6. The wind profile equation in complete form. - 9.2. The influence of surface roughness on the wind. - 9.2.1. Roughness in the aerodynamic sense. - 9.2.2. Roughness in relation to shearing stress and mean wind speed. - 9.2.3. The drag coefficient CD. - 9.2.4. CD as a transfer coefficient. - 9.2.5. Effect of a change in surface roughness. - 9.3. Vertical transport by turbulence. - 9.3.1. Flux equations; use of electrical analogy. - 9.3.2. Heat flux and other calculations. - 9.3.3. Vertical temperature gradients in relation to turbulent exchange. - 10. The general circulation. - 10.1. General characteristics. - 10.1.1. Genesis and interactions. - 10.1.2. Time fluctuations. - 10.2. Observations. - 10.2.1. Time- and space-averaging. - 10.2.2. Tracers. - 10.3. Experiment and theory. - 10.3.1. The rotating vessel experiment. - 10.3.2. Conservation principles. - 10.3.3. Cellular models. - 10.4. Climatic zones. - 11. Weather forecasting. - 11.1. Historical survey. - 11.1.1. 1860-1920. - 11.1.2. 1920-1945. - 11.1.3. 1945-1960. - 11.1.4. 1960 onwards. - 11.2. Conventional forecasting. - 11.2.1. Pressure tendency. - 11.2.2. Making the forecast. - 11.3. Long-range forecasting. - 11.3.1. Statistical methods. - 11.3.2. Synoptic methods. - 11.3.3. Analogues. - 11.4. Numerical forecasting. - 11.4.1. The barotropic model. - 11.4.2. Later developments. - 11.5. Predictability and control. - 11.5.1. Short-range predictability. - 11.5.2. Medium-range predictability. - 11.5.3. Long-range predictability: climatic trends. - 11.5.4. Weather and climate modification. - Answers to Problems. - Subject Index. - The Wykeham Series.
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  • 45
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-84/32
    In: CRREL Report, 84-32
    Description / Table of Contents: Orwell Lake, in west-central Minnesota, is a flood-control, water-management reservoir first impounded in 1953. Subsequent erosion of the shoreline and a lack of knowledge of slope erosion processes in this region prompted this study to identify and quantify the processes there. The processes were measured at selected sites between June 1980 and June 1983. Erosion of the banks is primarily caused by three processes: rain, frost thaw, and waves. The first two processes tend to move sediment to the base of the steep slopes, forming 4 relatively gentle surface of accumulation. Wave action then tends to move this sediment into the lake. Analysis of the data collected over three years has confirmed that wave action is the dominant erosion process, providing almost 77% of the erosion during the 1981-82 study year. During the 1981 high pool level, 2,089 Mg of sediment, mostly colluvium, was removed from the lower slopes by wave action striking the 1.62 km of eroding shoreline. More than 4,300 Mg was eroded by waves accompanying the higher pool levels of 1982., During years in which the pool level does not exceed 325.5 m in elevation, the colluvium slope builds up at the expense of the steeper slope. But during successive years with higher pool levels, the resulting thin colluvium is quickly eroded. Erosion of the primary sediment, a compact till, then occurs, forming the S typical nearly vertical banks. In winter the upland surface adjacent to the lake freezes to a depth of between 1 and 2 m, depending on the surface temperature, the mow cover, and the distance from exposed banks. In late winter soil aggregates, released by the sublimation of interstitial ice within the banks, begin to accumulate at the base of the slopes, often veneering snowbanks there. Once thaw begins, slab failure of bank sediment is followed by mudflows and earthflows. Thaw failure at Orwell Lake in the winter of 1981-82 accounted for over 20% of the erosion; in the spring of 1982, 824 Mg was eroded by this process and 746 Mg the following spring. Such slope failure is most intense along north-facing banks and considerably less intense on south-facing banks, where more effective desiccation and sublimation reduce the soil moisture content. Summer rainfall is responsible for the remaining 3% of the total erosion, amounting to 102 Mg in 1981 and 208 Mg in 1982. Because the banks are steep and relatively short, rainwash is infrequent; rainsplash is the most consistent process during the summer, but the infrequent storms during which rainwash occurscause greater total erosion. Erosion by rain has increased in each of the past three summers, largely because of increased precipitation. Infrequent massive slope failures (slumps) have occurred at the east end of the lake where a buried clay rich unit is stratigraphically and topographically positioned to favor such failures. Drought years followed by heavy spring rains probably will result in additional slope failures of this type at the east end. Unless changes are made, the banks at Orwell Lake will continue to recede. Restriction of the pool level to less than 325.5-m elevation is the least expensive solution to the problem.
    Type of Medium: Series available for loan
    Pages: ix, 110 Seiten , Illustrationen
    Series Statement: CRREL Report 84-32
    Language: English
    Note: CONTENTS Abstract Preface Summary Chapter 1. Introduction Location Purpose of study Previous work Chapter 2. Methodology Geology Overland erosion Wave erosion Frost penetration and heave Thaw failure Bank recession Ground water Soil moisture Chapter 3. Results Geology Geotechnical properties Overland erosion Wave erosion Freeze-thaw phenomena Ground water fluctuations Other slope failures Chapter 4. Discussion Overland erosion Wave erosion Thaw failure Universal soil loss equation Chapter 5. Summary and conclusions Techniques Erosion processes at Orwell lake Bank recession Literature cited Appendix A1: Average cumulative change of surface at erosion stations #2-12, 1980-81 Appendix A2: Cumulative net changes at overland erosion stations #1-12, 1980-81 Appendix A3: Cumulative net changes at overland erosion stations #1 -12, 198 1-82 Appendix A4: Cumulative average erosion at overland erosion stations #1-12, 1980-81 Appendix AS: Cumulative average erosion at overland erosion stations #1-12, 1981-82 Appendix A6: Cumulative average erosion at overland erosion stations #1 -1 2A, 1982 Appendix B: Dimensions of erosion sections, Orwell Lake, Minnesota Appendix C: Piezometer installation data, Orwell Lake, Minneso
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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-201-84/4
    In: CRREL Report, 84-4
    Description / Table of Contents: Ice problems developed in the Sault Ste. Marie, Michigan, portion of the St. Marys River because of winter navigation. Passing ships and natural influences moved ice from Soo Harbor into Little Rapids Cut in sufficient quantities to jam, cause high water in the harbor, and prevent further ship passage. After physical model and engineering studies, two ice booms with a total span of 1375 ft (419 m) with a 250-ft (76-m) navigation opening between were installed at the head of Little Rapids Cut in 1975. A modest field study program on the booms was conducted for the ensuring four winters to determine ice and boom interaction and the effects of ship passages on the system. Forces on some anchors were recorded and supplemental data were taken by local personnel. Several reports have been written about the booms' early operations. This paper presents four-year summary of the main effects of the booms on ice and ship interaction and vice versa. Throughout the four winter seasons, the small quantities of ice lost over and between the booms were manageable. Ships usually passed through the boom without influencing the boom force levels, but at time they brought about large changes. One boom needed strengthening, and artificial islands were added for upstream ice stability. Coast Guard icebreakers were also a necessary part of winter navigation in this area.
    Type of Medium: Series available for loan
    Pages: iv, 18 Seiten , Illustrationen
    Series Statement: CRREL Report 84-4
    Language: English
    Note: CONTENTS Abstract Preface Introduction St. Marys River Ice problems Remedial measures Field studies Highlights, trends, and major findings Modifications to boom Maximum forces Ship traffic Characteristics Effect of boom forces Effect on ice Conclusion Literature cited Appendix A: Ice boom forces
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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-201-84/5
    In: CRREL Report, 84-5
    Description / Table of Contents: Diatom species composition and relative abundances were determined for ice cores obtained from Weddell Sea pack ice during the October-November 1981 Weddell Polynya Expedition (WEPOLEX). Ice thickness and salinity indicate that the ice was less than one year old. The predominant ice type (70%) was frazil, which has the capacity to mechanically incorporate biological material through nucleation and scavenging. Diatoms were found throughout the length of the cores. Species showed down-core fluctuations in abundance that appeared to be correlated with changes in ice type. Pennate forms were more abundant than centrics, the average ratio being 16:1. Diatom frustules with intact organic material were more abundant (5 billion cells/liter). Differences in species abundances are attributed initially to incorporation of algal cells from a temporally changing water column and subsequently to diatom reproduction within the ice. Scanning electron micrographs illustrating the morphologic characteristics of the predominant species are included.
    Type of Medium: Series available for loan
    Pages: iv, 46 Seiten , Illustrationen
    Series Statement: CRREL Report 84-5
    Language: English
    Note: Contents Abstract Preface Introduction Materials and methods Results Discussion Conclusions Literature cited Appendix A: Taxonomic terms Appendix B: Differences in species composition and abundance in duplicate samples examined under optical and inverted light microscopes Appendix C: Morphologic descriptions and SEM micrographs
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  • 48
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-84/6
    In: CRREL Report, 84-6
    Description / Table of Contents: An expression relating aerosol growth to cold environmental conditions was developed. This was accomplished by solving the diffusion equation with the method of Laplace transformation. The series solution was expressed in terms of the dimensionless parameters K (ratio of vapor density over droplet surface to droplet density), ω (ratio of environmental vapor density at time zero to vapor density over droplet surface), and dimensionless time τ (ratio of product of diffusion coefficient D and time t to square of initial radius of condensation nucleus). To take into account the variation of the vapor density over the surface of an acidic condensation nucleus due to the continuous dilution of the droplet, the solution was obtained by assuming various levels of constant vapor concentration. The final expression [R/R sub o - 1 = 2.4917 x 10 to the minus 18th power) exp(0.0737 θ) (P sub RHS/25) x (100-P sub RHS) τ to the 0.9890 powder] can be used to compute the value of R once the values of initial radius R sub o, relative humidity P sub RH, percent of relative humidity at the droplet surface P sub RHS, and environmental temperature θ are given.
    Type of Medium: Series available for loan
    Pages: vi, 28 Seiten , Illustrationen
    Series Statement: CRREL Report 84-6
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature General background The problem Method of solution Results and discussion Conclusions Literature cited Appendix: Evaluation of rn's in equation 25
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  • 49
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-84/8
    In: CRREL Report, 84-8
    Description / Table of Contents: This report describes the equipment and procedures that were used for acquiring, preparing and testing samples of multi-year sea ice. Techniques and procedures are discussed for testing ice samples in compression and tension at constant strain rates and constant loads, as well as in a conventional triaxial cell. A detailed account is given of the application and measurement of forces and dispiacements on the ice test specimens under these different loading conditions.
    Type of Medium: Series available for loan
    Pages: iv, 43 Seiten , Illustrationen
    Series Statement: CRREL Report 84-8
    Language: English
    Note: CONTENTS Abstract Preface Introduction Test material and test specimens Test material Required dimensions for test specimens Acquisition and preparation of specimens Field core sampling Specimen preparation in the laboratory Application of forces and displacements to uniaxial specimens Compression Tension Squareness imperfections Loading devices Universal testing machine Gas actuator for constant load Weight-and-pulley system for constant tension Equipment for triaxial tests Measurement of force and displacement Force Displacement Readouts and recorders Literature cited Appendix A: Phenolic-resin end caps Appendix B: Compliant platens Appendix C: Theoretical factor for converting overall strain to gauge-length strain indumbbell specimens Appci dix D: Items developed but not used in Phase I Appendix E: Use of the Brazil test
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  • 50
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-84/7
    In: CRREL Report, 84-7
    Description / Table of Contents: Experiments were conducted in CRREL's refrigerated flume facility to examine the two-dimensional force distribution of a floating, fragmented ice cover restrained by a boom in a simulated river channel. To determine the force distribution, a vertically walled channel, instrumented for measuring normal and tangential forces, and an instrumented restraining boom were installed in a 40.0- by 1.3-m flume. Two sizes of polyethylene blocks and two similar sizes of fresh-water ice blocks were tested using water velocities ranging from 10 to 30 cm/s. The forces measured at the instrumented boom leveled off with increasing cover length. The contribution of the increasing shear forces developed along theshorelines to this leveling off in the data was clearly evident. The shear coefficients of the polyethylene blocks averaged 0.43, and the freshwater ice averaged 0.044. The normal force measured along the instrumented shoreline could not be related simply by a K coefficient to the longitudinal force; another expression was required, with a term being a function of the cover thickness and independent of the undercover shear stress or cover length. By adding this term, good agreement was then found between the measured and predicted values of the boom forces and the shoreline normal and shear forces
    Type of Medium: Series available for loan
    Pages: iv, 22 Seiten , Illustrationen
    Series Statement: CRREL Report 84-7
    Language: English
    Note: CONTENTS Abstract Preface Introduction Experiments Test flume facility Experimental apparatus Experimental procedure Results Plastic versus freshwater ice Shoreline forces Boom forces Average shear stress under ice cover Internal forces Discussion Data scatter Summary and conclusions Literature cited Appendix A: Experimental results
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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-201-83/8
    In: CRREL Report, 83-8
    Description / Table of Contents: In the course of model tests with urea-doped ice in the CRREL Ice Engineering Facility test basin, the growth process and the physical and mechanical properties of the model ice were investigated. The parameters which were varied were: urea concentration in the tank water, air temperature during growth, growth duration, and tempering time. Uniformity of ice thickness and ice mechanical properties over the whole tank area were found to be satisfactory. The structure of the urea-doped ice was found to be similar to that of the ice except for a relatively thick incubation layer over a dendritic bottom layer. Empirical relationships were established between: ice thickness and negative degree-hours; mechanical properties and growth temperature, urea concentration, and ice thickness; and reduction in mechanical properties and tempting time. The results of the study are presented in charts which permit reliable scheduling of model tests with required ice thickness and ice flexural strength.
    Type of Medium: Series available for loan
    Pages: vii, 53 Seiten , Illustrationen
    Series Statement: CRREL Report 83-8
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Experimental facility and procedures Ice test basin Ice growth procedure Measurements Ice growth and structure Ice thickness distribution Ice growth during freeze-up Ice growth during warm-up Structure of urea-doped ice Mechanical properties of urea-doped ice Introductory remarks Model of a two-layer elastic material Properties of urea-doped ice during freeze-up Properties of urea-doped ice during warm-up Applications to test program scheduling Summary and conclusions Literature cited Appendix A: Results of ice thickness measurements for various growth conditions Appendix B: Properties of untempered ice Appendix C: Properties of tempered ice
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  • 52
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-84/33
    In: CRREL Report, 84-33
    Description / Table of Contents: A small-scale experimental study was conducted to characterize the magnitude and nature of ice forces during continuous crushing of ice against a rigid, vertical, cylindrical structure. The diameter of the structure was varied from 50 to 500 mm, the relative velocity from 10 to 210 mm/s, and the ice thickness from 50 to 80 mm. The ice tended to fail repetitively, with the frequency of failure termed the characteristic frequency. The characteristic frequency varied linearly with velocity and to a small extent with structure diameter. The size of the damage zone was 10 to 50% of the ice thickness, with an average value of 30%. The maximum and mean normalized ice forces were strongly dependent on the aspect ratio (structure diameter/ice thickness). The forces increased significantly with decreasing aspect ratio, but were constant for large aspect ratios. The maximum normalized forces appeared to be independent of strain rate. The effect of velocity on the normalized ice forces depended on structure diameter. The mean effective pressure or specific energy of ice crushing depended on both aspect ratio and ice-structure relative velocity. The energy required to crush the ice for the one failure cycle was obtained from the ice force records for each test, and was compared to the energy calculated from an idealized sawtooth shape for the force record, the maximum force, velocity and characteristic frequency data. Originator - supplied keywords included: Cold regions, Cold regions construction, Cylindrical test structures, Ice, Ice crushing, Ice forces, and Test facilities.
    Type of Medium: Series available for loan
    Pages: vi, 47 Seiten , Illustrationen
    Series Statement: CRREL Report 84-33
    Language: English
    Note: Contents Abstract Preface Nomenclature Introduction Test objectives Experimental setup and procedures Facilities Test fixture Data acquisiton system Ice sheets Measurement of ice properties Daily test summary Experimental results and discussion Observations Ice force records Frequency of ice force variations Discussion Maximum crushing forces Mean effective pressure or specific energy of ice in crushing Failure energy of ice Ratio of maximum force to mean force Summary and conclusions Literature cited Appendix A: Data for continuous crushing tests
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  • 53
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    Monograph available for loan
    Leipzig : Academy of Sciences of the GDR, Central Institute for Isotope and Radiation Research
    Associated volumes
    Call number: AWI G6-19-93042-2
    In: Interregional Training Course on Radiochemistry, [Supplement]
    Type of Medium: Monograph available for loan
    Pages: 88 Seiten , Illustrationen
    Language: English
    Note: Contents Manual 2.2 The relative measurement of aktivity Lectures 1.3 Statistics / H. Baumbach 2.2 Sealed sources / K. Vormum 2.4 Energy dispersive x-ray fluorescence analysis / H.-K. Bothe 3.1 The use of carriers / H. Koch 4.3 Autoradiography / K. Freyer 6.1 Radiometric methods in environmental control / H.-J. Große
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  • 54
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/41
    In: CRREL Report, 82-41
    Description / Table of Contents: Many of the important factors influencing the choice of appropriate aquifer test procedures are presented. The concepts of bias, accuracy and spatial variabil­ity are explained. The definitions of a number of aquifer parameters are devel­oped from basic principles demonstrating the underlying assumptions and limita­tions. The parameters considered are: piezometric head, hydraulic conductiv­ity/intrinsic permeability, flow direction, specific discharge magnitude, transmissivity, volumetric flow rate, total porosity, effective porosity, aver­age linear velocity, storage coefficient, specific yield, dispersion coefficient-aquifer dispersivity. For each parameter several techniques are described, evaluated and ranked in terms of perceived potential accuracy, simplicity and value to contaminant transport studies. It must be stressed, however, that the evaluations are based principally upon theoretical grounds, and not upon actual conduct of the described procedures.
    Type of Medium: Series available for loan
    Pages: iv, 111 Seiten , Illustrationen
    Series Statement: CRREL Report 82-41
    Language: English
    Note: CONTENTS Abstrac Preface Introduction Purpose Scope Concept of accuracy Test selection Definition of parameters Piezometric head Use of piezometers Hydraulic conductivity Flow direction Specific discharge magnitude Transmissivity Volumetric flow rate Porosity Average linear velocity Storage coefficient-specific yield Aquifer dispersivity Parameter estimation techniques Piezometric head Hydraulic conductivity Direction and magnitude of specific discharge vector Transmissivity Volumetric flow rate Total porosity Average linear velocity Storage coefficient Specific yield Effective porosity Aquifer dispersivity-dispersion coefficients Conclusions Literature cited
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  • 55
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-83/13
    In: CRREL Report, 83-13
    Description / Table of Contents: A review on past experimental and theoretical work indicates a need for additional experimentation to characterize the response of snow to inelastic pressure waves. Pressure data from previously conducted explosion tests are analyzed to estimate the elastic limit of snow of 400 -kg/cu m density to be about 36 kPa. This pressure corresponds to a scaled distance of 1.6 m/cu.rt.kg for charges fired beneath the surface of the snow, and to a scaled distance of 1.2 m/cu.rt.kg for charges fired in the air. The effects of a snow cover on the method of clearing a minefield by using an explosive charge fired in the air above the snow surface are also discussed and recommendations are given for further work in this area. Explosive pressure data are used to estimate the maximum effective scaled radius for detonating buried mines at shallow depth to be 0.8 m/cu.rt.kg. Fuel-air explosive will increase this effective radius significantly because of the increase in the size of the source region.
    Type of Medium: Series available for loan
    Pages: 33 Seiten , Illustrationen
    Series Statement: CRREL Report 83-13
    Language: English
    Note: CONTENTS Abstract Preface List of symbols Introduction Objectives Background Problems in describing the response of snow to an applied stress Methods of determining the dynamic behavior of materials Review of previous studies on snow Experimental measurements on snow Summary of snow experiments Theoretical studies Confirmation of the theory Discussion Applications Recommendations Summary Literature cited Appendix A. Selected data from Wisotski and Snyder (1966) Appendix B. Pressure data from Livingston (1964)
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  • 56
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-84/15
    In: CRREL Report, 84-15
    Description / Table of Contents: Measurements of meltwater pH from annual layers of South Pole firn and ice samples ranging in age from 40 to 2000 years B.P. show that precipitation at this remote site has a higher natural acidity than that expected from atmospheric equilibrium with CO2. The average pH of deaerated (CO2-free) samples was 5.64 + or - 0.08, while air-equilibrated samples averaged 5.37 + or - 0.008, a pH that is about a factor of two more acidic than the expected background pH of 5.65. The observed 'excess' acidity can be accounted for by natural SO4(2)- and NO(3)- levels in the samples probably originating from non-anthropogenic H2SO4 and HNO3. Because of the presence of these naturally occurring acids in South Pole precipitation, a pH of 5.4 is considered a more representative baseline reference pH for acid precipitation studies.
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    Pages: ii, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 84-15
    Language: English
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  • 57
    Call number: ZSP-201-84/16
    In: CRREL Report, 84-16
    Description / Table of Contents: Phase composition curves are presented for a typical saline silt from Lanzhou, P.R.C., and compared to some silts from Alaska. The unfrozen water content of the Chinese silt is much higher than that of the Alaskan silts due to the large amount of soluble salts present in the silts from China, which are not present in silt from interior Alaska. When the salt is removed, the unfrozen water content is then similar for both the Chinese and Alaskan silt. Here we introduce a technique for correcting the unfrozen water content of partially frozen soils due to high salt concentrations. We calculate the equivalent molality of the salts in the unfrozen water at various temperatures from a measurement of the electrical conductivity of the extract from saturated paste.
    Type of Medium: Series available for loan
    Pages: iii, 25 Seiten , Illustrationen
    Series Statement: CRREL Report 84-16
    Language: English
    Note: Contents Abstract Preface Introduction Background Materials Sample preparation Nuclear magnetic resonance Specific surface area Electrical conductivity Results and discussion Summary Literature cited Appendix A: Unfrozen water content vs temperature data for Lanzhou silt
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  • 58
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-84/12
    In: CRREL Report, 84-12
    Description / Table of Contents: Icing on stationary structures such as oil rigs is becoming an increasingly serious problem as offshore drilling operations in the subpolar regions become more common. Little information exists on this subject. Extensive observations have been made of icing on the upper structures of moving ships, but the complexity of this problem makes analysis of the results very difficult. Even the generation of water drops in this case involves many factors, such as windspeed, wave direction relative to the bearing of the ship, and size and free-board of the ship. On stationary structures, however, the problem is much simpler, since the major factor in drop generation is whitecaps produced by wind, and no motion of the structure is involved. In the present study, a theoretical calculation was made by combining the data available on the generation of drops by wind with data on the proportion of ice frozen from the collected water. The rate of ice accumulation on stationary structures was calculated using published data. The results were compared with icing measured on board ships. Although the general trend of this calculation indicated parallelism with the onboard measurements, the measured ice accumulation rate on ships needed a 5 to 8 m/s higher windspeed to correspond with the calculated rate for stationary structures.
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    Pages: ii, 13 Seiten , Illustrationen
    Series Statement: CRREL Report 84-12
    Language: English
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  • 59
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-84/11
    In: CRREL Report, 84-11
    Description / Table of Contents: Data obtained from two sets of data buoys either air-dropped or deployed by ship onto the Weddell Sea pack ice during the period from Dec 1978 to Nov 1980 are presented. The buoy data include position, pressure and temperature information and to date represent the most complete combined weather and pack ice drift records for the ice-covered Southern Ocean regions. The buoys tended to drift north initially and then to turn east generally between latitudes 62°S and 64°S. Buoy 1433 turned east farther south at approximately 67°S but at about the same time as buoy 0527, implying that the westerly wind belt was farther south than usual in 1979. The range of air pressures-from about 950 mb to about 1020 mb is typical of the circumpolar low pressure trough in the Southern Hemisphere. All buoys were equipped with an internal or compartment temperature sensor. The 1980 buoys also contained an external air temperature sensor in a ventilated, shielded can at 1-m height. Although differences of 10°C or more between recorded air and compartment temperatures are common, the correlation between the two measured temperatures is generally very good. The compartment temperatures are higher probably because the buoy is radiationally heated. We found that subtracting 3°C from the average daily compartment temperature yielded a good estimate of the average air temperature for any given day. This technique can be used to construct average daily air temperature records for the 1979 buoys which only contained the internal or compartment temperature sensor.
    Type of Medium: Series available for loan
    Pages: v, 21 Seiten , Illustrationen
    Series Statement: CRREL Report 84-11
    Language: English
    Note: CONTENTS Abstract Preface Introduction Methods and instrumentation Results Drift tracks Pressure data Temperature data Discussion Conclusions Literature cited
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  • 60
    Call number: ZSP-201-84/9
    In: CRREL Report, 84-9
    Description / Table of Contents: This report presents the results of the first phase of a test program designed to obtain a comprehensive understanding of the mechanical properties of multi-year sea ice from the Alaskan Beaufort Sea. In Phase I, 222 constant-strain-rate uni-axial compression tests were performed on ice samples from ten multi-year pressure ridges to examine the magnitude and variation of ice strength within and between pressure ridges. A limited number of constant-strain-rate compression and tension tests, constant-load compression tests, and conventional triaxial tests were also performed on ice samples from a multi-year floe to provide preliminary data for developing ice yield criteria and constitutive laws for multi-year sea ice. Data are presented on the strength, failure strain, and modulus of multi-year sea ice under different loading conditions. The statistical variation of ice strength within and between pressure ridges is examined, as well as the effects of ice temperature, porosity, structure, strain rate and confining pressure on the mechanical properties of multi-year sea ice.
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    Pages: v, 107 Seiten , Illustrationen
    Series Statement: CRREL Report 84-9
    Language: English
    Note: CONTENTS Abstract Preface Introduction Field Sampling Site selection and description Ice sampling procedures Shipping and storage of ice samples Testing Techniques Multi-year Pressure Ridge Tests Ice description Sampling scheme and test variables Uniaxial compressive strength Residual compressive strength Failure strains Initial tangent modulus Statistical Variations in Ice Strength Differences in strength above and below level ice Sources of the variation in strength Shape of the strength histograms Multi-year Floe Ice Tests Ice description Uniaxial compressive strength Constant-load compression tests Constant-strain-rate tension tests Triaxial tests Conclusions Literature Cited Appendix A: Structural profile of a multi-year pressure ridge core Appendix B: Ridge uniaxial compression test data Appendix C: Structural profile of the continuous multi-year floe core Appendix D: Multi-year floe test data
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  • 61
    Call number: ZSP-201-82/19
    In: CRREL Report, 82-19
    Description / Table of Contents: Under proper design and management, a forest ecosystem in the central United States should renovate municipal wastewater as long or longer than conventional agricultural systems, especially when design limitations are hydraulic loading rate, heavy metals, P and N. Forest systems require smaller buffer zones than agricultural systems and lower sprinkler pressures. Immature forests are better wastewater renovators than mature forests.
    Type of Medium: Series available for loan
    Pages: iv, 22 Seiten , Illustrationen
    Series Statement: CRREL Report 82-19
    Language: English
    Note: CONTENTS Abstract Preface Introduction Forest systems design Pretreatment Distribution systems Public health considerations Buffer zone requirements Toxic effects Public access Hydraulic loading Nutrient uptake and loading Introduction Nitrogen Phosphorus Trace metals Design considerations Hydraulic loading rates Nitrogen loading rates Forest management options Reforestation Existing forest ecosystems Short term rotation plantations Potential long term effects on forest ecosystems Longevity of forest systems Consequences of overloading Soil chemical, physical and hydrologic properties Productivity Summary Literature cited
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  • 62
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/17
    In: CRREL Report, 82-17
    Description / Table of Contents: Seismic P and SH wave refraction experiments at the NATO RSG-11 test site in Munster Nord, Federal Republic of Germany, reveal the presence of a nearly horizontal, three-layer velocity structure. The upper layer, composed of un­consolidated glacial till, is 1 m thick and has P (compressional) and SH (shear-horizontal) wave velocities of 240 and 165 m s-1. The second layer, made up of similar, more compacted material, is 9.5 m thick, with a P wave velocity of 470 m s-1 and an SH wave velocity of 275 m s-1. The third layer, interpreted as the groundwater table, is located at a depth of 10.5 m and has a P wave velocity of 1590 m s-1. The SH wave velocity of this layer is controlled by the matrix material and is the same as that of the second layer. A single, unreversed observation indicated a fourth layer at a depth of about 20 m, but the existence of this layer remains unconfirmed. The observed fundamental mode Love wave dispersion is in agreement with the theoretical dispersion predicted by the refraction velocities. Computed partial derivatives of phase velocity with respect to shear wave velocity show, for the frequencies observed, that the dispersion confirms the thicknesses and velocities of the two upper layers and is not affected by the deeper structure.
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    Pages: iv, 33 Seiten , Illustrationen
    Series Statement: CRREL Report 82-17
    Language: English
    Note: CONTENTS Abstract Preface Introduction Refraction experiments Procedure Equipment Results P waves Low velocity zone SH waves Surface wave experiments Summary and discussion Literature cited Appendix A: P wave refraction data Appendix B: SH wave refraction data. Appendix C: Surface wave dispersion calculations
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  • 63
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-82/16
    In: CRREL Report, 82-16
    Description / Table of Contents: Abstract: A dynamic-thermodynamic sea ice model which employs a viscous-plastic constitutive law has been applied to the East Greenland area. The model is run on a 40-km spatial scale at 1/4-day time steps for a 60-day period with forcing data beginning on 1 October 1979. Results tend to verify that the model predicts reasonable thicknesses and velocities within the ice margin. Thermodynamic ice growth produces excessive ice extent, however, probably due to inadequate parameterization of oceanic heat flux. Ice velocities near the free ice edge are also not well simulated, and preliminary investigations attribute this to an improper wind field in this area. A simulation which neglects ice strength, effectively damping ice interaction with itself and allowing no resistance to deformation, produces excessive ice drift toward the coast and results in unrealistic nearshore thicknesses. A dynamics-only simulation produced reasonable results, including a more realistic ice extent, but the need for proper thermodynamics is also apparent. Other simulations verify that ice import from the Arctic Basin, and ice transport due to winds and currents, were also important components in the model studies.
    Type of Medium: Series available for loan
    Pages: v, 40 Seiten , Illustrationen , 29 cm
    Series Statement: CRREL Report 82-16
    Language: English
    Note: CONTENTS Abstract Preface Introduction Model description and application Results and discussion Wind and current fields Standard simulation Thermodynamic simulation Zero ice strength Zero ice import Zero currents Modified currents Zero winds Dynamics simulation Summary and concluding remarks Literature cite
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  • 64
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-202-106
    In: Research report / Cold Regions Research and Engineering Laboratory, 106
    Description / Table of Contents: From the Preface: This paper presents a method for determining the extent of heat transfer due to vapor transfer in snow with air flowing through it, which could be useful in connection with studies concerning the changes of physical and mechanical properties of a snow cover caused by temperature gradients and wind currents.
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    Pages: iv, 8, A2, B2, C4 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 106
    Language: English
    Note: CONTENTS Summary Introduction Theory Experimental apparatus apd procedures Results and discussion References Appendix A: Evaluation of d^2Ps/dx^2, dps/dx Appendix B: Sample calculations of β0, β, and De Appendix C: Experimental results and calculated data
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  • 65
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    Call number: ZSP-202-109
    In: Research report / Cold Regions Research and Engineering Laboratory, 109
    Description / Table of Contents: Summary: The present paper contains a critical study of a number of foundation models suggested by various investigators, as well as a further development of some of the ideas involved. It is found that the model by Pasternak is the most natural extension of the Winkler foundation. It is also shown that the "non-solvability" of the problem of a finite bean or plate resting on a continuous foundation as posed by Wieghardt and further elaborated by Pflanz is not correct, and that problems of this type are solvable for any load distribution permissible in classical plate theory. The paper concludes with derivations of differential equations for plates resting on viscous and viscoelastic foundations, which may be used for solving problems involving compacted snow and permafrost bases.
    Type of Medium: Series available for loan
    Pages: iv, 15 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 109
    Language: English
    Note: CONTENTS Preface Summary Introduction The Hetényi foundation The Filonenko-Borodich foundation The Pasternak foundation Plates on a Pasternak foundation Visco-elastic Pasternak foundation Plates on visco-elastic foundations References Appendix A: Notation
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  • 66
    Call number: ZSP-202-111,2
    In: Research report / Cold Regions Research and Engineering Laboratory, 111,2
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    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 111,2
    Language: English
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  • 67
    Call number: ZSP-201-81/15
    In: CRREL Report, 81-15
    Description / Table of Contents: This report analyzes the results of a field study previously reported by Scrivner et al. (1969) for the National Cooperative Highway Research Program. These authors studied the seasonal pavement deflection characteristics of 24 test sites on roads in service in regions with freezing indexes ranging from 100 F-days to 2100 F-days. They used the Dynaflect cyclic pavement loading device to determine the pavement system response. Of specific interest to my analysis was the increased pavement deflection after freezing and thawing and the time to recovery of normal deflection characteristics. These characteristics were related to soil and climatic factors using statistical techniques. The most significant observations of this statistical analysis are: (1) that the freezing index is not a significant parameter in determining the percent increase in pavement deflection during thawing, and (2) that the recovery time is inversely proportional to the depth of freezing. As was expected, the most significant variable affecting the increase in pavement deflection was the frost susceptibility classification. This observation reinforces the necessity for careful selection of soil materials used in pavement systems.
    Type of Medium: Series available for loan
    Pages: v, 10 Seiten , Ilustrationen
    Series Statement: CRREL Report 81-15
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Description of test site Test results Method of analysis Results of analysis Change in resilient deflection due to thawing, A Recovery time after onset of thawing, t20 Discussion of results Change in resilient deflection due to thawing, A. Recovery time after thawing, t20 Conclusions Literature cited ILLUSTRATIONS Figure Pavement deflection and frost penetration vs time Data points and regression line for A and t2 0 versus F Data points and regression line for A and t2 0 versus W Data points and regression line for A and t2 0 versus I Data points and regression line for A and t20 versus N Data points and regression line for A and t20 versus D Data points and regression line for t20 versus A Permeability vs void ratio for the Toledo Penn 7 material TABLES Properties of test sections Test results from Scrivner et al Results of regression analysis
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  • 68
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-81/5
    In: CRREL Report, 81-5
    Type of Medium: Series available for loan
    Pages: 27 Seiten , Illustrationen
    Series Statement: CRREL Report 81-5
    Language: English
    Note: CONTENTS Abstract Preface Introduction Test setup Test results The USCGC Mackinaw The Roger Slough The Cason J. Callaway The imperial St. Clair Vibration levels Discussion Frequency content Magnitude Mode of transmission Opening the channel Flexural waves Duration and occurrence of maximum vibrations Effect of weather Conclusions and recommendations Literature cited
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  • 69
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-81/19
    In: CRREL Report, 81-19
    Description / Table of Contents: Field observations support the interpretation that differences in the strength of radar returns from the ice covers of lakes on the North Slope of Alaska can be used to determine where the lake is frozen completely to the bottom. An ice/frozen soil interface is indicated by a weak return and an ice/ water interface by a strong return. The immediate value of this result is that SLAR (side-looking airborne radar) imagery can now be used to prepare maps of large areas of the North Slope showing where the lakes are shallower or deeper than 1.7m (the approximate draft of the lake ice at the time of the SLAR flights). The bathymetry of these shallow lakes is largely unknown and is not obvious from their sizes or outlines. Such information could be very useful, for example in finding suitable year-round water supplies.
    Type of Medium: Series available for loan
    Pages: iii, 17 Seiten , Illustrationen
    Series Statement: CRREL Report 81-19
    Language: English
    Note: CONTENTS Abstract Preface Introduction The experiment Results Maps of completely frozen North Slope lakes Literature cited
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  • 70
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-81/18
    In: CRREL Report, 81-18
    Description / Table of Contents: During the growing seasons of 1977, 1978, and 1979, revegetation techniques were studied on the Chena River Lakes Project, a flood control dam and levee near Fairbanks, Alaska, to find an optimal treatment for establishing permanent vegetation cover on the gravel structures. The treatments tested on plots at the dam andor levee involved three main variables 1 vegetation grass and clover seed andor willow cuttings, 2 mulch, mulch blanket, andor sludge, and 3 substrate gravel or fine-grained soil over the gravel base. The mulches were hay, wood-cellulose-fiber, peat moss, and Conwed Hydro Mulch 2000, which is a wood-cellulose-fiber mulch with a polysaccharide tackifier. A constant rate of fertilizer was applied to all plots except the control. A section of each plot was refertilized again in their third growing season to compare annual and biannual fertilization. The high fertilization rate produced above-average growth. Fescue, brome, and foxtail were the most productive species on the dam, while alsike cover was the most productive on the wetter levee site. When grass seed and willow cuttings were planted at the same time, willow survival and growth were reduced. Fertilization is required for at least two years to produce an acceptable permanent vegetation cover, although fine- grained soil or sludge reduces the amount of fertilizer needed in the second year. Third-year fertilization may not be necessary since the benefits of the second fertilization continue for at least two years. A sludge treatment refertilized during its second growing season produces the highest biomass recorded in this study.
    Type of Medium: Series available for loan
    Pages: ix, 59 Seiten , Illustrationen
    Series Statement: CRREL Report 81-18
    Language: English
    Note: CONTENTS Abstract Preface Abbreviations Conversion factors Summary Introduction Background Site characterization Climate Purpose Materials and methods General Moose Creek Dam site Tanana Levee site Sampling and measurement Abiotic controls on vegetation Meteorological data Soil moisture as a limiting factor Soil chemical analysis Vegetation growth and survival Moose Creek Dam site Tanana Levee site Biomass by species Roof penetration Seedling density of invading woody species Weeds Supplemental observations Sediment loss Sludge and runoff-water composition Cost analysis Conclusions Literature cited Appendix A: 1977 grass growth on 1977 dam treatments Appendix B: 1978 grass growth on 1977 dam treatments Appendix C: 1979 grass growth on 1977 dam treatments Appendix D: Grass growth on 1978 dam treatments Appendix E: 1977, 1978, and 1979 survival of willow treatments Appendix F: Grass growth on Tanana levee treatments Appendix C: Chemical analysis of sludge and runoff water
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  • 71
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-81/22
    In: CRREL Report, 81-22
    Description / Table of Contents: Development of the hydropower potential of Bradley Lake, Alaska, would greatly increase winter freshwater discharge from the Bradley River into Kachemak Bay, which may result in increased ice formation and related ice-induced problems. The objectives of this investigation were to describe winter surface circulation in the bay and document ice distribution patterns for predicting where additional ice might be transported if it forms. Landsat MSS bands 5 and 7 and RBV imagery with 70% cloud cover or less, taken between 1 November and 30 April each year from 1972 to 1980, were analyzed. Surface circulation patterns inferred from suspended sediment patterns and ice distribution and movement were observed and mapped from the Landsat imagery. The generalized circulation patterns indicate that any additional ice formed due to future increased winter discharge from Bradley River would be likely to accumulate along Homer Spit and to be blown into the outer bay by the dominant northerly winter winds.
    Type of Medium: Series available for loan
    Pages: vi, 43 Seiten , Illustrationen
    Series Statement: CRREL Report 81-22
    Language: English
    Note: CONTENTS Abstract Preface Metric conversion factors Introduction Physical setting Hydrology Climate Bathymetry PhysIcal oceanography Wind effects on circulatIon Previous investigations Approach Imagery analyzed Wind and tidal data Results Suspended sediment patterns Ice distribution Generaltzed surface circulation Conclusions Literature cited Appendix A. Keys to Figures 2, 3 and 4 Appendix B. Observations made from usable Landsat Imagery Appendix C. Selected landsat images used to make observations and interpretations of surface water patterns and ice distribution
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  • 72
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-81/24
    In: CRREL Report, 81-24
    Description / Table of Contents: This report develops a method of analysis for heat transmission systems operating under district heating load conditions. The method accounts for the effects of heat source and load characteristics. The use of thermal energy storage systems is outlined and advantages are given. The transmission model itself considers the following technical aspects: (1) frictional pressure losses in piping system, (2) pump characteristics, (3) pump driver characteristics, and (4) heat losses from the buried piping. The capital costs considered are the piping system and necessary pumps. Operation and maintenance costs include cost of heat loss and cost of pumping energy input. Allowances are also made for system maintenance and repair over the assumed lifetime.
    Type of Medium: Series available for loan
    Pages: vii, 53 Seiten , Illustrationen
    Series Statement: CRREL Report 81-24
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Modes of heat transmission History and state of the art Technical aspects of heat transmission systems Heat sources Space heating loads Thermal energy storage Fluid dynamics considerations Pump drivers Buried piping systems Economic aspects of heat transmission systems Capital costs Operation and maintenance costs Problem formulation Criteria for the optimum solution The objective function Problem solution The response surface Methods of solution Sample results, conclusions and suggestions for future work Results from model calculations Conclusions and suggestions for future work Literature cited Appendix A: Computer program listing
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  • 73
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-81/26
    In: CRREL Report, 81-26
    In: Mechanics of cutting and boring, Part 7
    Description / Table of Contents: Abstract: This report deals with force, torque, energy and power in machines such as drills and boring devices, where the cutting head rotates about a central axis while penetrating parallel to that axis. Starting from a cosideration of the forces developed on individual cutting tools, or segments of cutters, the thrust and torque on a complete cutting head is assessed, and simple relationships between thrust and torque are derived. Similarly, the energy and power needed to drive the cutting head arc estimated and related to tool characteristics. Design characteristics of existing machines are compiled and analyzed to give indications of thrust, torque, power, effective tool forces, nominal thrust pressure, power density, and specific energy.
    Type of Medium: Series available for loan
    Pages: iv, 38 Seiten , Illustrationen
    Series Statement: CRREL Report 81-26
    Language: English
    Note: CONTENTS Abstract Preface Foreword Introduction Terminology Tool forces Parallel motion tools Indentation tools Head thrust, thrust per unit width, and nominal head pressure Power and power density Torque Specific energy Efficiency and performance index Power requirements for clearance of cuttings Minimum power requirements for lifting cuttings in a vertical hole Power consumption and efficiency in continuous-flight augers Air circulation Mud circulation Literature cited Appendix A: Vertical conveyance by continuous-fiight augers Appendix B: Surface areas on a helical flight and its stem
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  • 74
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-81/27
    In: CRREL Report, 81-27
    Description / Table of Contents: Existing classifications for deposits in the glacial environment are inadequate and inconsistent. Deposits should be classified both descriptively and genetically; adequate descriptive classifications already exist. A major problem for previous genetic classifications has been that glacial deposition and the resulting deposits' properties were poorly understood. On the basis of three criteria-sediment source, uniqueness to the glacial environment, and preservation of glacier-derived properties-deposits in the glacial environment result from either of two groups of processes: primary or secondary. Primary processes release the debris of the glacier directly and form deposits that may bear properties related to the glacier and its mechanics. Their deposits are classified genetically as till and are the only deposits indicative of glaciation. In contrast, secondary processes mobilize, rework, transport and resediment debris and deposits in the glacial environment. They develop new, nonglacial properties in their deposits, while destroying or substantially modifying glacier-derived properties. Interpretation of their properties may provide information on the depositional are classified genetically according to the depositional process just as they are in other sedimentary environments. This genetic classification differs from previous classifications in that not all diamictons deposited in the glacial environment are classified as till; it is based strictly on process-related criteria. The origin of properties of glacial deposits in relation to the glacier's mechanics and environment must be recognized if the mechanisms and depositional processes of former glaciers are to be precisely understood.
    Type of Medium: Series available for loan
    Pages: iii, 16 Seiten , Illustrationen
    Series Statement: CRREL Report 81-27
    Language: English
    Note: CONTENTS Abstract Preface Introduction Criteria for process grouping Depositional processes Deposit groups-tills and nontills Comparison of melt-out and sediment flow Melt-out Sediment flow Classification of glacial deposits Conclusions Literature cited
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  • 75
    Call number: AWI S1-18-91339
    Type of Medium: Monograph available for loan
    Pages: 608 S.
    Edition: 4. ed., repr.
    Language: English
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  • 76
    Call number: ZSP-980-89 ; ZSP-980-89(2. Ex.)
    In: ZfI-Mitteilungen ; 89, Nr. 89
    Type of Medium: Series available for loan
    Pages: 132 S. , Ill., graph. Darst., Kt.
    ISSN: 0323-8776
    Series Statement: ZfI-Mitteilungen 89
    Language: English
    Note: Contents: Preface. - Tritium in Antarctic precipitation - information on global distribution / D. Hebert. - On the physical geography of the Schirmacher Oasis (East Antarctica, Dronning Maud Land) / W. Richter. - Investigation of Deuterium concentration relations between atmospheric water vapour and precipitations in the Schirmacher Oasis, East Antarctica / P. Kowski. - Isotope-hydrological and hydrochemical characterization of lakes in the Schirmacher Oasis (East Antarctica) / W. Richter, U. Wand, G. Strauch, P. Kowski, W. Kurze. - Isotope-hydrological and hydrochemical studies of the interior Antarctic lake "Untersee" in the Wohlthat Massif, Dronning Maud Land, East Antarctica / W.-D. Hermichen, M. Crelle, P. Kowski, W. Kurze, U. Wand. - The isotope-glaciological situation in the surroundings of the Schirmacher Oasis/Dronning Maud Land - a first overview / W.-D. Hermichen, P. Kowski, G. Strauch. - Radiocarbon dating of breeding places of petrels in the Antarctic / A. Hiller, U. Wand. - K - Ar dating of basalt dykes in the Schirmacher Oasis, Dronning Maud Land, East Antarctica / G. Kaiser, U. Wand.
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  • 77
    Monograph available for loan
    Monograph available for loan
    Amsterdam [u.a.] : Elsevier Scientific Publ.
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    Call number: AWI Bio-99-0079-2
    In: The Northwest European Pollen Flora, II
    Type of Medium: Monograph available for loan
    Pages: V, 265 S. , zahlr. Ill.
    ISBN: 0444418806
    Language: English
    Note: CONTENTS: Preface / G. C. S. Clarke and W. Punt. - 8. Solanaceae / W. Punt and M. Monna-Brands. - 9. Saxifragaceae / A. A. M. L. Verbeek-Reuvers. - 10. Boraginaceae / G. C. S. Clarke. - 11. Escalloniaceae / A. A. M. L. Verbeek-Reuvers. - 12. Grossulariaceae / A.A.M.L. Verbeek-Reuvers. - 13. Hydrangeaceae / A. A. M. L. Verbeek-Reuvers. - 14. Parnassiaceae / A. A. M. L. Verbeek-Reuvers. - 15. Plantaginaceae / G. C. S. Clarke and M. R.Jones. - 16. Valerianaceae / G. C. S. Clarke and M. R. Jones. - 17. Aceraceae / G. C. S. Clarke and M. R. Jones. - 18. Hippuridaceae / M. S. Engel. - 19. Haloragaceae / M. S. Engel. - 20. Papaveraceae / A. J. Kalis. - Index. - Errata.
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  • 78
    Call number: ZSP-980-80
    In: ZfI-Mitteilungen, Nr. 80
    Type of Medium: Series available for loan
    Pages: 158 Seiten , Illustrationen
    Edition: als Manuskript gedruckt
    ISSN: 0323-8776
    Series Statement: ZfI-Mitteilungen 80
    Language: German , Russian , English
    Note: Inhaltsverzeichnis: ZUSAMMENFASSUNGEN DER VORTRÄGE. - Beiträge der Isotopengeologie zur Aufklärung des kontinentalen Wachstums / K. Wetzel. - Ein quantitatives Modell des Schwefelkreislaufes mit Berücksichtigung der Isotopenverhältnisse / G. Weise, K. Wetzel. - Die Prozesse der Stoffumwandlungen in den Anfangsstadien der Erbildung und die Isotopenzusammensetzung des endogenen Stickstoffs / W. F. Wolynez. - Problema juvenil'nosti v izotopnoj geologii / Ju. A. Borščevskij. - Zur Theorie von Isotopenaustauschgleichgewichten in komplizierten natürlichen Systemen / R. Haberlandt, G. Christoph. - Zur Berechnung und Interpretation natürlicher Isotopenvariationen in Alumosilikaten / G. Christoph. - The use of statistical mechanical perturbation theory for the calculation and interpretation of isotopic fractionation factors / M. Wolfsberg. - Relationship between anomalies in the relative abundance of 18O, 17O, 16O and anomalies in the temperature dependence of isotopic fractionation factors / M. Wolfsberg. - Metod rasčeta izotopnych effektov v prirodnych mineralach po približennoj modeli "Razdel'nych Kolebanin" / S. I. Gol'šev, N. L. Padalko. - Intramolekulare Sauerstoffisotopengeothermometrie an Hydrosilicaten / H. Schütze. - Der 18O-Index. Ein isotopengeochemisches Konzept / H. Schütze. - Matematičeskii analiz frakcionirovanija izotopov ugleroda v živoi kletke / A. A. Ivlev. - Anwendung der modifizierten Zelltheorie zur Berechnung von Zustandseigenschaften dichter isotopensubstituierter Fluide / H.-L. Vörtler, J. Heybey. - Statistisch-mechanische Behandlung der Unterschiede im Adsorptionsverhalten isotopischer Spezies / H. Heybey, H.-L. Vörtler. - Theoretische Untersuchungen zu Adsorptionsisotopieeffekten von Erdgaskomponenten unter erhöhten Drücken / J. Heybey, P. Harting. - Experimentelle Untersuchungen zu speziellen Adsorptionsisotopieeffekten unter geologischen Bedingungen / P. Harting, K. Weingart, H. Heybey. - Die Isotopenzusammensetzung (O, H, C, S, N) des Erdmantels / H. Hoefs. - Neodym- und Strontiumisotope und ihre Anwendung auf TR-Mineralisation / S. B. Brandt, W. S. Lepin, W. N. Solodjankina, T. I. Kolosnizyna. - Zur Veränderung der isotopischen Zusammensetzung des Sauerstoffs von Cherts und Carbonaten im Prozess der Diagenese/Metamorphose / O. Gebhardt, H. Schütze. - The isotopic study of Boron in the process of formation of ore deposits / V. I. Ustinov, V. A. Grinenko, S. M. Aleksandrov, T. R. Ivanova. - Temperaturnyj profil' redkometal'nogo mestoroždenija po izotopno-kislorodnym dannym / Ju. A. Borščevskij, S. N. Gavrikova, N. I. Medvedovskaja, V. Ja. Fedčuk. - Biogennye faktory forminrovanija izotopnogo sostava ugleroda organičeskogo veščestva porod facial'no-genetičeskogo tipa / A. A. Ivlev, R. G. Pankina, M. V. Dachnova. - Izotopnyj sostav ugleroda frakcij nefti i organičeskogo veščestva porod / M. G. Frik, Ė. M. Galimov. - Stable isotope ratios in natural gas components separated by gas chromatography / G. Hut. - C-Isotopenuntersuchungen zur Entwicklung des Altpaläozoikums im Thüringischen Schiefergebirge / K. Hahne, I. Maaß, H. Lützner, J. Ellenberg, F. Falk, E. Grumbt. - Isotopengeochemische, thermobarogeochemische und elementgeochemische Untersuchungen an einer hydrothermalen Fluorit-Mineralisaton aus dem Südteil der DDR / G. Strauch, H. Kämpf, R. Thomas, M. Geisler, G. Haase, G. Stiehl. - Untersuchungen zur Isotopenfraktionierung des Stickstoffs in den Systemen NH4+/NH3 und N3- /N2 / H.-M. Nitzsche, G. Stiehl. - δ15N-Profile in der Bodenzone und ihre zeitlichen Veränderungen / H. Hübner. - Izotopnyj sostav ugleroda karbonatov v mestoroždenijach samorodnoj sery / V. I. Kityk, B. I. Srebrodol'skij. - Untersuchungen zur Fraktionierung der Schwefelisotope bei der chemischen und biochemischen Oxydation von Sulfid zu Sulfat / I. Maaß, J. Heyer, K. Wetzel, G. Weise. - Selective determination of quantitative and isotopic composition of sulphur-minerals associations / V. I. Ustinov, V. A. Grinenko. - Untersuchungen zur CO2-Resorption aus thermoindifferenten Kohledioxidmineralwasserbädern durch die Haut des Menschen / G. Hübner, I. Maaß, C. Epperlein, G. Plötner, H. Jordan. - Frakcionirovanie izotopov ugleroda metanobrazujušimi bakterijami pri ich roste na različnych substratach / M. V. Ivanov, S. S. Beljaev, A. M. Ėjakun, V. A. Boidar', K. S. Laurinavičus, O. V. Šipin. - Izotopnyj sostav ugleroda metana, obrazuemogo mikroorganizmami v prirode / M. V. Ivanov, K. S. Laurinavičus, V. A. Bondar', S. S. Beljaev. - Isotopenhydrologische Untersuchungen - Arbeiten aus dem GSF-Institut für Radiohydrometrie / H. Moser. - Tritium im Niederschlag Antarktikas - Aussagen zur globalen Verteilung / D. Herbert. - Untersuchung der Beziehung der Deuteriumkonzentration zwischen atmosphärischem Wasserdampf und Niederschlägen im Gebiet der Schirmacheroase / Ostantarktis / P. Kowski. - Isotopenhydrologische und hydeochemische Charakterisierung von Seen im Gebiet der Schirmacher-Oase, Ostantarktika / W. Richter, U. Wand, G. Strauch, P. Kowski, W. Kurze. - Isotopenglaziologische Untersuchungen zur Klärung der Herkunft des Inlandeiskörpers südlich der Schirmacheroase / Ostantarktis / W.-D. Hermichen, P. Kowski. - Carbon-13 in atmospheric CO2: 1977-1981 / W. G. Mook, C. D. Keeling. - Anwendung von H2 18O auf ökologische und pflanzenphysiologische Fragestellungen / H. Förstel. - Komplexe Isotopenuntersuchungen an armenischen Mineralwässern / R. Trettin, A. Hiller, E. S. Chalatjan. - Die isotope Zusammensetzung des Kristallwassers von Carnalliten und ihrer Ausgangslösungen / H.-D. Schmiedl, K. Koch, T. Böttger, G. Stiehl, J. Pilot. - Zur hydrologischen Interpretation von Isotopendaten im Zusammenhang mit Stofftransportvorgängen / H. Jordan, D. Hebert, K. Fröhlich, R. Gellermann, R.-P. Schols. - Zwei neue Standards zur massenspektrometrischen Isotopenhäufigkeitsbestimmung von Wasserstoff, Kohlenstoff und Sauerstoff im Bereich natürlicher Häufigkeiten / M. Herrmann, H. Gerstenberger. - Methoden der chemischen Konzentrierung und Identifizierung bei der Suche nach seltenen Radionukliden in der Natur / H. Bruchertseifer. - Die Anwendung der ultraempfindlichen Massenspektrometrie zur Isotopenanalytik / H.-J. Dietze, S. Becker. - Möglichkeiten des Nachweises superschwerer Elemente mit massenspektrometrischen Methoden / S. Becker, H.-J. Dietze. - Isotope analysis on nano-mole gas samples / S. Hałas. - Neue Möglichkeiten zur Freisetzung von Messgasen für die massenspektrometrische Isotopenanalysis aus Feststoffen / G. Müller, D. Hessel, H. Zahn, K. Mühle. - Die Kontrolle der Standardmeßbedingungen bei C-14-Datierungen / J. Görsdorf. - Raspredelenie izotopa 14C v različnych uglerodsoderžaščich materialach i frakcijach paleopočv v svjazi s geologičeskimi uslovijami zachoronečnija / L. A. Orlova, V. A. Panyčev, I. V. Nikolaeva. - Some variations in the isotopic composition of uranogenic and thorogenic lead and their significance for investigations of geochronology and genesis of ore and rocks / B. G. Amov. - Neue Daten für die Beiisotopenverhältnisse in Feldspäten aus dem Kristallinkomplex, den Graniten und Erzen Südbulgariens / B. Amow, V. Arnaudow, Z. Baldjiewa, M. Pawlowa. - 40Ar/39Ar-Altersspektren eines Biotits / G. Kaiser, J. Pilot. - Kalium-Calcium-Isochronen für Sylvinite des sibirischen Tafellandes / W. S. Lepin, T. W. Jegorowa, S. B. Brandt. - Beitrag zur Klärung der Genese west- und mittelerzgebirigischer Granite anhand von SR-87/SR-86-Verhältnissen / H. Gerstenberger, G. Haase. - Zur geochronologisch-genetischen Modellierung von Granitoiden im Westerzgebirge und Vogtland / Th. Kaemmel. - Zur Abschätzung von Altersunterschieden innerhalb des Erzgebirgsplutons auf grund von Isotopenaltern / Th. Kaemmel. - Theoretische Aspekte zur radiogeochronologischen Datierung von Gesteinen und Mineralen / G. Christoph. - Die Verteilung der Strontium-90 und Cäsium-137 im Wasserkörper der Ostsee 1975-1982 / D. Weiß, E. Ettenhub
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  • 79
    Series available for loan
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-84/26
    In: CRREL Report, 84-26
    Description / Table of Contents: Observations of shore ice pile-up and ride-up along the Alaska Beaufort Sea coast in 1983 and 1984 are presented. New information on historical accounts of onshore ice movement, uncovered since publication of Part I in this series, is reported. An account is given of ice overtopping a concrete caisson exploration island in the Canadian Beaufort Sea.
    Type of Medium: Series available for loan
    Pages: iii, 33 Seiten , Illustrationen
    Series Statement: CRREL Report 84-26
    Language: English
    Note: CONTENTS Abstract Preface Introduction Observations Discussion Literature cited Appendix A: Site location maps
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  • 80
    Call number: ZSP-980-70
    In: 2nd Working Meeting "Radioisotope Application and Radiation Processing in Industry", Part 2, 50 to 97
    In: ZfI-Mitteilungen, Nr. 70
    Type of Medium: Series available for loan
    Pages: 355 Seiten , Illustrationen
    ISSN: 0323-8776
    Series Statement: ZfI-Mitteilungen 70
    Language: English
    Note: Contents of Part 2 Hecht, K. Gerber, R. Otto: Studies on the drying of paints by means of 14C-labelled compounds K. Wagner, F. Brutschin, I. Ritter, T. Gritsch, H. Zimmermann, H. Borchert: Investigations by the aid of radioisotope methods on the technology of the production of carbon and silicon carbide materials K. Gloe, P. Mühl: Determination of metal extraction process parameters using tracer technique W. Migdał, W. Łada, K. Malec-Czechowska: Studies on liquid-liquid extraction of noble metals using radiotracers L. Petryka, K. Przewłocki: Radiotracer investigations of benefication copper ore in the industrial flotation process Z. Bazaniak, J. Palige: Determination of Cu recovery degree from slags in shaft process by means of radiotracers R. Burek, J .K. Zurawicz: On the optimization of concentration measurements in heterogeneous materials based on β-backscatter measurements B. Heinrich: Analysis of carbon content in crude brown coal by inelastic scattering of neutrons and the method of time correlated associated particles P. Urbańaki, D. Wagner, M. Jankowska, E. Kowalska: Determination of calcium and iron and measurements of ash content in the brown coal H.-W. Thümmel: Some considerations relating to the prediction of the efficiency of radiometric methods for the continuous ash content determination of coal L. Wawrzonek: Monitor of ash content of coal with X-ray source I. Pavlicsek, V. Stenger, A. Veres: Apparatus for gamma activation analysis I. Végvári, I. Juhász: Determination of PbO content of lead-glass samples on the ground of gamma-absorption E. Schöntube, H.-J. Große: Aerosol ionization gas analysis as a monitoring for waste halothane in the atmosphere of operating theatre S. Mothes, P. Popp, G. Oppermann, W.-D. Herberg: Measurement of fluorocarbons with the ECD P. Popp, E. Schöntube, G. Oppermann: The usability of radiation ionization detectors for the determination of N2O concentrations in the air of operating theatres P. Popp, G. Arnold, G. Oppermann: A hydrocarbon-sensitized argon ionization detector for the detection of inorganic compounds R. Szepke, W. Lisieski, J. Harasimczuk: Automatic dust monitor AMIZ G. Vormum: Sealed sources - problems of design, measurement and quality control L. Gąsiorowski: New trends in developments of ratioisotope gauges in Poland G. Brunner: Direct chemical information from special radio tracers as well as from outer X-ray excitation J. Hirling: Experience and future trend in industrial application of nuclear methods in Hungary I. N. Ivanov, O. K. Nikolaenko, Yu. V. Phecktistov, V. L. Chulkin: Use of short-lived nuclides in activation analysis Kl.-P. Rudolph, J. Flachowsky, A. Lange: Trace element determination in semiconducter selenium by neutron activation analysis (NAA) W. Lisieski, J. Mirowicz: Some industrial applications of instruments with neutron sources R. Dybczyński, H. Maleszewaka, S. Sterliński, Z. Szopa, M. Wasek: Some problems in neutron activation determination of gold and silver in ores and concentrates of copper industry L. Jankowski: Cost-benefit aspects of radioisotope application in industry B. Manouchev, T. Boschkova, L. Tsankov, V. Gurev, I. Kojucharov, G. Grozev: On the possibilities of the direct gamma-spectremetry in natural waters P. Morgenstern, D. Müller, W. Riedel: A parallel grid proportional scintillation counter for the X-ray region from 3 to 20 keV with regard to high count rates N. A. Anders, V. S. Isaev, V. I. Filatov, B. E. Kolesnikov, D. Müller, P. Morgenstern, W. Riedel, V. P. Varvaritsa: X-ray fluroescence analyzer of light elements with proportional scintillation counter D. Müller, P. Morgenstern, W. Riedel, W. Warwariza, B. E. Kolesnikow, N. A. Anders, W. J. Filatov: General considerations concerning the use of the X-ray analyzer "RALE" in industry
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  • 81
    Call number: ZSP-980-69
    In: 2nd Working Meeting "Radioisotope Application and Radiation Processing in Industry", Part 1, 1 to 48
    In: ZfI-Mitteilungen, Nr. 69
    Type of Medium: Series available for loan
    Pages: 480 Seiten , Illustrationen
    ISSN: 0323-8776
    Series Statement: ZfI-Mitteilungen 69
    Language: English
    Note: Contents of Part 1 S. Niese: Reactor neutron activation analysis of industrial materials R.P. Gardner, K. Verghese: Use of Monte Carlo methods in the calibration and design optimization of radiation gauges and analyzers R. Otto, P. Hecht: On labelling with generator nuclides M. Richter: Measurement of residence time distribution with radiotracers using periodic pseudo-random binary signal sequences J. Schoen: A computer code for tracer experiment data analysis H.-H. Deicke, J. Flachowsky, K.-P. Rudolph, N. Beiermann: Transit time measurements in technical plants by using a multichannel analyzer H. Bohne: Measurements of air currents L. Baranyai: Tracer study of simultaneous homogenization and segregation in industrial equipments N. Balabanov, N. Kapitanova: Application of radiotracer method for study of glass furnaces J. Thẏn: Evaluation of mixing particulate solids by radiotracer method H.-G. Koennecke, P. Kulicke, E. Antal, J. Jentzsch, H. Michael: Investigation of the mixing efficiency of kneading machines using radionuclides A.G. Belov, V.E. Zhuchko, Yu.S. Zamyatnin, Yu.G. Teterev, D. Rubio: Development of the nuclear-physical methods of analysis at the laboratory of nuclear reactions of the JINR R. Burek, K. Wojcik: A new concept for measuring of free moisture in solid materials N. Bachvarov, I. Georgiev, E. Manolov, P. Pavlov, H. Shukov, K. Tropolov: Process control system for fresh concrete preparation H. Baumbach: Investigation of moisture migration in the concrete of a special test construction under simulated load conditions A. Petrov, A. Sreno, H. Hristov, P. Penev, G. Georgiev: Beta-ray backscatter instruments for coating thickness measurements in electronic and electrotechnical industry W. Stuchlik, H. Kupsch: Radioactive level indicator for bulk materials in containers with calculation of the residual volume H. Baumbach, K. Fichtler, R. Melzer, D. Tietze, H. Ullrich: The determination of density variation in radiation protective walls of concrete by means of Bremsstrahlung of 1o MeV from linear accelerator D. Avramov: Modernized versions of mobile NDT laboratories V. Friedrich: Examples for radioisotope application in environment protection St. Szpilowski: Prediction of mixing length for transport of effluent in rivers A. Owczarczyk: The localization of the leakages through the dams and bottoms of large water reservoires W. Listwan: Progress in leak detection methods for underground pipelines and tanks J. Starẏ, A. Zeman, B. Havlik: Radionuclides in the investigation of the cumulation of toxic elements on alga and fish W. Richter, D. Kahl, H.-J. Grosse, F. Gleisberg: The use of an AIG-analyzer for the investigation of SO2-dispersion problems R. Goeldner, H.-J. Grosse, F. Gleisberg: Possibilities of the development of improved smoke detectors J. Adler, H.-R. Doering, H.-J. Grosse, F. Gleisberg: The use of the AIG in microelectronics P. Popp, R. Fahnert, S. Mothes, G. Oppermann: Methods for the determination of toxic compounds at work places H.-R. Doering. H.-J. Grosse: The detection of halocarbons by means of the aerosol ionization gas analyzer (AIG) E, Jaworska, I. Kaluska, G. Strzelczak: Crosslinking and free radical decay reactions in irradiated polyethylene in presence of additives J. Zahalka: Radiation modified materials in machine engineering W. Bobeth, R. Hanke, A. Heger, J. Morgenstern, H. Paessler: Technological aspects of planar structurizing on woven and knitted fabrics by localized radiation induced grafting B. Ihme, E. Maeder, A. Mally: Problems in the development of high-energy radiation processing of woven and knitted fabrics S. Nikolov. P, Panayotov, V. Diakova, M. Nikolova: Radiation modification of timber in people's republic of Bulgaria H. Dahlhelm. G. Matejko. G. Huebner: Experiments on sprouting inhibition in onions J. Thẏn: Process analysis with nuclear technique A. Merz: Axial dispersion and homogenization in chemical engineering systems A. Zeuner, F. Hartmann: Investigation of material transport in rotating dryers by aid of Lanthanum-140 D. Manr: Tracer research for modelling of Ion-exchange equipment
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  • 82
    Series available for loan
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-83/4
    In: CRREL Report, 83-4
    Description / Table of Contents: Measurements and analysis of seasonal ice growth and decay on Post Pond, New Hampshire, for the period 1973-1982 are presented. Observations included ice thickness measurements, examination of the various ice types contributing to the ice cover, and measurements of meteorological parameters for correlation with and modeling of the ice growth process. The overall nature of ice growth and decay (ice loss) on the Post Pond has been ascertained, the seasonal variability in the timing of freeze-up and ice-out and the duration of the ice cover have been determined, and the relationship of ice growth to freezing-degree-day (deg C) records evaluated on the basis of a Stefan conduction equation modified to deal with ice sheets covered with or free of snow. Ice growth occurs predominantly by the direct freezing of lake water, but snow ice may compose as much as 50% of the ice cover in winters with higher than average snowfall. Freeze-up leading to the establishment of a stable ice cover occurs during the 4-week period from the end of November to the end of December. Maximum seasonal ice thicknesses were from 45 to 67 cm and are generally attained during the first two weeks of March; ice-out, marking the final disappearance of ice from Post Pond, usually occurs by the third week of April. The overall rate of the ice loss is three to four times that of ice growth, and is dominated initially by melting from the top. As much as 50% of the ice may be lost in this way before the onset of any bottom melting. Final dissipation of the ice cover is usually expedited by candling resulting from preferential melting and disintegration of the ice at crystal boundaries.
    Type of Medium: Series available for loan
    Pages: iv, 30 Seiten , Illustrationen
    Series Statement: CRREL Report 83-4
    Language: English
    Note: CONTENTS Abstract Preface Introduction Location of study Study methods Ice thickness Ice-cover composition Surface air temperatures Freeze-up and ice-out characteristics Results and discussion Ice-growth record Freezing-degree-day records Ice-growth predictions Summary and conclusions Literature cited Appendix A: Ice-growth records Appendix B: Measured and computed ice-growth curves
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  • 83
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/38
    In: CRREL Report, 82-38
    Description / Table of Contents: Extreme cold causes heavy buildup of frost, ice and condensation on many windows. It also increases the incentive for improving the airtightness of windows against heat loss. Our study shows that tightening specifications for Alaskan windows to permit only 30% of the air leakage allowed by current American airtightness standards is economically attractive. We also recommend triple glazing in much of Alaska to avoid window icing in homes and barracks. We base our conclusions on a two-year field study of Alaskan military bases that included recording humidity and temperature data, observing moisture accumulation on windows and measuring airtightness with a fan pressurization device.
    Type of Medium: Series available for loan
    Pages: v, 26 Seiten , Illustrationen
    Series Statement: CRREL Report 82-38
    Language: English
    Note: Contents Abstract Preface Nomenclature Introduction Previous work in cold weather window performance Investigation Data acquisition and analysis Modeling the window thermal regime Moisture and ice observations Airtightness testing and analysis Annual heat loss from air leakage Results and conclusions Moisture on windows Airtightness Airtightness economics Recommendations for windows in extreme cold Airtightness Multiple glazing Literature cited Appendix A: Moisture levels and airtightness Appendix B: Dewpoint data Appendix C: Sample observations of icing
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  • 84
    Call number: ZSP-201-82/37
    In: CRREL Report, 82-37
    Description / Table of Contents: This report presents a Landsat-derived land cover map of the northwest portion of the Arctic National Wildlife Refuge, Alaska. The report is divided into two parts. The first is devoted to the land cover map with detailed descriptions of the mapping methods and legend. The second part is a description of the study area. The classification system used for the maps is an improvement over existing methods of describing tundra vegetation. It is a comprehensive method of nomenclature that consistently applies the same criteria for all vegetation units. It is applicable for large- and small-scale mapping and is suitable for describing vegetation complexes, which are common in the patterned-ground terrain of the Alaskan Arctic. The system is applicable to Landsat-derived land cover classifications. The description of the study area focuses on five primary terrain types: flat thaw-lake plains, hilly coastal plains, foothills, mountainous terrain, and river flood plains. Topography, landforms, soils and vegetation are described for each terrain type. The report also contains area summaries for the Landsat-derived map categories. The area summaries are generated for the five terrain types and for the 89 townships within the study areas. Two land cover maps at 1:250,000 are included.
    Type of Medium: Series available for loan
    Pages: 68 Seiten , Illustrationen, 2 Karten
    Series Statement: CRREL Report 82-37
    Language: English
    Note: CONTENTS Abstract Preface Foreword Introduction A land cover map of the ANWR study area Legend development Mapping method Results Discussion Description of the ANWR study area General description Description of specific terrain types Conclusions Literature cited Appendix A: Descriptions of Landsat land cover categories for ANWR Appendix B: Area summaries Appendix C: Aproximate equivalent units in several systems of land cover, wetland and vegetation classifications used in northern Alaska Appendix D: Soil taxonomy Appendix E: Summary of principal Landsat land cover categories within the terrain types of the ANWR study area
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  • 85
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/36
    In: CRREL Report, 82-36
    Description / Table of Contents: Camp construction and drilling activities in 1950 at the East Oumalik drill site in northern Alaska caused extensive degradation of ice-rich, perennially frozen silt and irreversible modification of the upland terrain. In a study of the long-term degradational effects at this site, the near-surface geology was defined by drilling and coring 76 holes (maximum depth of 34 m) in disturbed and undisturbed areas and by laboratory analyses of these cores. Terrain disturbances, including bulldozed roads and excavations, camp structures and off-road vehicle trails, were found to have severely disrupted the site's thermal regime. This led to a thickening of the active layer, melting of the ground ice, thaw subsidence and thaw consolidation of the sediments. Slumps, sediment gravity flows and collapse of materials on slopes bounding thaw depressions expanded the degradation laterally, with thermal and hydraulic erosion removing materials as the depressions widened and deepened with time. Degradational processes became less active after thawed sediments thickened sufficiently to slow the increase in the depth of thaw and permit slope stabilization. The site's terrain is now irregular and hummocky with numerous depressions. Seasonal thaw depths are deeper in disturbed areas than in undisturbed areas and reflect the new moisture conditions and morphology. The severity of disturbance is much greater at East Oumalik than at another old drill site, Fish Creek. The difference results primarily from differences in the physical properties of the sediments, including the quantity and distribution of ground ice.
    Type of Medium: Series available for loan
    Pages: 42 Seiten , Illustrationen
    Series Statement: CRREL Report 82-36
    Language: English
    Note: CONTENTS Abstract Preface Summary Introduction Methodology Geologic setting Camp construction and occupation Types of disturbance Degradational processes and the effective area of impact Areal effects of disturbance Topography Groundwater, surface water and drainage Sediment properties and near-surface stratigraphy Surficial processes Depth of thaw Comparison to Fish Creek Discussion and conclusions Literature cited
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  • 86
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/14
    In: CRREL Report, 82-14
    Description / Table of Contents: A comparative study was made of design criteria and analytical methods for footings and pile foundations on perma­frost employed in U.S.S.R. Design Code SNiP II-18-76 (1977) and U.S. Army Cold Regions Research and Engineering Laboratory Special Report 80-34 developed in the early 1970's by the U.S. Army Corps of Engineers and published in 1980. The absence of adequate constitutive equations for frozen soils and of rigorous solutions of the boundary prob­lems has made it necessary to incorporate (explicitly or implicitly) various safety factors in the foundation analyses. From the review it is concluded that the principal difference between these practices is in the assessment and application of appropriate values of safety factors, which leads to a substantial discrepancy in the dimensions and cost of footings and pile foundations in permafrost.
    Type of Medium: Series available for loan
    Pages: iv, 20 Seiten , Illustrationen
    Series Statement: CRREL Report 82-14
    Language: English
    Note: CONTENTS Abstract Preface Introduction U.S.S.R. system of standards U.S.S.R. Design Code SNiP 11-18-76 (1977) subsoils and foundations on permafrost General regulations Classification of soils Basic regulations for foundation design Analysis of subsoils and foundations Design of foundations for special soil conditions, and appendices SR 80-34 (1980) design and construction of foundations in areas of deep seasonal frost and permafrost General information Foundation design Conclusions Literature cited
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  • 87
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/12
    In: CRREL Report, 82-12
    Description / Table of Contents: From a high-quality set of velocity, temperature, and humidity profiles collected upwind and downwind of a step change in surface roughness, temperature, and moisture, we have calculated upwind and downwind values of the heat fluxes and friction velocity. The surface change is from smooth to rough; upwind, the sensible heat flux is upward and the latent heat flux is zero; downwind, the surface is well-watered so that the latent heat flux is upward while the sensible heat flux is downward. The downwind latent heat flux in this fetch-limited flow obeys NL=0.08 Rx 0.76 where NL is the latent heat Nusselt number and Rx is the fetch Reynolds number, a parameter for characterizing fetch-limited flows. Because this relation is virtually the same as one found to describe the sensible heat and condensate fluxes over arctic leads, we conclude that the Nusselt numbers nondimensionalizing scalar fluxes are the same for a given fetch Reynolds number when boundary conditions are similar.
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    Pages: vii, 18 Seiten , Illustrationen
    Series Statement: CRREL Report 82-12
    Language: English
    Note: CONTENTS Abstract Preface List of symbols Introduction Upwind: flux gradient method Downwind: integral method ResulIts Energy budget Latent heat flux Surface stress Downwind humidity profiles Discussion Conclusions Literature cited
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  • 88
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/10
    In: CRREL Report, 82-10
    Description / Table of Contents: Dielectric measurements have been performed on silt and sand samples from permafrost areas using Time Domain Reflectometry. The sample temperatures were varied from +25 °C to -25 °C, and volumetric water content was varied between oven-dry and 0.55 gH2O/cm3. The data were processed for frequencies between 0.1 and 5.0 GHz. The results show a constant K' and a low K' for frequencies up to 1 GHz. A frequency dependence seen on the data above 2 GHz is probably the result of unfrozen, adsorbed water. At moisture levels near saturation at all temperatures, these soils have excellent propagation characteristics for ground-probing radar operating below 0.3 GHz. Massive ice should be easily detectable in permafrost within a few degrees of 0 °C.
    Type of Medium: Series available for loan
    Pages: 7 Seiten , Illustrationen
    Series Statement: CRREL Report 82-10
    Language: English
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  • 89
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/7
    In: CRREL Report, 82-7
    In: Charged dislocation in ice, II.
    Description / Table of Contents: The contribution of electrically charged dislocation motion to dielectric relaxation was studied theoretically. Experimentally obtained data on charge density, dislocation density, and segment length and distribution described in Part I of this series were used to calculate dielectric relaxation spectra. The results indicate that the charged dislocation process can produce the observed audio frequency dielectric relaxation as well as the distribution of spectra.
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    Pages: iii, 15 Seiten , Illustrationen
    Series Statement: CRREL Report 82-7
    Language: English
    Note: CONTENTS Abstract Preface Introduction Theoretical development of dielectric relaxation due to charged dislocations Numerical calculations for distributed segment length Discussion Conclusions Literature cited Appendix A. Mosotti type catastrophe by charged dislocation processes
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  • 90
    Call number: AWI G6-19-92758
    In: 2nd Working Meeting "Radioisotope Application and Radiation Processing in Industry", Abstracts of papers
    Type of Medium: Monograph available for loan
    Pages: 167 Seiten
    Language: English
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  • 91
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/18
    In: CRREL Report, 82-18
    Description / Table of Contents: Snow and ice control on highways has come to rely heavily on the use of sodium chloride to maintain a trafficable surface for unimpeded movement. Empirical approaches have led to a wide range of application rates, some clearly excessive, but justified on the ground of safety and expediency. The combination of environmental degradation from the huge quantities of salt entering the environment, along with the increased cost of salt itself and the cost of its application have spurred the search for more precise knowledge of the proper amount of salt to apply to a pavement, considering a range of environmental, traffic and chemical parameters. Since controlled tests in the field are extremely difficult to make, a circular test track of three test pavements, dense-graded asphaltic concrete (DGA), open-graded asphaltic concrete (DGA) and portland cement concrete (PCC), was constructed in a coldroom. Natural snow and ice were applied to the pavements and an instrumented slipping wheel was driven over the surfaces to generate frictional forces. These forces were measured and then used to evaluate the response to salt application with time for three test temperatures. OGA had the lowest friction values at a temperature near the freezing point, but higher initial values or more rapidly increasing values than DGA and PCC following salt application at the two lower temperatures. Optimum application rate of salt on PCC and DGA lies between 100 and 300 lb/lane mile (LM), and a higher rate resulted in slight or no improvement in friction. DGA showed anomalous results: lower friction for 300 Ib/LM and higher friction for both 100 and 500 Ib/LM.
    Type of Medium: Series available for loan
    Pages: vi, 55 Seiten , Illustrationen
    Series Statement: CRREL Report 82-18
    Language: English
    Note: CONTENTS Abstract Preface Introduction Objectives Background Approach Influencing factors Field factors Laboratory Laboratory trafficking tests Force measurement and coefficient of friction Test tire slip Surface friction gauge Test procedure British portable tester Experimental results Conclusions Recommendations Literature cited Appendix A. Test pavements Appendix B. Pennsylvania State University field study Appendix C. Rochester Institute of Technology field study
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  • 92
    Call number: ZSP-201-82/15
    In: CRREL Report, 82-15
    Description / Table of Contents: An experiment is described that demonstrates the balance between the ice and the unfrozen water in a frozen soil as water is removed. Nuclear magnetic resonance (NMR) is used to monitor the unfrozen water content as the soil is dehydrated by a molecular sieve material. Our results show that the unfrozen water content of a Morin clay soil remains constant until the total water content has been reduced to the point where no ice remains in the system. Once the ice is depleted, the unfrozen water content determined by NMR corresponds to the total water content of the soil determined by the weight of water removed by the molecular sieve material. Thus the validity of utilizing NMR in determining unfrozen water contents vs temperature is established.
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    Pages: 8 Seiten , Illustrationen
    Series Statement: CRREL Report 82-15
    Language: English
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  • 93
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/13
    In: CRREL Report, 82-13
    Description / Table of Contents: Frost heave is analyzed for the common case in which some ice penetrates the soil. In this situation, heave is due to the accumulation of soil-free ice just within the frozen zone, behind a frozen fringe of finite thickness. Heat and mass transport within and across that fringe are crucial processes in the dynamics of heave. This analysis concentrates on activity within the fringe, also connecting that activity to heat and mass flows in the more frozen and unfrozen zones. Each component in a set of governing differential equations is developed from rational physics and thermodynamics, using previous experimental work. It is assumed that the soil ice grows through interconnected interstices; hence it constitutes and can move as a rigid body. When the assumption is translated into mathematical terms, it completes the governing equations. The model resulting from these considerations is a one-dimensional finite element computer program that solves the equations for arbitrary initial and boundary conditions. The model is used to simulate the heave history of a hypothetical soil column frozen unidirectionally and subjected to a surcharge. The results are gratifying in that they predict qualitatively the characteristics of numerous laboratory observations. Some questions about the completeness of the theory remain, and strict verification of the model awaits further experimentation and better parameter identification.
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    Pages: iii, 11 Seiten , Illustrationen
    Series Statement: CRREL Report 82-13
    Language: English
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  • 94
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-116
    In: Research report / Cold Regions Research and Engineering Laboratory, 116
    Description / Table of Contents: Abstract: Specimens of snow from the South Pole were tested to investigate air permeability K (cm/sec), ultimate compressive strength σc (g/cm^2 ) and dynamic Young's modulus E (g/cm^2 ) as a function of density. Anisotropy in a single layer of snow (snow between two summer crusts) was found in all three properties. Comparison with data for snow from Site II, Greenland, showed an empirical relation for both areas: σc = 10.42 x 10^-4 E for 0.43 g/cm^3 〈 ρ 〈 0.51 g/cm^3. σc = 5.68 x 10^-4 E for 8.63 x 10^3 g/cm^2 for 0.51 g/cm^3 〈 ρ 〈 0.90 g/cm^3. Air permeabilities are different for the two sites because of time and meteorological effects.
    Type of Medium: Series available for loan
    Pages: iv, 22 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 116
    Language: English
    Note: CONTENTS Preface Summary Introduction Preparing the snow specimens Air permeability Experimental procedure Results and discussion Viscoelastic properties Principle Experimental method Results and discussion Creep tests Unconfined compressive strength Experimental procedure Results and discussion General discussion Literature cited Appendix A: Test result
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  • 95
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-81/13
    In: CRREL Report, 81-13
    Description / Table of Contents: Electrical properties of frozen ground were measured using radio frequency interferometry (RFI) in the very high frequency (VHF) radiowave band. Ice-rich organic silts and sands and gravels of variable ice content were investigated during early April of both 1979 and 1980. Frequencies between 10 and 150 MHz were used with best results obtained between 40 and 100 MHz. Surface impedance and magnetic induction techniques were also used to obtain an independent measure of low frequency resistivity and to obtain a separate control on vertical inhomogeneity. Soil samples were tested for organic and water content. The dielectric constants determined for the ice-rich organic silts ranged from 4.0 to 5.5 while those for the sands and gravels were about 5.1. Dielectric loss was due to d.c. conduction and was very low for the silts but significant for the sands and gravels. The higher values for the sands and gravels were most likely due to the higher concentrations of salt that are reported to exist in the old beach ridges in this region. All the RFI measurements are believed to be indicative of only the first few meters of the ground although the radiowaves could penetrate to tens of meters.
    Type of Medium: Series available for loan
    Pages: iv, 18 Seiten , Illustrationen
    Series Statement: CRREL Report 81-13
    Language: English
    Note: CONTENTS Abstract Preface Introduction Background Objectives and procedures Theory and instrumentation Radio frequency interferometry Case 1: Homogeneous ground model Case 2: Two-layer ground model RFI instrumentation Low frequency methods Point Barrow sites Results and discussion Site 1: Tundra Site 2: Beach ridge Site 3: Marsh Conclusions Literature cited Appendix A: Discussion of low-frequency geophysical methods
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  • 96
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-81/12
    In: CRREL Report, 81-12
    Description / Table of Contents: Revegetation techniques along the trans-Alaska pipeline as employed by Alyeska Pipeline Service Company during the 1975-1978 summers were observed. Objectives included determining the success of treatments, identifying problem areas, and noticing long-term implications. Observations and photographs at 60 sites located along the trans-Alaska pipeline indicated frequent occurrence of successful revegetation as well as frequent problems, such as erosion, slope instability, poor scheduling of seed application, occurrence of weed species, failure to optimally reuse topsoil and fine-grained soil, and low rates of native species reinvation. Alyeska's visual impact engineering was observed to be very successful, as shown by high first-season survival. However, a related program for establishing willow cuttings was unsuccessful in 1977 but appeared very promising in 1978 largely due to improved management and more favorable growing conditions. Terrain disturbances due to the construction of the fuel gas line, snowpads, and oil spills were examined to identify and describe related environmental impacts on natural vegetation. Proper construction and use of snowpads minimized the extent and severity of disturbance. Crude oil spills, although damaging to vegetation did not cause total kill of vegetation, and certain types of spills may have only short-term effects. Results of restoration research by CRREL along the trans-Alaska pipeline are discussed.
    Type of Medium: Series available for loan
    Pages: 115 Seiten , Illustrationen
    Series Statement: CRREL Report 81-12
    Language: English
    Note: CONTENTS Abstract Preface Summary Introduction Revegetation procedures 1975-1978 construction seasons Willow cutting program Visual impact engineering program Selected terrain disturbances Fuel gas line and snowpads Island Lake and oil line snowpads Oil spills and revegetation CRREL restoration sites Conclusions Recommendations Literature cited Appendix A: List of sites observed during 1975 Appendix B: Annotated photographs of permanent revegetation observation sites-1975-1978 Appendix C: Photographic record of fuel gas line observation sites
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  • 97
    Call number: ZSP-201-81/1
    In: CRREL Report, 81-01
    Description / Table of Contents: Abstract: The formation of ice jams and their meteorological indicators were studied in detail for the winters of 1975-76, 1976-77 and 1977-78 on the Ottauquechee River at and east of Woodstock, Vermont. Meteorological data are presented for nearby National Weather Service Co-Operative Stations as well as for CRREL sites on the Ottauquechee River. The severity of each winter is discussed, as are the effects of a heavy rainfall on a high water equivalent snow cover. The resultant runoff and subsequent ice jamming that occurs is discussed. Continuous monitoring of water temperature before, during and immediately after an ice cover formed on the river during the winter of 1977-78 is included. The report includes a section on warm sewer outfall effects on the ice at and below a municipal treatment plant. Retrieved data will assist in future modeling studies to help predict ice formation, growth, decay and jamming of river ice covers.
    Type of Medium: Series available for loan
    Pages: iv, 26 Seiten , Illustrationen
    Series Statement: CRREL Report 81-01
    Language: English
    Note: CONTENTS Abstract Preface Introduction Meteorological data retrieval and measurements Meteorological effects on river ice cover Winter 1975-76 Winter 1976-77 Winter 1977-78 Analysis of ice formation and decay Mechanism of ice formation Ice growth and decay on the Ottauquechee River, 1975-76, 1976-77, 1977-78 Influence of warm sewage effluent on river water temperatures and ice conditions Conclusions Literature cited Appendix A: Climatological observations Appendix B: Ice conditions, field remarks and pertinent photography
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  • 98
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-81/3
    In: CRREL Report, 81- 3
    Description / Table of Contents: Abstract: A 1:24 scale hydraulic model study of water intake under frazil ice conditions is presented. The intake, located 9 m below the surface of the St. Lawrence River in Massena, New York,has a through flow of 0.14 m^3/s. The model study, conducted in the refrigerated flume facility of the U.S. Army Cold Regions Research and Engineering Laboratory, investigated methods of minimizing the frazil ice blockage on the intake. Two protective structures were modeled and the relative benefits of each are presented. The additional cross-sectional area provided by the protective structures lowered the vertical velocity component of the intake water to 0.0027 m/s. At this velocity the buoyant force acting on the frazil ice particle is larger than the downward drag force, causing the particle to rise. The results demonstrate that under certain low flow conditions a protective structure can minimize frazil ice blockage problems.
    Type of Medium: Series available for loan
    Pages: 11 Seiten , Illustrationen
    Series Statement: CRREL Report 81-03
    Language: English
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  • 99
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-81/2
    In: CRREL Report, 81-2
    Description / Table of Contents: Abstract: Many hyperbolic reflections have been observed on marine seismic records obtained during oil exploration in the Beaufort Sea, and on USGS seismic sub-bottom profiles from the Prudhoe Bay vicinity. A hyperbolic projection system was designed to rapidly measure seismic velocities from the curves on the records. The velocities observed were approximately the velocity of sound in water. The hyperbolic signals also showed dispersion properties similar to acoustic normal modes in shallow water. These observations indicate that the signals responsible for the hyperbolic reflections propagate as normal modes within the water layer, with very limited penetration of the seabed. Determinations of the dominant frequency of these signals indicate that the penetration into the seabed has a characteristic attenuation depth (skin depth) of about 1.5 m for the sub-bottom profiles and 12 m for the marine records. It therefore appears that some hyperbolic reflections may be generated by variations in materials that occur near the seabed. There is some evidence of linearity of the anomalies, possibly related to sediment-filled or open ice gouges, or other changes in material properties at shallow depths.
    Type of Medium: Series available for loan
    Pages: iv, 16 Seiten , Illustrationen
    Series Statement: CRREL Report 81-2
    Language: English
    Note: CONTENTS Abstract Preface Introduction Methods of analysis Marine seismic records Seismic sub-bottom profiles Results and discussion Distribution of hyperbolic reflections Hyperbolas on oil exploration records Hyperbolas on sub-bottom profiles Conclusions Literature cited Appendix A: Hyperbola projector
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  • 100
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-81/17
    In: CRREL Report, 81-17
    Description / Table of Contents: Environmental conditions are described for the continental shelf of the western Arctic, and for the shelf of Labrador and Newfoundland. Special emphasis is given to the gouging of bottom sediments by ice pressure ridges and icebergs, and an approach to systematic risk analysis is outlined. Protection os subsea pipelines and cables by trenching and direct embedment is discussed, touching on burial depth, degree of protection, and environmental impact. Conventional land techniques can be adapted for trenching across the beach and through the shallows, but in deeper water special equipment is required. The devices discussed include hydraulic dredges, submarine dredges, plows, rippers, water jets, disc saws and wheel ditchers, ladder trenchers and chain saws, routers and slot millers, ladder dredges, vibratory and percussive machines, and blasting systems. Consideration is given to the relative merits of working with seabed vehicles, or alternatively with direct surface support from vessels or from the sea ice
    Type of Medium: Series available for loan
    Pages: 38 Seiten , Illustrationen
    Series Statement: CRREL Report 81-17
    Language: English
    Note: CONTENTS Abstract Preface Introduction The western Arctic of North America The continental shelf of Newfoundland and Labrador Burial depth for pipes and cables Degree of protection offered by burial Environmental impact Trenching the beach and the shallows in the western Arctic Trenching beyond the shallows Suction, or hydraulic, dredging Bottom-t raveling cutterhead dredges Plows Rippers Water jets Subsea disc saws and wheel ditchers Subsea ladder trenchers and chain saws Subsea routers and slot millers Bucket ladder trenchers Vibratory and percussive devices Hard rock excavation under water Control and monitoring of subsea machines Vessels and vehicles Trenching from the sea ice Costs of subsea trenching Reference Appendix: Description of waters off Alaska and Newfoundland
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