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  • Bücher  (339)
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  • 1
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Berlin : Nationalkomitee für Geodäsie und Geophysik bei der Akademie der Wissenschaften der DDR
    Dazugehörige Bände
    Signatur: MOP Per 581 ; MOP Per 581(1/11) ; ZSP-319/A-11
    In: Geodätische und geophysikalische Veröffentlichungen : Reihe 1, Heft 11
    Materialart: Schriftenreihen ausleihbar
    Seiten: 63 Seiten , Illustrationen
    ISSN: 0533-7577
    Serie: Geodätische und geophysikalische Veröffentlichungen : Reihe 1 11
    Sprache: Deutsch
    Anmerkung: Inhalt: I. Untersuchungen zur Avifauna von King George / R. Bannasch und U. Lundberg. - II. Robbenbeobachtungen im Gebiet von King George / R. Bannasch. - III. Beobachtungen der marinen Fauna im Litoral und Benthal von King George (Südshetlandinseln, Antarktis) / M. Rauschert. - IV. Untersuchungen zum Helminthenbefall und zur Nahrung verschiedener Tiergruppen / K. Feiler. - , Zusammenfassung in englischer, deutsche und russischer Sprache , Teilweise in kyrillischer Schrift
    Standort: MOP - Bitte bestellen
    Standort: MOP - Bitte bestellen
    Standort: AWI Archiv
    Zweigbibliothek: GFZ Bibliothek
    Zweigbibliothek: GFZ Bibliothek
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Signatur: AWI G6-94-0019
    Materialart: Monographie ausleihbar
    Seiten: 207 S. , graph. Darst., Kt. , 24 cm
    ISBN: 92-0-141083-2
    Serie: IAEA Panel Proceedings Series
    Anmerkung: Contents: SECTION 1. ISOTOPIC COMPOSITION OF NATURAL WATERS AND CLIMATE. - Precipitation, groundwater and surface waters: control of climate parameters on their isotopic composition and their utilization as palaeoclimatological tools / J. R. Gat. - Relationships between climatic changes and variations in isotopic composition of groundwater, precipitation and organic soil matter in the Quaternary period / V. I. Ferronsky, L. S. Vlasova, A. D. Esikov, V. A. Polyakov, Yu. B. Seletsky, Ya.-M.K. Punning, R.A. Vajkmyaeh. - Dependence of δ18O and δD in precipitation on climate / U. Siegenthaler, H.A. Matter. - Stable isotopic composition of precipitation and climatic variability / C. M. van der Straaten, W. G. Mook. - Deuterium and 18O in precipitation: a global model from oceans to ice caps (Extended synopsis) / L. Merlivat, J. Jouzel. - 18O/16O ratio of water in a local ecosystem as a basis of climate record / H. Forstel, H. Hiitzen. - SECTION 2. ISOTOPIC COMPOSITION OF ORGANIC SUBSTANCES. - 18O/16O ratios in leaf water and cellulose of aquatic and terrestrial plants / A. Ferhi, T. Bariac, R. Letolle. - Stable isotope studies on organic material (Extended synopsis) / P. Trimborn, W. Stickler, H. Moser. - Oxygen isotopic composition of mammal bones as a possible tool for palaeoclimatic studies: first results / A. Longinelli, A. Peretti Padalino. - SECTION 3. ISOTOPIC COMPOSITION OF SEDIMENTS. - Isotopic composition of palaeowaters as inferred from speleothem and its fluid inclusions / H. Schwarcz, C. Yonge. - Isotope and other physico-chemical parameters of palaeolake carbonates: tools for climatic reconstruction / E. Lemeille, R. Letolle, F. Meliere, P. Olive. - 18O/16O ratios of the pore water of Baltic Sea sediments / H. Förstel. - Palaeoclimatic studies using freshwater deposits and fossil groundwater in central and northern Canada / P. Fritz. - SECTION 4. ISOTOPIC COMPOSITION OF PALAEOGROUNDWATERS. - Stable isotopic evidence for palaeo-recharge conditions of groundwater / A. H. Bath. - Isotopic composition of groundwater in the southern Sahara / M. Dray, R. Gonfiantini, G.M. Zuppi. - Stable isotope studies on palaeowaters (Extended synopsis) / H. Moser, W. Stickler, P. Trimborn. - List of Participants and Designating Member States and Organizations.
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Signatur: AWI G9-89-0476
    In: International Union of Geological Sciences : Series B, Number 4
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Monographie ausleihbar
    Seiten: 1172 Seiten , Illustrationen , 29 cm
    Ausgabe: First printing
    ISBN: 0299084108 , 0-299-08410-8
    Serie: International Union of Geological Sciences : Series B Number 4
    Sprache: Englisch
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Monographie ausleihbar
    Monographie ausleihbar
    Stuttgart : Enke
    Signatur: AWI G6-95-0057
    Beschreibung / Inhaltsverzeichnis: Das Buch ermöglicht die Durchführung der Schwermineralanalyse von der Probennahme über die Aufbereitung bis zur Bestimmung im Durchlichtmikroskop und die Auswertung ohne weitere Literaturhilfsmittel. Es gibt Beispiele und Anregungen für die Interpretation. Das Buch kann sowohl als Grundlage für die Einarbeitung in die Schwermineralanalyse verwendet werden als auch besonders für den geübten Schwermineralanalytiker als Nachschlagewerk von Mineraldaten und Bestimmungsmerkmalen dienen.
    Materialart: Monographie ausleihbar
    Seiten: VIII, 158 S. : Ill., graph. Darst.
    ISBN: 3432929315
    Anmerkung: Inhalt: 1 Einleitung. - 2 Arbeitsmethoden und Interpretation. - 2.1 Probennahme. - 2.1.1 Gesteinsart. - 2.1.2 Zahl und Menge der Proben. - 2.2 Vorbereitung der Proben im Labor. - 2.3 Mineraltrennung. - 2.3.1 Schweretrennung. - 2.3.1.1 Trennflüssigkeiten. - 2.3.1.2 Sedimentation durch Schwerkraft. - 2.3.1.2.1 Aufbau der Geräte. - 2.3.1.2.2 Abtrennvorgang. - 2.3.1.3 Zentrifugentrennung. - 2.3.1.4 Vergleich von Zentrifugen- und Schwerkrafttrennung. - 2.3.2 Magnetische Abtrennung. - 2.3.2.1 Allgemeines. - 2.3.2.2 Trennungsgang. - 2.3.3 Weitere Methoden der Mineraltrennung. - 2.4 Methoden der Schwermineralbestimmung. - 2.4.1 Durchlichtmikroskopie. - 2.4.1.1 Präparate für das Durchlichtmikroskop. - 2.4.1.1.1 Vorgang. - 2.4.1.1.2 Die Wahl des Einbettungsmittels. - 2.4.1.1.3 Menge der Schwerminerale. - 2.4.1.2 Optische Bestimmung. - 2.4.1.2.1 Lichtbrechung. - 2.4.1.2.2 Doppelbrechung. - 2.4.1.2.3 Auslöschung. - 2.4.1.2.4 Elongation. - 2.4.1.2.5 Anomale Interferenzfarben. - 2.4.1.2.6 Konoskopische Bestimmung. - 2.4.1.2.7 Bestimmung des optischen Charakters. - 2.4.2 Röntgenographische Bestimmung. - 2.4.3 Auflicht-Bestimmung. - 2.5 Quantitative Bestimmung und Darstellung eines Schwermineralspektrums. - 2.5.1 Art der Auszählung eines Schwermineralpräparates. - 2.5.2 Quantitative Angaben. - 2.5.3 Darstellungsmethoden. - 2.6 Auswertung der Schwermineralanalyse. - 2.6.1 Mineralauflösung. - 2.6.2 Mineralneubildung. - 2.6.3 Transporteinflüsse. - 2.6.3.1 Abnutzung. - 2.6.3.2 Sortierung. - 2.6.4 Lagerstätten. - 2.6.5 Paläogeographie und Stratigraphie. - 3 Beschreibung der Schwerminerale. - 4 Literatur. - 5 Anhang: Tabellen, Tafeln. - 6 Register.
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Signatur: 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〉
    Materialart: Monographie ausleihbar
    Seiten: 259 S. , Ill.
    ISBN: 9172604980
    Sprache: Englisch
    Anmerkung: 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.
    Standort: AWI Lesesaal
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Monographie ausleihbar
    Monographie ausleihbar
    New York : Wiley
    Signatur: AWI A6-92-0306 ; MOP 46247 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: XVII, 477 Seiten , Illustrationen
    Ausgabe: second editon
    ISBN: 0471059714
    Sprache: Englisch
    Anmerkung: 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.
    Standort: AWI Lesesaal
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: AWI Bibliothek
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Signatur: ZSP-168-2
    In: Berichte zur Polarforschung
    Materialart: Schriftenreihen ausleihbar
    Seiten: 29 S. : Kt. + 1 Beil.
    Serie: Berichte zur Polarforschung 2
    Sprache: Deutsch
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Monographie ausleihbar
    Monographie ausleihbar
    Leningrad : Gidrometeoizdat
    Signatur: AWI E3-84-0607
    Beschreibung / Inhaltsverzeichnis: В настоящем сборнике освещен широкий круг вопросов, связанных с изучением ледникового покрова и Южного океана, колебаний уровня оледенения Антарктиды, глубинного строения рифтовых зон, атмосферных процессов, геомагнитных пульсаций в полярной шапке, сейсмичности Антарктики, биологии Южного океана, материально-технического обеспечения экспедиции, международного сотрудничества на шестом континенте, адаптации человека в Южнои полярной области, а также с созданием взлетно-посадочных полос на ледниковой поверхности. Сборник рассчитан на специалистов-полярников, занимающихся изучением Антарктики, и ученых, исследующих природные процессы в глобальном масштабе.
    Beschreibung / Inhaltsverzeichnis: This collection covers a wide range of issues related to the study of the ice sheet and the Southern Ocean, fluctuations in the glaciation level of Antarctica, the deep structure of rift zones, atmospheric processes, geomagnetic pulsations in the polar cap, seismicity of the Antarctic, biology of the Southern Ocean, logistics of the expedition, international cooperation on the sixth continent, human adaptation in the South polar region, as well as the creation of runways on the glacial surface. The collection is intended for polar explorers who study Antarctica and scientists who study natural processes on a global scale.
    Materialart: Monographie ausleihbar
    Seiten: 175 Seiten , Illustrationen , 22 cm
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Signatur: AWI G3-99-0351
    Materialart: Monographie ausleihbar
    Seiten: XIV, 489 Seiten , Illustrationen
    ISBN: 0-12-355860-3
    Serie: Burg Wartenstein symposium 81
    Sprache: Englisch
    Anmerkung: 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.
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Monographie ausleihbar
    Monographie ausleihbar
    München : List
    Signatur: AWI P6-84-0850
    Beschreibung / Inhaltsverzeichnis: Einer der letzten weißen Flecken auf dem Globus, die riesige Land- und Eismasse um den Südpol, der sechste Kontinent, bekommt allmählich Farbe. ln der Antarktis könnte unsere Zukunft liegen: Dort gibt es ungenutzte Rohstofflager, deren Bedeutung bisher nur geschätzt werden kann, ein biologisches Reservoir im Eismeer, das eine der Nahrungsmittelquellen der Zukunft sein könnte (man denke nur an den Krill), und schließlich die schier unerschöpflichen Süßwasservorräte, die in der polaren Eiskappe gespeichert sind und einmal helfen könnten, die uns immer mehr bedrohenden Dürrekatastrophen aufzuhalten. Von unschätzbarem Wert sind aber auch die Erkenntnisse auf den Gebieten der Biologie, der Geologie und Meteorologie, die sich durch die besonderen klimatischen Gegebenheiten der Antarktis ergeben und aus denen sich für die heutigen und künftigen Lebensbedingungen auf der Erde entscheidende Schlüsse ziehen lassen. Seit dem zweiten Weltkrieg wird die Antarktis systematisch von jenen Nationen erkundet, die sich im Antarktisvertrag gegenseitig die friedliche Erforschung dieses Kontinents zugesichert haben. Seit 1979 hat die Bundesrepublik Deutschland durch mehrere Expeditionen und die Errichtung der ganzjährig besetzten Georg-von- Neumayer-Forschungsstation die Voraussetzungen für die Aufnahme in den Antarktisclub geschaffen. Weitere Marksteine für die neuen deutschen Aktivitäten sind die Eröffnung des Alfred-Wegener-lnstituts für Polarforschung in Bremerhaven und die Taufe des ersten deutschen voll eismeertauglichen Forschungsschiffes "Polarstern". Dieses Buch zeigt in den Bildern von Klaus v. Mandelsloh, der an der German Antarctic North Victorialand Expedition (GANOVEX) im antarktischen Sommer 1979/80 teilgenommen hat, den landschaftlichen Formenreichtum und die Lebensbedingungen im ewigen Eis, an die sich Pflanzen und Tiere auf beinahe unfaßliche Art anzupassen wissen. Der Text von Jörn Freyenhagen beschäftigt sich mit der Geschichte und Gegenwart internationaler, vor allem aber deutscher Antarktisforschung. Er gibt Auskunft über die Planungen und Ergebnisse der aktuellen Expeditionen, er zeigt die Ziele und Risiken der Forschungen, die Chancen und Gefahren einer multinationalen Erschließung der natürlichen Reserven dieser bisher fast unberührten Landschaft.
    Materialart: Monographie ausleihbar
    Seiten: 167 S. , 107 Ill. (z.T. farb.) u. Kt. , 32 cm
    ISBN: 3471781595
    Anmerkung: Inhalt: Vorwort. - Die großen Entdecker der Antarktis. - Die ersten Landexpeditionen zum Südpool. - Wettrennen zum Südpol: Das Drama Amundsen-Scott. - Die deutschen Antarktis-Expeditionen. - Der Beginn des technischen Zeitalters am Südpol. - Die Entstehung von Antarktika seit Gondwanaland. - Die Wüste aus Eis und Wasser. - Das Antarktis-Programm der Bundesrepublik Deutschland. - Standorterkundung, Aufbau und Leben in der Station. - Das Polarforschungs- und Versorgungsschiff "Polarstern". - Das Alfred-Wegener-Institut für Polarforschung. - Mit der "Ganovex"-Expedition im Nord-Victoria-Land. - Der Untergang der "Gotland II". - Die Pflanzen- und Tierwelt der Antarktis. - Biomass - die größte Volkszählung aller Zeiten. - Die allgemeinen geologischen Grundlagen der Rohstoffsuche. - Eisberge im Schlepptau. - Die Meteoriten-Schatzkammer im ewigen Eis. - Umweltschutz - Die Überlebensformel für den sechsten Kontinent. - Anhang: Wortlaut des Antarktis-Vertrages. - Die Antarktis in Zahlen - Daten - Fakten. - Literaturverzeichnis. - Register.
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  • 11
    Monographie ausleihbar
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    Leningrad : Gidrometeoizdat
    Signatur: AWI G7-85-0784 ; AWI S5-19-74859
    Beschreibung / Inhaltsverzeichnis: This is the first attempt at compiling a comprehensive glossary of glaciology and related Earth sciences. The wordstock of this edition amounts to 2200 terms covering all types of snow and natural ice: snowcover, avalanches, sea, river, and lake ice, ground ice and aufice, as well as such phenomena as glacial mudflows. The entries contain definitions of terms with explicit references to related processes and phenomena. The glossary is provided with many figures and sample reference material. The glossary is considered for specialists in glaciology, hydrology, meteorology, climatology, geography, geophysics, and geology. It may serve as a textbook for university students ans as a manual for the highschool teachers.
    Materialart: Monographie ausleihbar
    Seiten: 526 Seiten , Illustrationen , 24 cm
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
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  • 12
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
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    In: Berichte zur Polarforschung
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    Seiten: 59 S. : Ill., graph. Darst., Kt.
    Serie: Berichte zur Polarforschung 3
    Sprache: Deutsch
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  • 13
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    Moskva : Akad.
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    In: Rezul'taty issledovanij po meždunarodnym geofizičeskim proektam
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    Serie: Rezul'taty issledovanij po meždunarodnym geofizičeskim proektam
    Sprache: Russisch
    Anmerkung: Contents: Preface. - Introduction. - Chapter 1 Some of the physiographical peculiarities of the Kuznetsky Alatau and the morphology of recent glaciation of the ridge. - Chapter 2 Structure of glaciers of the Kuznetsky Alatau : Density of firn on névés and glaciers. - Chapter 3 Conditions for glacier existence in the Kuznetsky Alatau : oroclimatic basis for glaciation. - Chapter 4 Regime of glaciers of the Kuznetsky Alatau. - Conclusion. - Abstract. - Bibliography. , In kyrill. Schr. - Zsfassung in engl. Sprache.
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    In: Middle atmosphere program
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    In: Middle atmosphere program
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  • 16
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    In: Middle atmosphere program
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    In: Middle atmosphere program
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  • 18
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
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    In: Berichte zur Polarforschung
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    Serie: Berichte zur Polarforschung 1
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  • 19
    Signatur: AWI P2-88-0760-3
    In: Antarctica and international law, Volume 3
    Materialart: Monographie ausleihbar
    Seiten: XI, 551 Seiten
    ISBN: 0379203325
    Sprache: Englisch
    Anmerkung: 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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  • 20
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    In: Meddelelser om Grønland
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    ISBN: 8717051118
    ISSN: 0106-1046
    Serie: Meddelelser om Grønland : Geoscience 10
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  • 21
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    ISBN: 8717029697
    Serie: Meddelelser om Grønland : Geoscience 8
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  • 22
    facet.materialart.
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    Canberra ; 132.1984-147.2002
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  • 23
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  • 25
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    In: Middle atmosphere program
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    In: Middle atmosphere program
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  • 27
    Signatur: ZSP-558-14 ; MOP 46209 / Mitte
    In: Middle atmosphere program
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  • 28
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    In: Middle atmosphere program
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  • 29
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    In: Middle atmosphere program
    Materialart: Schriftenreihen ausleihbar
    Seiten: 146 S.
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  • 30
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    Copenhagen : Nyt Nordisk Forl.
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    In: Meddelelser om Grønland
    Materialart: Monographie ausleihbar
    Seiten: 36 S. : Ill.
    ISBN: 8717029635
    ISSN: 0106-1054
    Serie: Meddelelser om Grønland : Bioscience 9
    Sprache: Englisch
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  • 31
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    Copenhagen : Kommissionen for Videnskabelige Undersøgelser i Grønland
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    In: Meddelelser om Grønland
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    Seiten: 72 S. : Ill., zahlr. graph. Darst.
    ISBN: 8717052297
    Serie: Meddelelser om Grønland : Bioscience 15
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  • 32
    Signatur: ZSP-553-5
    In: Meddelelser om Grønland
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    Seiten: 19 S.
    ISBN: 8717028736
    ISSN: 0106-1046
    Serie: Meddelelser om Grønland : Geoscience 5
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  • 33
    Signatur: ZSP-553-11
    In: Meddelelser om Grønland
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    Seiten: 24 S.
    ISBN: 8717051193
    ISSN: 0106-1046
    Serie: Meddelelser om Grønland : Geoscience 11
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    In: Middle atmosphere program
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  • 35
    Signatur: ZSP-558-10 ; MOP 46209 / Mitte
    In: Middle atmosphere program
    Materialart: Schriftenreihen ausleihbar
    Seiten: 220 S. : Ill., graph. Darst.
    Sprache: Englisch
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  • 36
    Schriftenreihen ausleihbar
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    Leipzig : Acad. of Sciences of the GDR, Central Inst. for Isotope and Radiation Research
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    Signatur: MOP 46290 / Mitte ; ZSP-980-51 ; ZSP-980-51(2. Ex.)
    In: ZfI-Mitteilungen ; 51, Nr. 51
    Materialart: Schriftenreihen ausleihbar
    Seiten: 140 S. , Ill., graph. Darst., Kt.
    ISSN: 0323-8776
    Serie: ZfI-Mitteilungen 51
    Anmerkung: Contents: Foreword. - Isotopes in Antarctic Research / K. Fröhlich, H. Schütze. - Deuterium variations in maritime atmospheric moisture / P. Kowski, G. Strauch, H. Schütze. - On the influence of degradation processes on the isotopic composition of Antarctic precipitations / R. Der. - Extractive method for obtaining gas inclusions from ice / G. Strauch, P. Kowski. - Global monitoring of atmospheric CO2: activities planned by the GDR in Antarctica / P. Harting, U. Wand. - Deuterium and 18O variations in lakes of the Schirmacher Oasis (East Antarctica) / W. Richter, G. Strauch. - Environmental studies in Antarctica on the basis of tritium and radiocarbon measurements / D. Herbert, K. Fröhlich. - Isotope variations of hydrogen, carbon and nitrogen in florae from the Schirmacher Oasis, East Antarctica / G. Strauch, D. Haendel, I. Maaß, K. Mühle, A. Runge. - The ecology and chemistry of some Antarctic lichens / W. Richter, S. Huneck. - Another seal find in the Schirmacher Oasis (Queen Maud Land, Antarctica) / A. Hiller, W. Richter, R. Trettin. - Survey on hitherto published numbers of ZfI-Mitteilungen.
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  • 37
    Signatur: AWI A4-85-0427
    Beschreibung / Inhaltsverzeichnis: Приводятся основные результаты докладов на совещании-семинаре "Изучение Арктики, Антарктики и Мирового океана - на службу людям", проводившемся в Москве, на ВДНХ 9 - 13 февраля 1981 г. = The main results of the reports at the workshop-seminar "The study of the Arctic, Antarctic and the World Ocean - for people", held in Moscow, at the Exhibition of Economic Achievements, February 9 - 13, 1981.
    Materialart: Monographie ausleihbar
    Seiten: 182 S. : Ill., graph. Darst.
    Sprache: Russisch
    Anmerkung: Soderžanie: Predislovie. - Osnovnye rezul'taty 25-letnego issledovanija Antarktiki / N. A. Kornilov. - Poljarnaja klimatologija na službe narodnogo chozjajstva / A. I. Voskresenskij, G. U. Karimova, L. S. Petrov. - Sostojanie i perspektivy okeanologičeskogo obespečenija narodnogo chozjajstva v Arktike / N. V. Mustafin, E. N. Dvorkin. - Sostojanie i perspektivy gidrochimičeskich issledovanij dlja obsluživanija naučnych i chozjajstvennych učreždenij Arktiki / V. P. Rusanov. - Obespečenie ledovoj informaciej ledokol'no-transportnych sudov v Arktike / V. E. Borodačev, A. V. Bušuev, A. A. Kirillov. - Izučenie prirodnych uslovij dlja obespečenija tranzitnogo plavanija po Severnomu Morskomu Puti / A. Ja. Buzuev, V. B. Fedjakov. - Ispol'zovanie novych metodov v monitoringe termičeskogo režima Arktiki / I. B. Eserkepova, K. M. Lugina, N. A. Speranskaja, R. L. Kagan, I. P. Smirnova, V. V. Subbotin. - Izučenie vysokich sloev atmosfery v Arktike, Antarktike, i nad Mirovym okeanom s pomošč'ju meteoraket / G. A. Kokin, K. E. Speranskij, S. S. Gajgerov. - Optičeskie svojstva atmosfery nad Atlantičeskim okeanom / E. E. Artemkin, S. I. Avdjušin, A. E. Mikirov. - Voprosy soveršenstvovanija sinoptičeskogo obespečenija sudochodstva i rybopromyslovych rabot v Južnom okeane / L. Ju. Ryžakov. - Radiolokacionnye issledovanija oblakov v različnych rajonach Mirovogo okeana / A. I. Korotov, A. E. Mjagkov, A. B. Ščupjackij. - Osnovnye itogi i perspektivy naučnych issledovanij Severozemel'skogo gljaciologičeskogo stacionara AANII "Kupol Vavilova" / L. S. Govorucha. - Nekotorye rezul'taty issledovanij po programme Meždunarodnogo antarktičeskogo gljaciologičeskogo proekta (MAGP) / V. G. Aver'janov. - Prilivnye javlenija vo l'dach Severnogo Ledovitogo okeana (po kosmičeskim dannym) / V. V. Bogorodskij, M. G. Nazirov. - Nekotorye čerty prostranstvennoj struktury ledjanogo pokrova arktičeskich morej v svjazi s turbulentnym treniem i geostrofičeskim zachvatom prilivnoj volny / M. G. Nazirov, V. G. Trofimova. - Primenenie model'nych naturnych ėksperimentov pri izučenii vzaimodejstvija nefteproduktov s okeanom i atmosferoj / V. V. Izmajlov, V. S. Račkov. - Neftjanye uglevodorody v vodach mirovogo okeana i metody bor'by s nimi / M. P. Nestepova, I. A. Nemirovskaja, O. S. Močalova. - Osnovnye rezul'taty issledovanij vozmožnych izmenenij gidrometeorologičeskich uslovij severnych morej pod vlijaniem vodochozjajstvennych meroprijatij / V. A. Potanin, A. A. Dement'ev. - Issledovanie struktury gidrofizičeskich polej v central'noj časti Arktičeskogo bassejna / L. I. Zubkov, A. V. Gusev, P. V. Bogorodskij. - Ispol'zovanie infrakrasnych (IK) aėrokosmičeskich nabljudenij Arktičeskich morej v navigacii i pri rešenii drugich narodnochozjajstvennych zadač / A. I. Paramonov, V. A. Čebotareva. - Set' avtomatičeskich magnitografov po proektu "Geografičeskij poligon v Antarktide" dlja izučenija okolozemnogo kosmičeskogo prostranstva / A. N. Zajcev, G. A. Timofeev, V. O. Papitašvili. - Prognozirovanie chodkosti sudov vo l'dach / V. I. Kašteljan, D. D. Maksutov, O. V. Faddeev. , In kyrill. Schr.
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  • 38
    Monographie ausleihbar
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    Moskva : Izd. Moskovskogo Univ.
    Signatur: AWI A12-89-0014
    Materialart: Monographie ausleihbar
    Seiten: 214 S. : lll., graph. Darst.
    Sprache: Russisch
    Anmerkung: In kyrill. Schr.
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  • 39
    Signatur: AWI A4-89-0036-3 ; MOP 45231/C / Mitte
    In: Spravočnik po klimatu Antarktidy / pod red. I. M. Dolgina, Tom 3
    Materialart: Monographie ausleihbar
    Seiten: 270 Seiten , Illustrationen
    Serie: Spravočnik po klimatu Antarktidy / pod red. I. M. Dolgina 3
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
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  • 40
    Signatur: AWI A4-90-0142
    In: Trudy sovetskoj antarktičeskoj ėkspedicii, 74
    Materialart: Monographie ausleihbar
    Seiten: 151 S.
    Serie: Trudy sovetskoj antarktičeskoj ėkspedicii 74
    Sprache: Russisch
    Anmerkung: Contents: Preface. - PART 1. GENERAL DESCRIPTION. - Chapter 1. Organization and implimentation of observations. - Chapter 2. Engineering activity on the SAE. - Appendix. - PART 2. SCIENTIFIC RESULTS. - On the initial data set for the long-range H500 hydrodynamic forecast for the Southern Hemisphere / M. P. Yevseyev. - To the forecast of weather elements in Antarctica / R. G. Panchugin. - Method of spectral zoning on the 4-dimensional analysis of upper-air data on the Southern Hemisphere / S. A. Petrusenko. - On the structure of air mass transport on the Southern Hemisphere atmosphere / E. P. Lysakov. - Aerial-synoptic analysis of the conditions leading to strong katabatic winds, observed on Molodezhnaya station on 1976 / S. T. Sokolov, N. N. Shirokov. - Some results of the study of the atmospheric nourishment of Antarctic Sea ice sheets / A. I. Voskresensky , N. N. Bryazgin. - The assessment of the advective and dynamic processes on the formation of the thermal regime of Antarctic atmosphere / E. P. Lysakov. - The study of physical / acoustical and rheological properties of the ice sheet on the vicinity of the Novolazarevskaya Station / V. A. Nikitin, V. K. Stepanov. - On the temperature field of the Novolazarevskaya Ice Shelf / L. I. Yeskin. - The primary production on the lakes of Schirmacher Oasis / E. B. Kaup. - On the computer processing of the Antarctic geomagnetic data / A. F. Maloletkin. - Hydrometeorological and sea ice conditions at the Bellingshausen Station, 1975/76 / A. A. Lebedev. - Biochemical changes on the blood serum under cold impact / P. Ye. Vloshchinsky, Yu. A. Sidorov. - The study of the elasticity of the vegetative system on the wintering-over personnel in Antarctica / Yu. A. Sidorov. , In kyrill. Schr. - Engl. Inhaltsverzeichnis S. 5-6
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  • 41
    Monographie ausleihbar
    Monographie ausleihbar
    Leningrad : Gidrometeoizdat
    Signatur: AWI G7-85-1035
    Materialart: Monographie ausleihbar
    Seiten: 65 S.
    Sprache: Russisch
    Standort: AWI Lesesaal
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  • 42
    Monographie ausleihbar
    Monographie ausleihbar
    Ottawa : Geological Survey of Canada
    Dazugehörige Bände
    Signatur: SR 90.0007(317) ; AWI G6-06-0042
    In: Bulletin
    Materialart: Monographie ausleihbar
    Seiten: 49 S. + 4 pl.
    ISBN: 066010637X
    Serie: Bulletin / Geological Survey of Canada 317
    Sprache: Englisch
    Standort: AWI Lesesaal
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  • 43
    Monographie ausleihbar
    Monographie ausleihbar
    Dordrecht [u.a.] : Kluwer
    Signatur: M 99.0101 ; AWI G7-86-0694
    Beschreibung / Inhaltsverzeichnis: This book is designed as a comprehensive mathematical introduction to the science of the behaviour of glaciers and ice sheets in their geophysical environment. Its main objective is to provide a better fundamental understanding of the problems of ice mechanics and fluid mechanics of large ice masses, and to connect and unify some of the approaches that have been developed in different disciplines concerned with glaciers and ice sheets. The first two chapters provide the physical background by treating ice within the framework of continuum physics and material science. The central part of the book deals with the conceptualization and mathematical formulation of glacier and ice sheet flow. Considerations concerning fluid mechanics and thermodynamics are given equal attention. The aim is to deduce common glaciological formulae from first principles and to state clearly the assumptions which lie behind the approximations. This allows the extension of the results - known to glaciologists in plane flow only - to three dimensions, thus paving the way for further research.
    Materialart: Monographie ausleihbar
    Seiten: xxxvii, 510 S.
    ISBN: 9027714738
    Serie: Mathematical approaches to geophysics
    Klassifikation:
    Meteorologie und Klimatologie
    Sprache: Englisch
    Anmerkung: TABLE OF CONTENTS: ACKNOWLEDGEMENTS. - PREFACE. - INTRODUCTION. - SYMBOLS AND NOTATION. - PART I. FUNDAMENTAL PHYSICS AND MATERIALS TECHNOLOGY OF ICE. - 1.General Concepts. - 1. Introduction. - 2. Equations of Balance. - 3. Material Response. - (a) General constitutive relations, simple materials. - (b) The rule of material objectivity. - (c) Material symmetry. - (d) Constitutive response for isotropie bodies. - (e) Materials with bounded memory-some constitutive representations. - (f) Incompressibility. - (g) Some representations of isotropic functions. - 4. The Entropy Principle. - (a) The viscous heat-conducting compressible fluid. - (b) The viscous heat-conducting incompressible fluid. - (c) Pressure and extra stress as independent variables. - (d) Thermoelastic solid. - (e) Final remarks. - 5. Phase Changes. - (a) Phase changes for a viscous compressible heat-conducting fluid. - (b) Phase changes for a viscous incompressible heat-conducting fluid. - References. - 2. A Brief Summary of Constitutive Relations for Ice. - 1. Preliminary Remarks. - 2. The Mechanical Properties of Hexagonal Ice. - (a) The crystal structure of ordinary ice. - (b) The elastic behavior of hexagonal ice. - (c) The inelastic behavior of single-crystal ice. - 3. The Mechanical Properties of Polycrystalline Ice. - (a) The elastic behavior of polycrystalline ice. - (b) Linear viscoelastic properties of polycrystalline ice. - (α) General theory. - (β) Experimental results. - (c) Non-linear viscous deformation and creep. - (α) Results of creep tests. - (β) Generalization to a three-dimensional flow law. - (γ) Other flow laws. - 4. The Mechanical Properties of Sea Ice. - (a) The phase diagram of standard sea ice and its brine conten. - (b) Elastic properties. - (c) Other material properties. - References. - PART II. THE DEFORMATION OF AN ICE MASS UNDER ITS OWN WEIGHT. - 3. A Mathematical Ice-flow Model and its Application to Parallel-sided Ice Slabs. - 1. Motivation and Physical Description. - 2. The Basic Model - Its Field Equations and Boundary Conditions. - (a) The field equations. - (α) Cold ice region. - (β) Temperate ice region. - (b) Boundary conditions. - (α) At the free surface. - (β) Along the ice-water interface. - (γ) Along the bedrock surface. - (δ) Along the melting surface. - 3. The Response of a Parallel-sided Ice Slab to Steady Conditions. - (a) Dimensionless forms of the field equations. - (b) Parallel-sided ice slab, a first approximation to glacier and ice-shelf flow dynamics. - (α) Velocity and temperature fields x-independent. - (β) Extending and compressing flow. - (γ) Floating ice shelves 4. Concluding Remark. - References. - 4. Thermo-mechanical Response of Nearly Parallel-sided Ice Slabs Sliding over their Bed. - 1. Motivation. - 2. The Basic Boundary-value Problem and its Reduction to Linear Form. - 3. The Solution of the Boundary-value Problems. - (a) Zeroth-order problem. - (b) First-order problem. - (α) Harmonic perturbation from uniform flow for a zero accumulation rate. - (β) Analytic solution for a Newtonian fluid. - (γ) Numerical solution for non-linear rheology. - (δ) Effect of a steady accumulation rate. - (ε) A historical note on a previous approach. - (η) The first-order temperature problem. - (c) Numerical results for steady state. - (α) Transfer of bottom protuberances to the surface. - (β) Basal stresses. - (γ) Surface velocities. - (δ) Effect of a steady accumulation rate. - 4. Remarks on Response to a Time-dependent Accumulation Rate. - 5. Surface-wave Stability Analysis. - (a) The eigenvalue problem. - (b) Discussion of results. - 6. Final Remarks. - References. - 5. The Application of the Shallow-ice Approximation. - 1. Background and Previous Work. - 2. Derivation of the Basal Shear-stress Formula by Integrating the Momentum Equations over Ice Thickness. - (a) Derivation. - (b) The use of the basal shear-stress formula in applied glaciology. - 3. Solution of the Ice-flow Problem using the Shallow-ice Approximation. - (a) Governing equations. - (b) Shallow-ice approximation. - (c) Construction of the perturbation solution. - (d) Results. - (e) Temperature field. - 4. Theoretical Steady-state Profiles. - (a) Earlier theories and their limitations. - (b) Surface profiles determined by using the shallow-ice approximation. - 5. An Alternative Scaling - a Proper Analysis of Dynamics of Ice Sheets with Ice Divides. - (a) Finite-bed inclination. - (b) Small-bed inclination. - (c) Illustrations. - References. - 6. The Response of a Glacier or an Ice Sheet to Seasonal and Climatic Changes. - 1. Statement of the Problem. - 2. Development of the Kinematic Wave Theory. - (a) Full non-linear theory. - (b) Perturbation expansion-linear theory. - (c) An estimate for the coefficients C and D. - (d) Boundary and initial conditions. - 3. Theoretical Solutions for a Model Glacier. - (a) Solutions neglecting diffusion. - (b) Theoretical solutions for a diffusive model. - (α) Coefficient functions for the special model. - (β) Solution for a step function. - (γ) General solution for uniform accumulation rate. - (δ) The inverse problem - calculation of climate from variations of the snout. - 4. General Treatment for an Arbitrary Valley Glacier. - (a) Fourier analysis in time. - (α) Low-frequency response. - (β) High-frequency response. - (γ) Use of the results. - (b) Direct integration methods. - 5. Derivation of the Surface-wave Equation from First Principles Non-linear Theory. - (a) Surface waves in the shallow-ice approximation. - (α) Integration by the methods of characteristics. - (β) An illustrative example. - (γ) A remark on linearization. - (δ) Effects of diffusion. - (b) Remarks regarding time-dependent surface profiles in ice sheets. - (c) Long waves in an infinite ice slab - Is accounting for diffusion enough?. - (α) Basic equations. - (β) Construction of perturbation solutions. - (γ) Numerical results. - 6. Concluding Remarks. - References. - 7. Three-dimensional and Local Flow Effects in Glaciers and Ice Sheets. - 1. Introduction. - 2. Effect of Valley Sides on the Motion of a Glacier. - (a) Solutions in special cases. - (α) Exact solutions for the limiting cases. - (β) Solution for a slightly off-circular channel. - (γ) A note on very deep and wide channels. - (b) A useful result for symmetrical channels with no boundary slip. - (c) Numerical solution - discussion of results. - 3. Three-dimensional Flow Effects in Ice Sheets. - (a) Basic equations. - (b) Decoupling of the stress-velocity problem from the problem of surface profile. - (c) The equation describing the surface geometry. - (d) The margin conditions. - 4. Variational Principles. - (a) Fundamental variational theorem. - (b) Variational principle for velocities. - (c) Reciprocal variational theorem. - (d) Maximum and minimum principles. - (e) Adoption of the variational principles to ice problems. - 5. Discussion of Some Finite-element Solutions. - References. - Appendix: Detailed Calculations Pertaining to Higher-order Stresses in the Shallow-ice Approximation. - AUTHOR INDEX. - SUBJECT INDEX.
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  • 44
    Signatur: SR 99.0015(371) ; ZSP-292-371
    In: Freiberger Forschungshefte, 371
    Materialart: Schriftenreihen ausleihbar
    Seiten: 117 Seiten , Illustrationen
    Ausgabe: 1. Auflage
    ISSN: 0071-9404
    Serie: Freiberger Forschungshefte : C 371 : Geowissenschaften - Geologie
    Sprache: Deutsch
    Anmerkung: Enthält 3 Beiträge , Inhaltsverzeichnis: Annotation Tektonische Untersuchungen in den Herbert Mountains (Shackleton Range, Antarktika) / Joachim Hofmann Beitrag zur Geologie des Pensacola-Gebirges (Antarktika) / Wolfgang Weber Tektonische Untersuchungen in der Patuxent-Formation der Schmidt Hills (Pensacola Mts. (Antarktika)) / Joachim Hofmann und V. V. Samsonov
    Standort: Kompaktmagazin unten
    Standort: AWI Archiv
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  • 45
    Monographie Präsenzbestand
    Monographie Präsenzbestand
    Jena : Gustav Fischer Verl.
    Dazugehörige Bände
    Signatur: AWI PY-83-1271-10,5
    In: Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898-1899, Bd. 10, H. 5
    Materialart: Monographie Präsenzbestand
    Seiten: S. 211-337 , Taf.
    Sprache: Deutsch
    Standort: AWI Archiv
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  • 46
    Monographie ausleihbar
    Monographie ausleihbar
    Leningrad : Gidrometeoizdat
    Signatur: AWI A3-17-90425
    Beschreibung / Inhaltsverzeichnis: The book by A. S. Monin "Introduction to the theory of climate" summarizes the principal notions, information and methods of the physical theory of climate in its contemporary sense which implies that the basis of this theory is formed by a physico-mathematical modelling of the climatic system the atmosphere-ocean-land. The book is meant for specialists dealing with investigations of atmosphere, cryosphere, biosphere and land hydrology.
    Materialart: Monographie ausleihbar
    Seiten: 245 S.
    Sprache: Russisch
    Anmerkung: In kyrill. Schr.
    Standort: AWI Lesesaal
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  • 47
    Signatur: AWI G6-18-91504
    Materialart: Dissertationen
    Seiten: 118, (38) S. , graph. Darst.
    Sprache: Deutsch
    Anmerkung: Göttingen, Univ., Diss., 1981 , INHALTSVERZEICHNIS: 1. EINLEITUNG. - 2. PROBENHERKUNFT UND STRATIGRAPHIE. - 3. PROBENBESCHREIBUNG. - 4. ANALYSENVERFAHREN. - 4.1. Messung des Gesamt- und organischen Kohlenstoffs der Proben. - 4.1.1. Messung des Gesamtkohlenstoffs. - 4.1.2. Messung des organischen Kohlenstoffs. - 4.1.3. Berechnung des Karbonatkohlenstoffs. - 4.2. Präparation und Messung der Isotope. - 4.2.1. Präparation für die Karbonatisotopenmessung. - 4.2.2. Präparation für die Corg-Isotopenmessung. - 4.2.3. Präparation für die CBit-Isotopenmessung. - 4.2.4. Durchführung der Isotopenmessung. - 4.3. Röntgenographische Methoden. - 4.3.1. Übersichtsaufnahmen. - 4.3.2. Röntgenographische Bestimmung des Calcit/Dolomit-Verhältnisses an Proben mit einem Karbonatanteil 〉 90 %. - 4.4. Chromatographische Methoden. - 4.4.1. Dünnschichtchromatographie. - 4.4.2. Gaschromatographie. - 4.5. Extraktionsverfahren. - 4.5.1. Soxhletextraktion. - 4.5.2. Ultraschallextraktion. - 4.5.3. Gegenüberstellung der beiden Extraktionsverfahren hinsichtlich ihrer Verwendbarkeit für organogeochemische Analysen. - 5. VERTEILUNG DES ORGANISCHEN KOHLENSTOFFS IM PHANEROZOIKUM. - 6. BESCHREIBUNG DER ERGEBNISSE DER ISOTOPENANALYSEN. - 6.1. Kohlenstoff- und Sauerstoffisotope der Karbonatfraktion. - 6.1.1. Kohlenstoffisotope des Karbonatkohlenstoffs. - 6.1.2. Sauerstoffisotope der Karbonatfraktion. - 6.1.2. Proben mit auffallend abweichenden Isotopenwerten. - 6.2. Isotopenmessungen am organischen Kohlenstoff. - 6.2.1. Definitionen. - 6.2.2. Kohlenstoffisotopenmessung am gesamten organischen Material. - 6.2.3. Die Kohlenstoffisotope der Bitumenfraktion. - 7. DISKUSSION DER ISOTOPENWERTE. - 7.1. Diskussion der Isotopenwerte des Karbonatkohlenstoffs. - 7.2. Diskussion der Isotopenwerte des Karbonatsauerstoffs. - 7.3. Diskussion einiger Karbonate mit von marinen Isotopenwerten abweichenden Ergebnissen. - 7.3.1. Proben mit ungewöhnlich niedrigen Kohlenstoff-Isotopenwerten. - 7.3.2. Proben mit sehr schweren δ18O-Werten. - 7.4. Diskussion der δ13C org- und der δ13CBit- Werte. - 7.4.1. Veränderungen der Isotopenzusammensetzung auf dem Wege vom lebenden Organismus zum sedimentären Kerogen und Bitumen und die Bedeutung der Photosynthese. - 7.4.2. Diskussion der Isotopenwerte. - 7.4.2.1. Ergebnisse der Isotopenmessungen am gesamten organischen Kohlenstoff (Corg). - 7.4.2.2. Ergebnisse der Isotopenmessungen der Bitumenfraktion. - 8. ERGEBNISSE UND DISKUSSION DER ORGANOGEOCHEMISCHEN ANALYSEN. - 8.1. Veränderungen in der chemischen Zusammensetzung der Biomasse auf dem Weg zum sedimentären organischen Material. - 8.2. Entstehung, Verteilung und Signifikanz der n-Alkane. - 8.2.1. Die Rolle der Fettsäure als n-Alkan Vorläufer. - 8.2.2. Umwandlung von Fettsäuren in n-Alkane. - 8.2.3. Charakteristische n-Alkan Verteilungsmuster. - 8.2.4. Der CPI-Wert. - 8.2.5.- Die Isoprenoide Pristan und Phytan. - 8.3. Diskussion der gaschromategraphischen Analysen. - 9. ZUSAMMENHÄNGE ZWISCHEN DEN ISOTOPENANALYSEN UND DEN ERGEBNISSEN DER ORGANOGEOCHEMISCHEN ANALYSE. - 10. ZUSAMMENFASSUNG. - 11. LITERATURVERZEICHNIS. - ANHANG.
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  • 48
    Signatur: AWI G6-18-91505
    Materialart: Dissertationen
    Seiten: 146 S. , Ill., graph. Darst.
    Sprache: Englisch
    Anmerkung: Groningen, Univ., Diss., 1983 , CONTENTS: INTRODUCTION. - CHAPTER 1. ANALYTICAL AND PREPARATIVE TECHNIQUES. - 1.1. Introduction. - 1.2. Isotope mass spectrometry of H, O and C. - 1.2.1. 2H analysis of H2. - 1.2.2. 18O and 13C analysis of CO2. - 1.3. Preparation of H2 from H2O and organic compounds. - 1.3.1. Combustion and reduction system. - 1.3.1.1. Automated vacuum taps. - 1.3.1.2. Automated cold trap. - 1.3.1.3. Automated combustion. - 1.3.1,4, Membrane pump. - 1.3.2. Performance and results. - 1.3.2.1. H2O samples. - 1.3.2.1. Organic samples. - 1.4. Preparation of CO2 from H2O and organic compounds. - 1.4.1. Introduction. - 1.4.2. Review of the available methods for extracting oxygen. - 1.4.3. Sealed nickel tube pyrolysis. - 1.4.3.1. Principle. - 1.4.3.2. Realization. - 1.4.3.3. Technical details. - 1.4.3.4. Results and calibration. - 1.4.3.5. 18O analysis of some organic pounds 1.4.3.5. δ2H of hydrogen produced by the SNTP method. - 1.5. Preparation of carbon dioxide for 13C analysis. - 1.6. Separation of cellulose from wood and peat. - 1.6.1. Introduction. - 1.6.2. Separation of cellulose from wood. - 1.6.3. Separation of cellulose from peat. - 1.6.4 Nitration and drying of cellulose. - CHAPTER 2. 18O FRACTIONATION BETWEEN CO2 AND H2O. - 2.1. Introduction. - 2.2. 18O analysis of H2O. - 2.3. Equilibration with CO2. - 2.4. Mass spectrometric analyses. - 2.5. Results anddiscussion. - CHAPTER 3. FACTORS AFFECTING THE 2H/1H AND 18O/16O RATIO OF PLANT CELLULOSE. - 3.1. Survey of factors affecting the 2H/1H and 18O/16O ratio. - 3.2. Isotopic composition of precipitation. - 3.3. Leaf-water isotopic enrichment. - 3.3.1. Theoretical. - 3.3.2. Measurement of leaf-water enrichment. - 3.3.2.1. Trees. - 3.3.2.2. Bog plants. - 3.4. Biochemical fractionation. - CHAPTER 4. 2H, 18O AND 13C VARIATIONS IN TREE RINGS. - 4.1. Introduction. - 4.2. Methods and material. - 4.3. Results and discussion. - 4.3.1. Intra-ring variations. - 4.3.1.1. Late wood. - 4.3.1.2. Differences between early wood and late wood. - 4.3.2. Inter-ring variations. - CHAPTER 5. 2H, 18O AND 13C VARIATIONS IN PEAT. - 5.1. Introduction. - 5.2. δ2H, δ18O and δ13C values of bog plants. - 5.2.1. Material and method. - 5.2.2. δ18O and δ2H. - 5.2.3. δ13C 5.3. Engbertsdijksveen I. - 5.3. Introduction. - 5.3.2. Description of the local vegetational succession. - 5.3.3. Cellulose preparation. - 5.3.4. The δ2H and δ18O record. - 5.4. Engbertsdijksveen VII. - 5.4.1. Introduction. - 5.4.2. Description of the local vegetational succession. - 5.4.3. The δ2H and δ18O record. - 5.4.4. The δ13C record. - 5.5. Comparison between Engbertsdijksveen I and VII. - 5.6. Conclusions. - Appendix. - REFERENCES. - SUMMARY. - SAMENVATTING. - ACKNOWLEDGEMENTS.
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  • 49
    Signatur: ZSP-SCAR-570-4
    In: National Antarctic Research Report to SCAR, No. 4
    Materialart: Schriftenreihen ausleihbar
    Seiten: 24 Seiten
    ISSN: 0179-0072
    Serie: National Antarctic Research Report to SCAR 4
    Sprache: Englisch
    Anmerkung: Contents: Membership of the National Committee on Antarctic Research in the Federal Republic of Germany. - Introduction. - Stations. - I. Record of Activities (past and ongoing), April 81-October 82. - II. Planned Activities, October 82-October 83. - References.
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  • 50
    Monographie ausleihbar
    Monographie ausleihbar
    Sosnowiec : Uniwersytet Śląski, Instytut Geografii
    Signatur: AWI P9-83-1079
    Materialart: Monographie ausleihbar
    Seiten: 248 Seiten , Illustrationen, Karten
    Sprache: Polnisch
    Anmerkung: Contents: A snow cover in the region of Fiord Hornsund on Spitsbergen / J. Pereyma. - Temperature rations in summer on the Waldemar Glacier and on the Waldemar sea lowland / G. Wójcik, K. Marciniak, R. Przybylak. - Precipitation and evaporation in Werenskiold Glacier district / A. Szczepankiewicz-Szmyrka. - Biometeorological conditions on the Werenskiold Glacier forefield in summer of 1980 / A. Szczepankiewicz-Szmyrka. - Some notes on wind directions in the West Spitsbergen in 1980 / K. Gerstmann. - Radar measurements of the thickness of the Werenskiold Glacier / R. Czajkowski - The analysis of movements of the Werenskiold Glacier based on dating of fossil moss / H. Chmal - Increase in the mass of the firn snow in the glacial amphiteatre of the Penck Glacier in the period 1934 to 1958 / C. Lipert - Some automatic systems to collect and transmission stored data using various radio-links / J. Molski. - Würm and Holocene glaciations of North-Western Sörkappland exemplified by the Slakli Valley, Spitsbergen / P. Kłysz, L. Lindner. - The marine origin of Lisbetdalen mezorelief SW Spitsbergen / W. Stankowski - Raised marine terraces of Kulmstranda North-Western Sörkappland / P. Kłysz, L. Lindner - The geomorphological sketch map of the Gåsdalen region, South Spitsbergen / J. Jania, Z. Lentowicz, T. Szczypek, J. Wach. - Last deglaciation of Treskelen Peninsula, Hornsund, Svalbard / L. Marks. - The recession of Vitkovski Glacier as recorded in its marginal zone / L. Andrzejewski, w. Stankowski. - Degradation processes on the end moraine of the Werenskiold Glacier / J. Cegła, J. Kida. - Studies of the dessication crack on the forefield of the Werenskiold Glacier / J. Cegła. - The beginning and evolution of the marginal outwash on the forefield of the Eliza Glacier / A. Olazewski. K. Sendobry. - Summer thawing of the ground in the Kaffiöyra, SW Spitsbergen / K. Marciniak, W. Szczepanik, R. Przybylak - Morphology and sedimentary environments of the Baszkara ·and Dzankuat Glaciers in the High Kaukas / A. Karczewski, A. Kostrzewski,P. W. Kowalew. - Stratigraphic position and remarks on sedimentation of the Brentskardhaugen Bed, Spitsbergen / A. Wierzbowski, G. Biernat, C. Kulicki. - Some remarks concerning the structure of groups of the bottom fauna of the Admiralty Bay - King George Island, South Shetland / P. Presler, K. Jażdżewski·, W. Jurasz, W. Kittel, J. Siciński. - Biological indexes of the hydrological conditions - observations from Hornsund region, Spitsbergen / J. M. Węsławski. - The habitability of the littoraly rocks in region Steinvika and Hyttevika Bays, Vestspitsbergen / O. Różycki, M. Gruszczynski. - Some aspects of the acoustical estimation of the krill abundance / M. Brzozowska. - Liberation of carbon dioxide from tundra soils / H. Dziadowiec. - Exploration in the Hornsundfiord region / J. Szupryczyński. - , In polnischer Sprache
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  • 51
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Leipzig : Akademie der Wissenschaften der DDR, Zentralinstitut für Isotopen- und Strahlenforschung
    Dazugehörige Bände
    Signatur: ZSP-980-46
    In: ZfI-Mitteilungen, Nr. 46
    Materialart: Schriftenreihen ausleihbar
    Seiten: 134 Seiten , Illustrationen
    Serie: ZfI-Mitteilungen 46
    Sprache: Deutsch
    Anmerkung: Inhaltsverzeichnis: Nichtkonstante relative Atommassen als Folge variierender Isotopenhäufigkeiten polynuklider Elemente und ihre Auswirkungen auf die Richtigkeit analytischer Meßwerte bei der Elementanalytik / H. Gerstenberger. - Massenspektrographische Analyse an Standardgesteinsproben / H.-J. Dietze. - Methodische Untersuchungen zur massenspektrographischen Analyse an geologischen Proben mit relativ hohen Seltenerdengehalten / S. Becker, H.-J. Dietze. - Massenspektrographische Analyse von Calciumfluorid-Einkristallen / H.-J. Dietze, H. Zahn. - Gammaaktivierungsanalyse am Mikrotron MT 22 : analytische Möglichkeiten für geologische Proben und Rohsilizium, Bestimmung von Blei / M. Geisler, H. Gerstenberger. - Zur Korrektur von Inhomogenitäten des Reaktorneutronenflusses bei der Aktivierungsanalyse / M. Geisler, H. Schelhorn. - Instrumentelle Aktivierungsanalyse von Molybdäniten / M. Geisler, H. Schelhorn. - Bestimmung von Osmium in Molybdäniten / H. Schelhorn, M. Geisler. - Instrumentelle Aktivierungsanalyse von Flugstaub / M. Geisler. - Aktivierungsanalytische Kontrolle von Spurenelementen bei der Gallium-Diffusion in Silizium / M. Geisler. - Übersicht über bisher erschienene Hefte der ZfI-Mitteilungen.
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  • 52
    Signatur: ZSP-980-80
    In: ZfI-Mitteilungen, Nr. 80
    Materialart: Schriftenreihen ausleihbar
    Seiten: 158 Seiten , Illustrationen
    Ausgabe: als Manuskript gedruckt
    ISSN: 0323-8776
    Serie: ZfI-Mitteilungen 80
    Sprache: Deutsch , Russisch , Englisch
    Anmerkung: 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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  • 53
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/9
    In: CRREL Report, 83-9
    Beschreibung / Inhaltsverzeichnis: Recent observations of shore ice pile-up and ride-up along the coast of the Alaska Beaufort Sea are presented. Information is given to show that sea ice movement on shore has overridden steep coastal bluffs and has thrust inland over 150 m, gouging into and pushing up mounds of beach sand, gravel, boulders and peat and, inland, the tundra material. The resulting ice scar morphology was found to remain for tens of years. Onshore ice movements up to 20 m are relatively common, but those over 100 m are very infrequent. Spring is a dangerous time, when sea ice melts away from the shore, allowing ice to move freely. Under this condition, driving stresses of less than 100 kPa can push thick sea ice onto the land.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 59 Seiten , Illustrationen
    Serie: CRREL Report 83-9
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Introduction Winter 1979-80 observations Winter 1980-81 and summer 1981 observations Winter 1981-82 and summer 1982 observations Old ice ride-up features Discussion Literature cited Appendix A. The boulder rampart and rock littered shore west of Konganevik Pt. Appendix B. Site location maps
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  • 54
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/8
    In: CRREL Report, 83-8
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vii, 53 Seiten , Illustrationen
    Serie: CRREL Report 83-8
    Sprache: Englisch
    Anmerkung: 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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  • 55
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/7
    In: CRREL Report, 83-7
    Beschreibung / Inhaltsverzeichnis: Peak power generation with hydropower creates tailwater flow conditions characterized by high and low flows with abrupt transitions between these states. Flows occurring in tailwaters typically form sharp-fronted, large-amplitude waves of relatively short period. An understanding of the mechanics of downstream propagation of these waves is important both for direct application in studies of the tailwater and because of the similarity of these waves to those following a dam break. An analysis of the dynamic equations of open channel flow is used to quantify the relative importance of flow wave convection, diffusion and dispersion in rivers. The relative importance of each process is re­lated to the relative magnitude of terms in the dynamic equations, providing a physical basis for model formulation. A one-dimensional diffusion wave flow routing model, modified for tailwaters, simulates the important physical pro­cesses affecting the flow and is straightforward to apply. The model is based upon a numerical solution of the kine­matic wave equation. The “modified equation,” Hirt, and von Neumann analyses are used to gain insight into the stability and dissipative and dispersive behavior of the numerical solution, and results of these analyses are compared. A set of linear routings is used to demonstrate the dissipative and dispersive behavior predicted by the analyses and to verify the accuracy of an expression that quantifies the numerical diffusion of the model. The analyses provide a basis for selection of numerical parameters for model applications. The capability and accuracy of the model are enhanced when physical wave diffusion is balanced by numerical diffusion in the model. Maintaining the diffusion balance re­quires that the time derivative weighting parameter 0 be variable and in some instances negative. Though some amount of phase error is introduced, negative 0 values have no adverse effect upon model stability. Field studies were con­ducted to demonstrate the benefits of careful model development and analysis, and to verify the diffusion wave model for rapidly varying tailwater flow. The bed slope and roughness characteristics of the field study reaches (below Apalachia and Norris Dams) differ greatly, spanning those of a large number of rivers of practical interest. The accurate simulation of flow in both of these tailwaters attests to the soundness of both the physical basis of the model and the numerical solution technique. The field studies confirm, for the extreme case of rapidly varying flow in a mildly sloped river, that inertia has a negligible effect upon unsteady flow waves at low Froude numbers. Additionally, these studies verify that diffusion of short-period waves in rivers is generally significant.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 41 Seiten , Illustrationen
    Serie: CRREL Report 83-7
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Physical diffusion and dispersion in open channel flow Modeling approach Description of the diffusion wave flow routing model Analysis of the numerical model Modified equation and Hirt analyses of diffusion wave model von Neumann analysis of the diffusion wave model Linear case studies Accuracy considerations of the numerical solution Field studies Apalachia Dam tailwater Norris Dam tailwater Conclusions Literature cited
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  • 56
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/4
    In: CRREL Report, 83-4
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 30 Seiten , Illustrationen
    Serie: CRREL Report 83-4
    Sprache: Englisch
    Anmerkung: 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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  • 57
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/2
    In: CRREL Report, 83-2
    Beschreibung / Inhaltsverzeichnis: A numerical model of rime ice accretion on an arbitrary two-dimensional airfoil is presented. The physics of the model are described and results are presented that demonstrate, by comparison with other theoretical data and experimental data, that the model predictions are believable. Results are also presented that illustrate the capability of the model to handle time-dependent rime ice accretion, taking into account the feedback between the ice accretion and the airflow and droplet trajectory fields.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 81 Seiten , Illustrationen
    Serie: CRREL Report 83-2
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Methodology Potential flow around an arbitrary airfoil Incompressible velocity field Droplet trajectory equation Computational procedure for trajectories Determining the point of impact Calculation of collision efficiencies Accreting an ice layer Determining the accuracy of the flow field Determining the accuracy of the trajectories Results and discussion Comparing results with and without the history term Collision efficiency of NACA 0015 airfoil at 8° attack angle Time-dependent accretion on NACA 0015 airfoil at 8° attack angle Time-dependent accretion on NACA 0015 airfoil at 0° attack angle Conclusions and recommendations Literature cited Appendix A : Sample input Appendix B: Sample output Appendix C : Program listing
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  • 58
    Monographie ausleihbar
    Monographie ausleihbar
    [Erscheinungsort nicht ermittelbar] : Department of Science and Technology, Antarctic Division Australia
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    Signatur: AWI P2-86-0256
    In: Antarctic Telecommunications Guidance Manual, Volume 1
    Materialart: Monographie ausleihbar
    Seiten: Diverse Seitenangaben (ca. 50 Seiten)
    Sprache: Englisch
    Anmerkung: TABLE OF CONTENTS: Distribution List. - List of acronyms and abbreviations used. - Record of Amendments. - Foreword to 1st Edition. - Foreword to 2nd Edition. - HISTORY AND DEVELOPMENTS OF ANTARCTIC COMMUNICATIONS. - CONSIDERATION OF TELECOMMUNICATIONS BY SCAR AND ANTARCTIC TREATY CONSULTATIVE PARTIES. - OPERATION OF INDIVIDUAL NATIONS' NETWORKS. - Australia's Antarctic Communications. - Japan's Antarctic communications. - UK Antarctic communications. - US Antarctic communications. - ANTARCTIC TREATY RESOLUTIONS ON ANTARCTIC COMMUNICATIONS. - WMO RESOLUTIONS AND PRINCIPLES ON ANTARCTIC COMMUNICATIONS. - Introduction. - Engineering principles of the GTS. - Functions and responsibilities of Meteorological Telecommunications Centres. - Characteristics of the networks of the GTS. - Operational principles of the GTS. - The transmission of meteorological data an the GTS. - Collection and transmission of meteorological data. - Data processing. - Telecommunications system. - Weather reporting by traverse parties. - Automatic weather station in the Antarctic. - AIREP reports. - Mobile ship stations. - OTHER RELEVANT RECOMMENDATIONS AND RESOLUTIONS. - APPENDIXES. - APPENDIX I. - Manual an the Global Data Processing System, Regional Aspects, the Antarctic. - APPENDIX II. - Network of CLIMAT and CLIMAT TEMP reporting stations in the Antarctic. - APPENDIX III. - Results of the monitoring of Antarctic data reception carried out during the period 12-15 March 1982. - APPENDIX IV. - Existing links for the daily international exchange of meteorological data within the Antarctic. - APPENDIX V. - Principal routes by which Antarctic meteorological data enters the GTS. - APPENDIX VI. - List of Antarctic stations and the routing of their meteorological data to the GTS.
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  • 59
    Signatur: ZSP-201-84/9
    In: CRREL Report, 84-9
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 107 Seiten , Illustrationen
    Serie: CRREL Report 84-9
    Sprache: Englisch
    Anmerkung: 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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  • 60
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/23
    In: CRREL Report, 82-23
    Beschreibung / Inhaltsverzeichnis: A direct filtration, water treatment pilot plant was operated on the Kenai River at Soldotna, Alaska, during the summer of 1980. The purpose of the pilot plant operations was to determine the feasibility of the direct filtration process for removal of glacial silt. The major criterion used to determine feasibility was production of water containing less than 1.0 NTU of turbidity. For the range of raw water turbidities encountered (22-34 NTU), the pilot plant testing indicated that direct filtration was feasible and could be considered as an alternative to conventional waiter treatment plants containing sedimentation tanks.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 26 Seiten , Illustrationen
    Serie: CRREL Report 82-23
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric Introduction Glacial characteristics Water treatment Materials and methods Experimental design Pilot plant intake Hydrocyclone Chemical addition system Flocculation system Filtration system Pilot plant operations Coagulant chemical preparations Flow measurement Sampling Results and discussion Kenai River w ater quality Evaluation of pilot plant testing Performance of pilot plant elements Physical and chem ical variables Conclusions Recommendations Literature cited
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  • 61
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/24
    In: CRREL Report, 82-24
    Beschreibung / Inhaltsverzeichnis: Velocity data derived from petroleum industry seismic records from Harrison Bay show that high-velocity material ( or = 2 km/s) interpreted to be ice-bonded permafrost is common. In the eastern part of the bay, the depth to high velocity material increases and velocity decreases in an orderly manner with increasing distance from shore until the layer is no longer apparent. The western part of the bay is less orderly, possibly reflecting a different geological and thermal history. This western part may be an inundated section of the low coastal plain characterized by the region north of Teshekpuk Lake, and could have contained deep thaw lakes, creating low velocity zones. Along some seismic lines, the high-velocity material extends approximately 25 km offshore. Two anomalies have been found which could be associated with rapidly degrading permafrost. One is strong attenuation, which was interpreted as an indication of gas in the shallow deposits. The other is the presence of considerable seismic noise, including identifiable small seismic events. The origin of this noise has not been positively established, and it is proposed that it may indicate that some movement is occurring in the sediments due to thaw.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 65 Seiten , Illustrationen
    Serie: CRREL Report 82-24
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Methods Reading records Refractions Reflections Rayleigh waves Spatial resolution Anomalies Results and discussion Seismic velocity distribution Attenuation Low-level natural seismicity Summary Literature cited Appendix A: Error estimates Appendix B: Velocity profiles Appendix C: Seismic cross sections
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  • 62
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    Signatur: ZSP-201-82/36
    In: CRREL Report, 82-36
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 42 Seiten , Illustrationen
    Serie: CRREL Report 82-36
    Sprache: Englisch
    Anmerkung: 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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  • 63
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    Signatur: ZSP-201-82/31
    In: CRREL Report, 82-31
    Beschreibung / Inhaltsverzeichnis: Information on sea ice conditions in the Bering Strait and the icefoot formation around Fairway Rock, located in the strait, is presented. Cross-sectional profiles of Fairway Rock and the relief of the icefoot are given along with theoretical analyses of the possible forces active during icefoot formation. It is shown that the ice cover most likely fails in flexure as opposed to crushing or buckling, as the former requires less force. Field observations reveal that the Fairway Rock icefoot is massive, with ridges up to 15 m high, a seaward face only 20 degrees from vertical, and interior ridge slopes averaging 33 degrees. The icefoot is believed to be grounded and its width ranges from less than 10 to over 100 m.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 44 Seiten , Illustrationen
    Serie: CRREL Report 82-31
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Bering Strait Field reconnaissance Estimation of ice forces on Fairway Rock 1. Creep deformation 2. Crushing failure 3. Flexural failure 4. Forces required to form floating or grounded pressure ridges along therock or to pile ice on the beaches 5. Buckling failure Driving forces Angle of internal friction of sea ice Summary Literature cited Appendix A: April 1982 field observations at Fairway Rock
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  • 64
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    Signatur: ZSP-201-82/33
    In: CRREL Report, 82-33
    Beschreibung / Inhaltsverzeichnis: Arctic sea ice is freckled with melt ponds during the ablation season; Antarctic sea ice has few, if any. On the basis of a simple surface heat budget, we investigate the meteorological conditions necessary for the onset of surface melting in an attempt to explain these observations. The low relative humidity associated with the relatively dry winds off the continent and an effective radiation parameter smaller than that characteristic of the Arctic are primarily responsible for the absence of melt features in the Antarctic. Together these require a surface-layer air temperature above 0 C before Antarctic sea ice can melt. A ratio of the bulk transfer coefficients C sub H/C sub E less than 1 also contributes to the dissimilarity in Arctic and Antarctic ablation seasons. The effects of wind speed and of the sea-ice roughness on the absolute values of C sub H and C sub E seem to moderate regional differences, but final assessment of this hypothesis awaits better data, especially from the Antarctic.
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    Seiten: 16 Seiten , Illustrationen
    Serie: CRREL Report 82-33
    Sprache: Englisch
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  • 65
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/19
    In: CRREL Report, 83-19
    Beschreibung / Inhaltsverzeichnis: Small-scale laboratory experiments were conducted on model bridge piers in the CRREL test basin. The experiments were performed by pushing model ice sheets against structures and monitoring the ice forces during the ice/structure interaction. The parameters, varied during the test program, were the geometry of the bridge piers and the velocity, thickness, and flexural strength of the ice. The results are presented in the form of ice forces on sloping and vertical structures with different geometries. During ice action on sloping structures, a phenomenon of transition of failure mode from bending to crushing was observed as the ice velocity was steadily increased.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 17 Seiten , Illustrationen
    Serie: CRREL Report 83-19
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Tests Results Ice forces on inclined structures Transition of ice action due to velocity increase Aspect ratio Bridge pier nose geometry Conclusions Literature cited
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  • 66
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    Signatur: ZSP-201-83/18
    In: CRREL Report, 83-18
    Beschreibung / Inhaltsverzeichnis: An evaluation of an impulse radar system for detecting cavities under concrete pavement is discussed, and field results are presented. It was found that a dual antenna mode of surveying was ideal for void detection. In this mode one antenna operated in a transceive mode and a second, offset from the first, operated in a receive-only mode. This arrangement allowed a refraction-type profile survey to be performed, which enabled subpavement voids to be easily detected. Field trails were held at Plattsburgh Air Force Base, where 28 cavities were detected and mapped. Drilling of holes verified that a cavity existed and allowed cavity depth to be measured. The cavities varied from 1.5 in. to 23 in, depth and were up to 20 ft. long.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 49 Seiten , Illustrationen
    Serie: CRREL Report 83-18
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Plattsburgh Air Force Base Radar sounding system Survey procedure Cavity inspection Radar cavity detection test Radar profile results Falling-weight deflectometer tests Discussion and conclusions Literature cited
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  • 67
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    Signatur: ZSP-201-83/13
    In: CRREL Report, 83-13
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 33 Seiten , Illustrationen
    Serie: CRREL Report 83-13
    Sprache: Englisch
    Anmerkung: 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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  • 68
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    Signatur: ZSP-201-83/14
    In: CRREL Report, 83-14
    Beschreibung / Inhaltsverzeichnis: An analysis of ice fracture that incorporates dislocation mechanics and linear elastic fracture mechanics is discussed. The derived relationships predict a brittle to ductile transition in polycrystalline ice under tension with a Hall-Petch type dependence of brittle fracture strength on grain size. A uniaxial tensile testing technique, including specimen preparation and loading system design was developed and employed to verify the model. The tensile strength of ice in purely brittle fracture was found to vary with the square root of the reciprocal of grain size, supporting the relationship that the theory suggests. The inherent strength of the ice lattice and the Hall-Petch slope are evaluated and findings discussed in relation to previous results. Monitoring of acoustic emissions was incorporated in the tests, providing insights into the process of microfracture during ice deformation.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 43 Seiten , Illustrationen
    Serie: CRREL Report 83-14
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Background Development of testing technique Test specimens Tensile testing Compression testing Experimental results Tensile tests Compression tests Discussion Conclusions Suggestions for further work Literature cited Appendix A: Additional information on seed grains Appendix B: Thin-sectioning procedure Appendix C: Displacement transducer calibration
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  • 69
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/16
    In: CRREL Report, 83-16
    Beschreibung / Inhaltsverzeichnis: The presence of snow on the ground can impose limitations on the mobility of wheeled and tracked vehicles. Snow depth and density are the two most easily measured snow properties that can be related to mobility over snow. Existing models of snowpack accumulation and ablation processes and models of internal snowpack structure were examined to determine if a model of the snowpack can be developed for use in predicting the snow parameters that affect mobility. Simple models, such as temperature index models, do not provide sufficient snowpack details, and the more detailed models require too many measured inputs. Components of the various models were selected from a basis of a snowpack model for predicting snow properties related to mobility over snow. Methods of obtaining the input data from some components are suggested, and areas where more development is needed are described.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 34 Seiten , Illustrationen
    Serie: CRREL Report 83-16
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Conversion of metric units Introduction Review of existing models Accumulation models Ablation models Using existing models for studying mobility Proposed snowpack model for mobility studies Model components Implementation of the model Developing input data Conclusions Literature cited
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  • 70
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    Signatur: ZSP-201-83/12
    In: CRREL Report, 83-12
    Beschreibung / Inhaltsverzeichnis: This paper documents the development and verification of two finite difference models that solve the general two-dimensional form of the heat conduction equation, using the alternative-direction implicit method. Both can handle convective, constant flux, specified temperature and semi-infinite boundaries. The conducting medium may be composed of many materials. The first program, ADI, solves for the case where no change of state occurs. ADIPC solves for case where a freeze/thaw change of phase may occur, using the apparent heat capacity method. Both models are verified by comparison to analytical results.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 74 Seiten , Illustrationen
    Serie: CRREL Report 83-12
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Finite differences applied to heat transfer Heat conduction equation Boundary conditions Phase change Computer program ADDATA, the data subroutine TRIDIG, the matrix solver ISOTHM, the isotherm finider ADI, main program ADEPC, main program Verification of ADI Comparison of ADI with analytical results Comparison of ADI with experimental results Verification of ADIPC Comparison of ADIPC with analytical results-the Neumann solution Comparison of ADIPC with analytical results-two-dimensional phase change verification User instruction for ADI User instruction for ADIPC Conclusions Literature cited Appendix A. Program INFSUM and sample input and output for program ADI Appendix B. Program ADIPC and sample input and output
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  • 71
    Signatur: ZSP-201-83/22
    In: CRREL Report, 83-22
    Beschreibung / Inhaltsverzeichnis: A new experimental method for measuring the soil-water diffusivity of frozen soil under isothermal conditions is introduced. The theoretical justification of the method is presented and the feasibility of the method is demonstrated by experiments conducted using marine-deposited clay. The measured values of the soil-water diffusivity are found comparable to reported experimental data.
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    Seiten: 13 Seiten , Illustrationen
    Serie: CRREL Report 83-22
    Sprache: Englisch
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  • 72
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    Signatur: ZSP-201-83/11
    In: CRREL Report, 83-11
    Beschreibung / Inhaltsverzeichnis: Investigations of ground radar performance over thawed and seasonally frozen silts, and sands and gravels containing artificial and natural reflectors were carried out in Alaska. The radar emitted 5-10 ns pulses, the center frequency of which was approximately 150 MHz. The artificial reflectors were metal sheets and discs and the natural reflectors were the groundwater table and interfaces between frozen and thawed material. The water table was profiled at three sites where the subsurface material was coarse-grained alluvium. Dielectric constants of 16 to 18 were measured for the thawed silts, 6 to 7 for the frozen silts and 3 to 9 for the sands and gravels. Signal penetration in the thawed high moisture content silts may be achieved only by use of a lower frequency radar, whereas in the sands and gravels greater depths may be detected with more sophisticated signal processing.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 16 Seiten , Illustrationen
    Serie: CRREL Report 83-11
    Sprache: Englisch
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  • 73
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-83/17
    In: CRREL Report, 83-17
    Beschreibung / Inhaltsverzeichnis: A sea ice model was applied to the East Greenland Sea to examine a 60-day ice advance period beginning 1 October 1979. This investigation compares model results using driving geostrophic wind fields derived from three sources. Winds calculated from sea-level pressures obtained from the National Weather Service's operational analysis system resulted in strong velocities concentrated in a narrow band adjacent to the Greenland coast, with moderate velocities elsewhere. The model showed excessive ice transport and thickness build-ups in the coastal region. The extreme pressure gradient parallel to the coast resulted partially from a pressure reduction procedure that was applied to the terrain-following sigma coordinate system to obtain sea-level pressures. Additional sea-level pressure fields were obtained from an independent optimal interpolation analysis that merged FGGE buoys drifting in the Arctic basin with high latitude land stations and from manual digitization of the NWS hand-analyzed Northern Hemisphere Surface Charts. Modeling results using winds from both of these fields agreed favorably.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 19 Seiten , Illustrationen
    Serie: CRREL Report 83-17
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Description of study Model results The problem Conclusions Literature cited
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  • 74
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/6
    In: CRREL Report, 84-6
    Beschreibung / Inhaltsverzeichnis: 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.
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    Seiten: vi, 28 Seiten , Illustrationen
    Serie: CRREL Report 84-6
    Sprache: Englisch
    Anmerkung: 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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  • 75
    Schriftenreihen ausleihbar
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-84/4
    In: CRREL Report, 84-4
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 18 Seiten , Illustrationen
    Serie: CRREL Report 84-4
    Sprache: Englisch
    Anmerkung: 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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  • 76
    Signatur: ZSP-980-70
    In: 2nd Working Meeting "Radioisotope Application and Radiation Processing in Industry", Part 2, 50 to 97
    In: ZfI-Mitteilungen, Nr. 70
    Materialart: Schriftenreihen ausleihbar
    Seiten: 355 Seiten , Illustrationen
    ISSN: 0323-8776
    Serie: ZfI-Mitteilungen 70
    Sprache: Englisch
    Anmerkung: 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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  • 77
    Signatur: AWI A3-20-93434
    In: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin, Band XXXII, Heft 1
    Materialart: Schriftenreihen ausleihbar
    Seiten: 121 Seiten , Illustrationen
    Serie: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin 32,1
    Sprache: Deutsch
    Anmerkung: Zugleich: Dissertation, Freie Unversität Berlin, [ca. 1963] , INHALTSVERZEICHNIS PROBLEMSTELLUNG UND ZIELSETZUNG 1. BEMERKUNGEN ZUM BEOBACHTUNGSGELÄNDE UND ZUM BEOBACHTUNGSMATERIAL 1.1 Das Beobachtungsgelände 1.2 Das Beobachtungsmaterial 2. HOMOGENITÄTSBETRACHTUNGEN 2.1 Temperatur 2.2 Niederschlag 2.3 Wind 2.4 Sonnenschein und Bewölkung 3. TEMPERATURVERHÄLTNISSE 3.1 Monats- und Jahreswerte 3.2 Tageswerte 3.3 Pentadenwerte 3.4 Häufigkeitsbetrachtungen 3.5 Interdiurne Veränderlichkeit 3.6 Der tägliche Gang 3.7 Vorkommen bestimmter Schwellenwerte 3.71 Frost- und Eistage 3.72 Sommer- und Tropentage 4. DER WASSERGEHALT DER LUFT 4.1 Monats- und Jahreswerte 4.2 Tageswerte 4.3 Häufigkeitsbetrachtungen 4.4 Interdiurne Veränderlichkeit 4.5 Der tägliche Gang 5. BEWÖLKUNGSVERHÄLTNISSE 5.1 Monats- und Jahreswerte 5.2 Tageswerte 5.3 Häufigkeitsbetrachtungen 5.4 Der tägliche Gang 5.5 Heitere und trübe Tage 5.6 Nebel 6. SONNENSCHEIN 6.1 Monats- und Jahreswerte 6.2 Tageswerte 6.3 Der tägliche Gang 7. NIEDERSCHLAGSVERHÄLTNISSE 7.1 Monats- und Jahreswerte 7.2 Niederschlagsbereitschaft 7.3 Tageswerte 7.4 Der tägliche Gang 7.5 Häufigkeitsbetrachtungen 7.6 Niederschlags- und Trockenperioden 7.7 Niederschlag und Wind· 7.8 Schneeverhältnisse 7.81 Schneefall und Schneedecke 7.82 Schneehöhe 7.9 Gewitter 8. WINDVERHÄLTNISSE 8.1 Windrichtung 8.2 Windgeschwindigkeit 8.21 Der jährliche Gang 8.22 Häufigkeitsbetrachtungen 8.23 Sturmtage und Windstillen 8.24 Der tägliche Gang 9.ZUSAMMENFASSUNG VERZEICHNIS DER TEXTTABELLEN VERZEICHNIS DER ABBILDUNGEN LITERATURVERZEICHNIS TABELLENANHANG
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  • 78
    Signatur: ZSP-799-370
    In: Trudy Ordena Lenina Arktičeskogo i Antarktičeskogo Naučno-Issledovatelʹskogo Instituta, Tom 370
    Materialart: Schriftenreihen ausleihbar
    Seiten: 163 Seiten , Illustrationen
    Serie: Trudy Ordena Lenina Arktičeskogo i Antarktičeskogo Naučno-Issledovatelʹskogo Instituta 370
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
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  • 79
    Monographie ausleihbar
    Monographie ausleihbar
    Leipzig : Academy of Sciences of the GDR, Central Institute for Isotope and Radiation Research
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    Signatur: AWI G6-19-93042-2
    In: Interregional Training Course on Radiochemistry, [Supplement]
    Materialart: Monographie ausleihbar
    Seiten: 88 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: 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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  • 80
    Signatur: AWI A3-20-93434-2
    In: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin, Band XXXII, Heft 2
    Materialart: Schriftenreihen ausleihbar
    Seiten: 218 Seiten , Illustrationen
    Serie: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin 32,2
    Sprache: Deutsch
    Anmerkung: Zugleich: Dissertation, Freie Unversität Berlin, [ca. 1963] , INHALTSVERZEICHNIS PROBLEMSTELLUNG UND ZIELSETZUNG 1. BEMERKUNGEN ZUM BEOBACHTUNGSGELÄNDE UND ZUM BEOBACHTUNGSMATERIAL 1.1 Das Beobachtungsgelände 1.2 Das Beobachtungsmaterial 2. HOMOGENITÄTSBETRACHTUNGEN 2.1 Temperatur 2.2 Niederschlag 2.3 Wind 2.4 Sonnenschein und Bewölkung 3. TEMPERATURVERHÄLTNISSE 3.1 Monats- und Jahreswerte 3.2 Tageswerte 3.3 Pentadenwerte 3.4 Häufigkeitsbetrachtungen 3.5 Interdiurne Veränderlichkeit 3.6 Der tägliche Gang 3.7 Vorkommen bestimmter Schwellenwerte 3.71 Frost- und Eistage 3.72 Sommer- und Tropentage 4. DER WASSERGEHALT DER LUFT 4.1 Monats- und Jahreswerte 4.2 Tageswerte 4.3 Häufigkeitsbetrachtungen 4.4 Interdiurne Veränderlichkeit 4.5 Der tägliche Gang 5. BEWÖLKUNGSVERHÄLTNISSE 5.1 Monats- und Jahreswerte 5.2 Tageswerte 5.3 Häufigkeitsbetrachtungen 5.4 Der tägliche Gang 5.5 Heitere und trübe Tage 5.6 Nebel 6. SONNENSCHEIN 6.1 Monats- und Jahreswerte 6.2 Tageswerte 6.3 Der tägliche Gang 7. NIEDERSCHLAGSVERHÄLTNISSE 7.1 Monats- und Jahreswerte 7.2 Niederschlagsbereitschaft 7.3 Tageswerte 7.4 Der tägliche Gang 7.5 Häufigkeitsbetrachtungen 7.6 Niederschlags- und Trockenperioden 7.7 Niederschlag und Wind· 7.8 Schneeverhältnisse 7.81 Schneefall und Schneedecke 7.82 Schneehöhe 7.9 Gewitter 8. WINDVERHÄLTNISSE 8.1 Windrichtung 8.2 Windgeschwindigkeit 8.21 Der jährliche Gang 8.22 Häufigkeitsbetrachtungen 8.23 Sturmtage und Windstillen 8.24 Der tägliche Gang 9.ZUSAMMENFASSUNG VERZEICHNIS DER TEXTTABELLEN VERZEICHNIS DER ABBILDUNGEN LITERATURVERZEICHNIS TABELLENANHANG
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  • 81
    Signatur: ZSP-201-82/15
    In: CRREL Report, 82-15
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 8 Seiten , Illustrationen
    Serie: CRREL Report 82-15
    Sprache: Englisch
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  • 82
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/14
    In: CRREL Report, 82-14
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 20 Seiten , Illustrationen
    Serie: CRREL Report 82-14
    Sprache: Englisch
    Anmerkung: 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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  • 83
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-80/9
    In: CRREL Report, 80-9
    Beschreibung / Inhaltsverzeichnis: Explosive cratering tests were conducted in seasonally frozen and thawed gravel at Ft. Richardson near Anchorage, Alaska, and in seasonallly frozen and thawed silt overlying permafrost and in silt permafrost at Ft. Wainwright near Fairbanks, Alaska. Explosive charge weights ranged from 26 to 3120 lb and charge burial depths ranged from about 3 to 40 ft. The cube root of the charge weight scaling was used to determine maximum scaled crater dimensions and optimum scaled depth of burial of the charge. Test results for frozen and thawed gravel were essentially the same because of the low moisture content and the relatively shallow depth of freezing (5 to 6 ft). The optimum depth of burial of the charge for maximizing the apparent radius and depth and the true radius was about 1.8 times the cube root of the charge weight for both the frozen and thawed conditions. In seasonally frozen silt overlying a talik and silt permafrost the maximum scaled crater dimensions and optimum scaled burial depths of the charge were smaller than for the thawed condition except for the true crater dimensions. The channeling of energy in the talik produces maximum crater dimensions and an optimum burial depth for the true crater that is larger than for the thawed condition. The results for the homogeneous silt permafrost were very similar to the frozen gravel results with much smaller maximum crater dimensions and smaller optimum charge burial depths than for the thawed silt overlying permafrost.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 21 Seiten , Illustrationen
    Serie: CRREL Report 80-9
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Metric conversion table Introduction Test sites Test procedures and materials Analysis of test data Mobility tests Conclusions Literature cited
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  • 84
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/19
    In: CRREL Report, 81-19
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 17 Seiten , Illustrationen
    Serie: CRREL Report 81-19
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction The experiment Results Maps of completely frozen North Slope lakes Literature cited
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  • 85
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/18
    In: CRREL Report, 81-18
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ix, 59 Seiten , Illustrationen
    Serie: CRREL Report 81-18
    Sprache: Englisch
    Anmerkung: 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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  • 86
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/22
    In: CRREL Report, 81-22
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 43 Seiten , Illustrationen
    Serie: CRREL Report 81-22
    Sprache: Englisch
    Anmerkung: 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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  • 87
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/25
    In: CRREL Report, 81-25
    Beschreibung / Inhaltsverzeichnis: The problem of heat conduction with phase changeAoften called the Stefan problemrincludes some of the mostintractable mathematical areas of heat transfer. Exact solutions are extremely limited and approximate methodsare widely used. This report discusses the collocation method for the heat balj ce integral approximation. The methodis applied to some standard problems of phase change-Neumann's problem-and a new solution is presented for thecase of surface convection for a semi-infinite body. Numerical results are given for soil systems and also for materialsof interest in latent heat thermal storage.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 14 Seiten , Illustrationen
    Serie: CRREL Report 81-25
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Conversion factors Introduction Collocation method Neumann problem Specified surface heat flux Convective surface heat flux Insulated semi-infinite body Conclusion Literature cited Appendix A: Program listing for numerical quadrature of equation 28
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  • 88
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/26
    In: CRREL Report, 81-26
    In: Mechanics of cutting and boring, Part 7
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 38 Seiten , Illustrationen
    Serie: CRREL Report 81-26
    Sprache: Englisch
    Anmerkung: 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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  • 89
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/27
    In: CRREL Report, 81-27
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 16 Seiten , Illustrationen
    Serie: CRREL Report 81-27
    Sprache: Englisch
    Anmerkung: 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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  • 90
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/16
    In: CRREL Report, 81-16
    Beschreibung / Inhaltsverzeichnis: An air-transportable shelter designed and built at CRREL for use in cold regions underwent testing in Hanover, New Hampshire, and Ft. Greely, Alaska. The shelter demonstrated some of its capabilities for mobility by being towed for more than 60 miles behind various vehicles and by being transported on a C-130 cargo airplane, a CH-47 helicopter, and a trailer truck. The shelter proved to be very easy for a crew of two to four to set up in all weather conditions including -40 F cold. However, the gasoline-powered generator, which was a source for space heat as well as electricity, functioned very poorly. Overall, the prototype successfully demonstrated qualities of self-reliance, ease of operation and thermal efficiency.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 20 Seiten , Illustrationen
    Serie: CRREL Report 81-16
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Metric conversion factors Summary Introduction Description of shelter Test procedures and results Mobility Ease of erecting and striking Therinal efficiency and performance Heat output Electrical system Habitation Safety features Water system Shelter reliability Structure Performance of other shelters Conclusions Future studies Literature cited
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  • 91
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/1
    In: CRREL Report, 81-01
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 26 Seiten , Illustrationen
    Serie: CRREL Report 81-01
    Sprache: Englisch
    Anmerkung: 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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  • 92
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/17
    In: CRREL Report, 81-17
    Beschreibung / Inhaltsverzeichnis: 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
    Materialart: Schriftenreihen ausleihbar
    Seiten: 38 Seiten , Illustrationen
    Serie: CRREL Report 81-17
    Sprache: Englisch
    Anmerkung: 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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  • 93
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/2
    In: CRREL Report, 81-2
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 16 Seiten , Illustrationen
    Serie: CRREL Report 81-2
    Sprache: Englisch
    Anmerkung: 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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  • 94
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/6
    In: CRREL Report, 81-6
    Beschreibung / Inhaltsverzeichnis: Abstract: A procedure is described for monitoring the microfracturing activity in ice plates subjected to constant loads. Sample time records of freshwater ice plate deflections as well as corresponding total acoustic emission activities are presented. The linear elastic, as well as viscoelastic, response for a simply supported rectangular ice plate is given. Suggested future work using the above procedure is discussed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 19 Seiten , Illustrationen
    Serie: CRREL Report 81-6
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Notation Introduction Experimental procedure and considerations Growth of the ice plate Support of the ice plate Acoustic emission monitoring system Displacement transducers and data recording Mechanical loading System Analysis Experimental results Thin section analysis Summary and discussion Literature cited Appendix A : Ice plate linear elastic response Appendix B: Acoustic emission system sensitivity Appendix C: Ice plate linear viscoelastic response Appendix D: Equipment list
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  • 95
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/9
    In: CRREL Report, 81-9
    Beschreibung / Inhaltsverzeichnis: Abstract: The calculation of the largest horizontal force a relatively thin floating ice plate may exert on a structure requires the knowledge of the buckling load for this floating plate. In the published literature on the stability of continuously supported beams and plates, it is usually assumed that this buckling force corresponds to the lowest bifurcation force Pcr. However, recent studies indicate that, generally, this is not the case, and this report clarifies the situation for floating ice plates. This problem is first studied on a simple model that exhibits the buckling mechanism of a floating ice plate but is amenable to an exact nonlinear analysis. This study shows that, depending on the ratio of the rigidities of the "liquid" and "plate," the post-buckling branch may rise or drop away from the bifurcation point. Thus, Pcr may or may not be the actual buckling load. It is also shown that when lift-off of "plate" from the "liquid" takes place the actual buckling load may drop substantially. This study is followed by an analysis of a floating compressed semi-infinite plate with a straight free edge, assuming that there is no lift-off. It is found that for this case there always exists a buckling load that is lower than Pcr. According to the obtained results, the value Pcr should be used with caution as a buckling load for floating ice plates. It is suggested that the buckling load be determined using the postbuckling equilibrium branch of the plate, taking into consideration the possibility of lift-off of the ice cover from the liquid base.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 7 Seiten , Illustrationen
    Serie: CRREL Report 81-9
    Sprache: Englisch
    Standort: AWI Archiv
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  • 96
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/15
    In: CRREL Report, 81-15
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 10 Seiten , Ilustrationen
    Serie: CRREL Report 81-15
    Sprache: Englisch
    Anmerkung: 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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  • 97
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-82/21
    In: CRREL Report, 82-21
    Beschreibung / Inhaltsverzeichnis: The acoustic emission response from fine-grained polycrystalline ice subjected to constant compressive loads was examined. A number of tests were conducted with the nominal stress ranging from 0.8 to 3.67 MPa at a temperature of -5 C. The acoustic emission response was recorded and the data are presented with respect to time and strain. The source of acoustic emissions in ice is considered in terms of the formation of both microfractures and visible fractures that develop without catastrophic failure of the ice. A model to describe the acoustic emission response is developed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 15 Seiten , Illustrationen
    Serie: CRREL Report 82-21
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Background Experimental procedures Ice specimens Mechanical test equipment Acoustic emission equipment Data recording Acoustic emission sources in ice Acoustic events and visible fracturing Source mechanisms Tests on ice single crystals General acoustic emission response Analysis of data Transient response Steady-state response Amplitude distribution Combined transient and steady-state response in the time domain Discussion Summary Literature cited
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  • 98
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    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/20
    In: CRREL Report, 81-20
    Beschreibung / Inhaltsverzeichnis: A historical review of research is presented to establish the state- of-the-art for analyzing the behavior of vehicles in shallow snow. From this review, the most comprehensive and promising model is put together to establish a first-cut performance prediction model for vehicles operating in shallow snow, slush, ice and thawing soils.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 21 Seiten , Illustrationen
    Serie: CRREL Report 81-20
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface List of symbols Introduction Historical review Model selection Traction Resistance Slush and thawing soils Ice, hard-packed snow, packed snow River and lake ice Model use Conclusions Literature cited
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  • 99
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/21
    In: CRREL Report, 81-21
    Beschreibung / Inhaltsverzeichnis: The reflection of solar radiation by a snow cover in situ and the apparent influence of selected substrates were examined in wavelength bands centered at 0.81, 1.04, 1.10, 1.30, 1.50 and 1.80 micrometers. Substrates included winter wheat, timothy, corn, alfalfa, grass, concrete and subsurface layers of 'crusty' snow and ice. Reasonable qualitative agreement between measurements and theoretical predictions was demonstrated, with indications of quantitative agreement in the definition of a 'semi-infinite depth' of snow cover. It was concluded that ultimate quantitative agreement between theory and measurement will require that an 'optically effective grain size' be defined in terms of physically measuarable dimensions or meteorologically predictable characteristics of the ice crystals composing the snowpack.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 17 Seiten , Illustrationen
    Serie: CRREL Report 81-21
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Experimental method Substrate preparation Experimental configuration Radiometric measurements Snow characterization Reflectance standards Data analysis Reflectance measurements Snow replica analysis Discussion of results Comparative reflectance of various substrates under snow Ablation of a snow cover Reflectance from a very light, fresh snow cover Measurements at angles other than vertical Reflectance from substrates Concluding observations Literature cited
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  • 100
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-81/24
    In: CRREL Report, 81-24
    Beschreibung / Inhaltsverzeichnis: 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.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vii, 53 Seiten , Illustrationen
    Serie: CRREL Report 81-24
    Sprache: Englisch
    Anmerkung: 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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