Kooperativer Bibliotheksverbund

UID:

Format: 301 S. , 22 cm

Edition: 1. Aufl.

ISBN: 978-3-95757-090-1

Content: Georg Forster (1754-1794) war eine der faszinierendsten Gestalten seiner Zeit: glänzender Schriftsteller, Naturforscher, Entdecker, Zeichner, Übersetzer und entschiedener Revolutionär. Auf seiner Weltumsegelung mit James Cook berührte er Eisberge mit den eigenen Händen, lief den Strand von Tahiti entlang, besuchte fremde Völker, lebte unter »Menschenfressern« und überquerte Ozeane und den Äquator. Und er stand im Zentrum des politischen Geschehens, als er - inspiriert von der Französischen Revolution - 1793 die »Mainzer Republik« ausrief, die erste Republik auf deutschem Boden. Anschaulich und fesselnd portraitiert Jürgen Goldstein dieses Ausnahmeleben, in dem sich »Freiheit« und »Naturgewalt« berührten. Niemand ist auf vergleichbare Weise das erfahrungsgetriebene Experiment eingegangen, die Natur mit dem Politischen kurzzuschließen. Die Funken, die Forster aus seinen Leitvorstellungen schlug, erhellten für einen Weltaugenblick die Aussicht, es könne so etwas wie natürliche Revolutionen geben. Jürgen Goldstein, geboren 1962, lehrt als Professor für Philosophie an der Universität Koblenz-Landau. Maßgeblich von Hans Blumenberg inspiriert, widmen sich seine Studien der Genese und dem Profil der Moderne. Seine Bücher befassen sich mit der Herausbildung der neuzeitlichen Subjektivität und Rationalität, der politischen Philosophie des 20. Jahrhunderts und der Geschichte der Naturwahrnehmung.

Content: Wagemutiger Entdeckungsreisender, empfindsamer Naturbetrachter, glühender Revolutionär: Georg Forster befuhr mit James Cook die Weltmeere, verfasste glänzende Reiseerzählungen und stürzte sich mit provokanten Ansichten in die politischen Debatten seiner Zeit. Er war in Mainz Mitbegründer der ersten Republik auf deutschem Boden und starb - gescheitert und vereinsamt - im Pariser Exil. In seiner ebenso fesselnden wie kenntnisreichen Biographie entwirft Jürgen Goldstein mit Eleganz und Tiefenschärfe ein anschauliches Panorama von Forsters rastlosem Leben zwischen Euphorie und Elend - das Leben eines Weltbürgers, der davon überzeugt war, dass sich die Freiheit eines Tages mit Naturgewalt ihren Wag bahnen müsse.

Note: Inhalt: Auftakt. - Ein gefährliches Wort: Natur. - 1. 1754-1772. ANFÄNGE. - Wie ein unbeschriebenes Blatt. - Erste Eindrücke von Weite. - Zur rechten Zeit am rechten Ort. - 2. 1772-1775. ANSICHTEN DER NATUR: DIE REISE UM DIE WELT. - Wahrnehmungsmuster. - Die große Erzählung. - Das Meer. - Entfernungen. - Strapazen. - Wagnisse im Eis. - Das sonnige Arkadien. - Erste und letzte Anblicke. - Edle Wilde?. - Unter Menschenfressern. - Mord und Totschlag. - Eine Gemeinschaft von Gleichen. - Die gekränkten Rechte der Menschheit. - 3. 1776-1788. ZWISCHENSPIELE. - Blue devils. - Der Balsam der Natur. - Eine physische Anthropologie. - Ein Streit um Menschenrassen. - Politisches Wetterleuchten: Cook, der Staatsmann. - 4. 1789-1793. ANSICHTEN DES POLITISCHEN: DIE REVOLUTION. - Pariser Unruhen und politische Öffentlichkeit. - Geschichtszeichen der neuen Welt: Revolutionen. - Politische Ansichten vom Niederrhein. - Natur als Schicksal. - Das Prinzip des politischen Wandels: Gärung. - Die französische Mainzer Freiheit. - Die Mainzer Republik. - Kundige der unterirdischen Gänge: Forster und Goethe. - 5. 1793-1794. DAS ENDE: DIE GROßE RATLOSIGKEIT. - Das ungeheure Haupt der Revolution: Paris. - Das kalte Fieber des Terrors. - Tänzer am Rande des Unsinns: Adam Lux. - Zurück zur Natur: Menschenwürde. - Die Revolution ist die Revolution. - Verlassen wie ein Kind. - Eine Quelle sonderbarer Beschauung. - Schluss. - Das Mahagoni-Schränkchen. - Anmerkungen. - Literatur.

Language: English

UID:

Format: XVIII, 782 S. : graph. Darst., Kt.

ISBN: 978-1-107-01603-3

Content: Thermodynamics, Kinetics and Microphysics of Clouds presents a unified theoretical foundation that provides the basis for incorporating cloud microphysical processes in cloud and climate models. In particular, the book provides: • a theoretical basis for understanding the processes of cloud particle formation, evolution and precipitation, with emphasis on spectral cloud microphysics based on numerical and analytical solutions of the kinetic equations for the drop and crystal size spectra along with the supersaturation equation; • the latest detailed theories and parameterizations of drop and crystal nucleation suitable for cloud and climate models derived from the general principles of thermodynamics and kinetics; • a platform for advanced parameterization of clouds in weather prediction and climate models; • the scientific foundation for weather and climate modification by cloud seeding. This book will be invaluable for researchers and advanced students engaged in cloud and aerosol physics, and air pollution and climate research.

Note: Contents: Preface. - 1. Introduction. - 1.1. Relations among Thermodynamics, Kinetics, and Cloud Microphysics. - 1.2. The Correspondence Principle. - 1.3. Structure of the Book. - 2. Clouds and Their Properties. - 2.1. Cloud Classification. - 2.2. Cloud Regimes and Global Cloud Distribution. - 2.2.1. Large-Scale Condensation in Fronts and Cyclones. - 2.2.2. Sc-St Clouds and Types of Cloud-Topped Boundary Layer. - 2.2.3. Convective Cloudiness in the Intertropical Convergence Zone. - 2.2.4. Orographic Cloudiness. - 2.3. Cloud Microphysical Properties. - 2.4. Size Spectra and Moments. - 2.4.1. Inverse Power Laws. - 2.4.2. Lognormal Distributions. - 2.4.3. Algebraic Distributions. - 2.4.4. Gamma Distributions. - 2.5. Cloud Optical Properties. - Appendix A.2. Evaluation of the Integrals with Lognormal Distribution. - 3. Thermodynamic Relations. - 3.1. Thermodynamic Potentials. - 3.2. Statistical Energy Distributions. - 3.2.1. The Gibbs Distribution. - 3.2.2. The Maxwell Distribution. - 3.2.3. The Boltzmann Distribution. - 3.2.4. Bose–Einstein Statistics. - 3.2.5. Fermi–Dirac Statistics. - 3.3. Phase Rules. - 3.3.1. Bulk Phases. - 3.3.2. Systems with Curved Interfaces. - 3.4. Free Energy and Equations of State. - 3.4.1. An Ideal Gas. - 3.4.2. Free Energy and the van der Waals Equation of State for a Non-Ideal Gas. - 3.5. Thermodynamics of Solutions. - 3.6. General Phase Equilibrium Equation for Solutions. - 3.6.1. General Equilibrium Equation. - 3.6.2. The Gibbs–Duhem Relation. - 3.7. The Clausius–Clapeyron Equation. - 3.7.1. Equilibrium between Liquid and Ice Bulk Phases. - 3.7.2. Equilibrium of a Pure Water Drop with Saturated Vapor. - 3.7.3. Equilibrium of an Ice Crystal with Saturated Vapor. - 3.7.4. Humidity Variables. - 3.8. Phase Equilibrium for a Curved Interface - The Kelvin Equation. - 3.9. Solution Effects and the Köhler Equation. - 3.10. Thermodynamic Properties of Gas Mixtures and Solutions. - 3.10.1. Partial Gas Pressures in a Mixture of Gases. - 3.10.2. Equilibrium of Two Bulk Phases around a Phase Transition Point. - 3.10.3. Raoult’s Law for Solutions. - 3.10.4. Freezing Point Depression and Boiling Point Elevation. - 3.10.5. Relation of Water Activity and Freezing Point Depression. - 3.11. A diabatic Processes. - 3.11.1. Dry Adiabatic Processes. - 3.11.2. Wet Adiabatic Processes. - Appendix A.3. Calculation of Integrals with the Maxwell Distribution. - 4. Properties of Water and Aqueous Solutions. - 4.1. Properties of Water at Low Temperatures and High Pressures. - 4.1.1. Forms of Water at Low Temperatures. - 4.1.2. Forms of Water at High Pressures. - 4.2. Theories of Water. - 4.3. Temperature Ranges in Clouds and Equivalence of Pressure and Solution Effects. - 4.4. Parameterizations of Water and Ice Thermodynamic Properties. - 4.4.1. Saturated Vapor Pressures. - 4.4.2. Heat Capacity of Water and Ice. - 4.4.3. Latent Heats of Phase Transitions. - 4.4.4. Surface Tension between Water and Air or Vapor. - 4.4.5. Surface Tension between Ice and Water or Solutions. - 4.4.6. Surface Tension between Ice and Air or Vapor. - 4.4.7 Density of Water. - 4.4.8. Density of Ice. - 4.5. Heat Capacity and Einstein-Debye Thermodynamic Equations of State for Ice. - 4.6. Equations of State for Ice in Terms of Gibbs Free Energy. - 4.7. Generalized Equations of State for Fluid Water. - 4.7.1. Equations of the van der Waals Type and in Terms of Helmholtz Free Energy. - 4.7.2. Equations of State Based on the Concept of the Second Critical Point. - Appendix A.4. Relations among Various Pressure Units. - 5. Diffusion and Coagulation Growth of Drops and Crystals. - 5.1. Diffusional Growth of Individual Drops. - 5.1.1. Diffusional Growth Regime. - 5.1.2. The Kinetic Regime and Kinetic Corrections to the Growth Rate. - 5.1.3. Psychrometric Correction Due to Latent Heat Release. - 5.1.4. Radius Growth Rate. - 5.1.5. Ventilation Corrections. - 5.2. Diffusional Growth of Crystals. - 5.2.1. Mass Growth Rates. - 5.2.2. Axial Growth Rates. - 5.2.3. Ventilation Corrections. - 5.3. Equations for Water and Ice Supersaturations. - 5.3.1. General Form of Equations for Fractional Water Supersaturation. - 5.3.2. Supersaturation Relaxation Times and Their Limits. - 5.3.3. E quation for Water Supersaturation in Terms of Relaxation Times. - 5.3.4. Equivalence of Various Forms of Supersaturation Equations. - 5.3.5. Equation for Fractional Ice Supersaturation. - 5.3.6. Equilibrium Supersaturations over Water and Ice. - Liquid Clouds. - Ice Clouds. - Mixed Phase Clouds. - 5.3.7. A diabatic Lapse Rates with Non zero Supersaturations. - 5.4. The Wegener–Bergeron–Findeisen Process and Cloud Crystallization. - 5.5. Kinetic Equations of Condensation and Deposition in the Adiabatic Process. - 5.5.1. Derivation of the Kinetic Equations. - 5.5.2. Some Properties of Regular Condensation. - 5.5.3. Analytical Solution of the Kinetic Equations of Regular Condensation. - 5.5.4. Equation for the Integral Supersaturation. - 5.6. Kinetic Equations of Coagulation. - 5.6.1. Various Forms of the Coagulation Equation. - 5.6.2. Collection Kernels for Various Coagulation Processes. - Brownian Coagulation. - Gravitational Coagulation. - 5.7. Thermodynamic and Kinetic Equations for Multidimensional Models. - 5.8. Fast Algorithms for Microphysics Modules in Multidimensional Models. - 6. Wet Aerosol Processes. - 6.1. Introduction. - 6.1.1. Empirical Parameterizations of Hygroscopic Growth. - 6.1.2. Empirical Parameterizations of Droplet Activation. - 6.2. Equilibrium Radii. - 6.2.1. Equilibrium Radii at Subsaturation. - 6.2.2. Equilibrium Radii of Interstitial Aerosol in a Cloud. - 6.3. Critical Radius and Supersaturation. - 6.4. Aerosol Size Spectra. - 6.4.1. Lognormal and Inverse Power Law Size Spectra. - 6.4.2. Approximation of the Lognormal Size Spectra by the Inverse Power Law. - 6.4.3. Examples of the Lognormal Size Spectra, Inverse Power Law, and Power Indices. - 6.4.4. Algebraic Approximation of the Lognormal Distribution. - 6.5. Transformation of the Size Spectra of Wet Aerosol at Varying Humidity. - 6.5.1. Arbitrary Initial Spectrum of Dry Aerosol. - 6.5.2. Lognormal Initial Spectrum of Dry Aerosol. - 6.5.3. Inverse Power Law Spectrum. - 6.5.4. Algebraic Size Spectra. - 6.6. CCN Differential Supersaturation Activity Spectrum. - 6.6.1. A rbitrary Dry Aerosol Size Spectrum. - 6.6.2. Lognormal Activity Spectrum. - 6.6.3. Algebraic Activity Spectrum. - 6.7. Droplet Concentration and the Modified Power Law for Drops Activation. - 6.7.1. Lognormal and Algebraic CCN Spectra. - 6.7.2. Modified Power Law for the Drop Concentration. - 6.7.3. Supersaturation Dependence of Power Law Parameters. - Appendix A.6. Solutions of Cubic Equations for Equilibrium and Critical Radii. - 7. Activation of Cloud Condensation Nuclei into Cloud Drops. - 7.1. Introduction. - 7.2. Integral Supersaturation in Liquid Clouds with Drop Activation. - 7.3. Analytical Solutions to the Supersaturation Equation. - 7.4. Analytical Solutions for the Activation Time, Maximum Supersaturation, and Drop Concentration. - 7.5. Calculations of CCN Activation Kinetics. - 7.6. Four Analytical Limits of Solution. - 7.7. Limit #1: Small Vertical Velocity, Diffusional Growth Regime. - 7.7.1. Lower Bound. - 7.7.2. Upper Bound. - 7.7.3. Comparison with Twomey’s Power Law. - 7.8. Limit #2: Small Vertical Velocity, Kinetic Growth Regime. - 7.8.1. Lower Bound. - 7.8.2. Upper Bound. - 7.9. Limit #3: Large Vertical Velocity, Diffusional Growth Regime. - 7.9.1. Lower Bound. - 7.9.2. Upper Bound. - 7.10. Limit #4: Large Vertical Velocity, Kinetic Growth Regime. - 7.10.1. Lower Bound. - 7.10.2. Upper Bound. - 7.11. Interpolation Equations and Comparison with Exact Solutions. - Appendix A.7. Evaluation of the Integrals J2 and J3 for Four Limiting Cases. - 8. Homogeneous Nucleation. - 8.1. Metastable States and Nucleation of a New Phase. - 8.2. Nucleation Rates for Condensation and Deposition. - 8.2.1. Application of Boltzmann Statistics. - 8.2.2. The Fokker–Planck

Language: English

UID:

Format: 368 Seiten , Illustrationen

ISBN: 9783991310150

Language: German

Keywords: Biografie

UID:

Format: xiii, 454 Seiten , Illustrationen, Diagramme, Karten

ISBN: 978-1-405-10006-9

Note: Contents Preface Acknowledgements 1 Introduction 1.1 The Periglacial Concept: Definitions and Scope 1.2 The Periglacial Realm 1.3 The Development of Periglacial Geomorphology 1.4 Periglacial Geomorphology: The Quaternary Context 1.5 The Aims and Organization of this Book 2 Periglacial Environments 2.1 Introduction 2.2 Periglacial Climates 2.3 Soils in Periglacial Environments 2.4 Vegetation Cover in Periglacial Environments 2.5 Synthesis 3 Ground Freezing and Thawing 3.1 Introduction 3.2 Ground Heating and Cooling 3.3 Soil Freezing 3.4 Ice Segregation in Freezing Soils 3.5 Thaw Consolidation 3.6 Synthesis 4 Permafrost 4.1 Introduction 4.2 Permafrost Thermal Regime 4.3 Classification of Permafrost 4.4 Detection, Mapping and Modelling of Permafrost 4.5 Permafrost Distribution 4.6 Permafrost-glacier Interactions 4.7 The Geomorphic Importance of Permafrost 5 Ground Ice and Cryostratigraphy 5.1 Introduction 5.2 Genetic Classification of Ground Ice 5.3 Description of Ground Ice 5.4 Ice Contacts 5.5 Cryostratigraphy 5.6 The Transition Zone 5.7 Massive Ground Ice 5.8 Yedoma 6 Thermal Contraction Cracking: Ice Wedges and Related Landforms 6.1 Introduction 6.2 Thermal Contraction Cracking and Polygon Evolution 6.3 Ice Veins and Ice Wedges 6.4 Ice-wedge Polygons 6.5 Sand Veins and Sand Wedges 6.6 Composite Veins and Composite Wedges 6.7 Sand-wedge Polygons 6.8 Frost Cracking of Seasonally Frozen Ground 6.9 Thaw Modification of Frost Wedges 6.10 Frost-Wedge Pseudomorphs and Frost Polygons in Areas of Past Permafrost 7 Pingos, Palsas and other Frost Mounds 7.1 Introduction 7.2 Characteristics of Pingos 7.3 Hydrostatic Pingos 7.4 Hydraulic Pingos 7.5 Pingo Problems and Problem Pingos 7.6 Segregation Ice Mounds: Palsas, Lithalsas and Related Landforms 7.7 Palsas 7.8 Peat Plateaus 7.9 Lithalsas 7.10 Permafrost Plateaus 7.11 Other Permafrost Mounds 7.12 Ephemeral Frost Mounds 7.13 Relict Permafrost Mounds 8 Thermokarst 8.1 Introduction 8.2 Thermokarst Lakes and Drained Lake Basins 8.3 Thermokarst Pits, Bogs and Fens 8.4 Retrogressive Thaw Slumps 8.5 Small-scale Thermokarst Features: Beaded Streams, Sinkholes and Thermokarst Gullies 8.6 Sediment Structures associated with Thermokarst 8.7 Relict Thermokarst Phenomena 9 Seasonally Frozen Ground Phenomena 9.1 Introduction 9.2 Upfreezing of Clasts 9.3 Frost Heave of Bedrock 9.4 Patterned Ground: The Embroidery on the Landscape 9.5 Patterned Ground Processes 9.6 Sorted Patterned Ground 9.7 Nonsorted Patterned Ground 9.8 Cryoturbations 9.9 Pedogenic Effects of Freezing and Thawing 9.10 Fragipans 9.11 Synthesis 10 Rock Weathering and Associated Landforms 10.1 Introduction 10.2 Physical Weathering Processes 10.3 Chemical Weathering Processes 10.4 Biotic Weathering Processes 10.5 Weathering Processes in Periglacial Environments 10.6Cold-climate Karst 10.7 Tors 10.8 Blockfields and Related Periglacial Regolith Covers 10.9 Brecciated Bedrocks 11 Periglacial Mass Movement and Hillslope Evolution 11.1 Introduction 11.2 Solifluction Processes 11.3 Solifluction Landforms 11.4 Pleistocene Solifluction Landforms and Slope Deposits 11.5 Active-layer Failures 11.6 Permafrost Creep 11.7 Nivation 11.8 Cryoplanation 11.9 Slope Form and Slope Evolution 12 Talus Slopes and Related Landforms 12.1 Introduction 12.2 Rockfall Talus 12.3 The Geomorphic Role of Snow Avalanches 12.4 Debris-flow Activity 12.5 Rock Glaciers 12.6 Pronival (Protalus) Ramparts 12.7 Synthesis 13 Fluvial Processes and Landforms 13.1 Introduction 13.2 Periglacial Hydrology 13.3 Slopewash 13.4 Slushflows 13.5 Sediment Transport in Periglacial Rivers 13.6 Bank and Channel Erosion 13.7 River Channels 13.8 Alluvial Landforms in Periglacial Environments 13.9 Valley Form 13.10 Pleistocene Periglacial Rivers 13.11 Synthesis 14 Wind Action 14.1 Introduction 14.2 Aeolian Processes 14.3 Wind Erosion in Present Periglacial Environments 14.4 Aeolian Deposits in Present Periglacial Environments 14.5 Quaternary Aeolian Deposits 14.6 Synthesis 15 Periglacial Coasts 15.1 Introduction 15.2 The Nature of Periglacial Coasts 15.3 The Role of Ice in Shoreline Evolution 15.4 Ice-rich Permafrost Coasts 15.5 Thermokarst Coasts 15.6 Barrier Coasts 15.7 Salt Marshes and Tidal Flats 15.8 Rock Coasts 15.9 Raised and Inherited Shorelines 15.10 Lake Shorelines 15.11 Synthesis 16 Past Periglacial Environments 16.1 Introduction 16.2 Palaeoenvironmental Reconstruction Based on Periglacial Features 16.3 Past Periglacial Environments of the British Isles 16.4 Pre-Late Devensian Periglacial Features in the British Isles 16.5 The Dimlington Stade in the British Isles 16.6 The Younger Dryas (Loch Lomond) Stade in the British Isles 16.7 Past Periglacial Environments of the British Isles: Commentary 16.8 Late Weichselian Periglacial Environments in Continental Europe 16.9 Late Wisconsinan Periglacial Environments in North America 16.10 Permafrost Extent in the Northern Hemisphere During the Last Glacial Stage 16.11 Concluding Comments 17 Climate Change and Periglacial Environments 17.1 Introduction 17.2 Permafrost Degradation 17.3 Geomorphological Implications of Climate Change in the Circumpolar North 17.4Geomorphological Implications of Climate Change in High Mountain Environments 17.5 Climate Change ,Permafrost Degradation and Greenhouse Gas Emissions 17.6 Conclusion Appendix: Text Abbreviations, Units and Symbols Employed in Equations References Index

Language: English

Keywords: Lehrbuch

URL: https://www.gbv.de/dms/tib-ub-hannover/896726363.pdf

UID:

Format: 718 Seiten , Graphiken

ISBN: 978-3-11-025551-5

Series Statement: Handbooks of Communication Science; 17

Content: This handbooks series aims to integrate knowledge of communication structures and processes. It is global in orientation, dedicated to cultural and epistemological diversity as well as different scholarly approaches. The series features volumes on 'messages, codes and channels', 'mode of address: communication situations and context', 'methodology in communication science' and 'application areas'. The latter features volumes devoted to a large range of specialist areas of communication science. The series as a whole aims at meeting the needs of undergraduates, postgraduates, academics and researchers across the area of communication studies.

Additional Edition: Erscheint auch als

Language: English

UID:

Format: xiii, 562 Seiten , Illustrationen, Karten , 24 cm

ISBN: 978-3-319-46423-7

Series Statement: Advances in polar ecology 2

Content: This book focuses in detail on all ecologically important aspects of the Kongsfjorden system such as the marine and atmospheric environment including long-term monitoring, Ecophysiology of individual species, structure and function of the ecosystem, ecological processes and biological communities. The contributed articles include review articles and research articles that have a wider approach and bring the current research up-to-date. This book will form a baseline for future work.

Note: Contents: 1 The ecosystem of Kongsfjorden, Svalbard / Haakon Hop and Christian Wiencke Part I. Atmospheric conditions 2 The atmosphere above Ny-Ålesund : climate and global warming, ozone and surface UV radiation / Marion Maturilli, Inger Hanssen-Bauer, Roland Neuber, Markus Rex, and Kåre Edvardsen Part II. Oceanography, sea ice and underwater light regime 3 The Kongsfjorden Transect : seasonal and inter-annual variability in hydrography / Vigdis Tverberg, Ragnheid Skogseth, Finlo Cottier, Arild Sundfjord, Waldemar Walczowski, Mark E. Inall, Eva Falck, Olga Pavlova, and Frank Nilsen 4 Changes in sea-ice extent and thickness in Kongsfjorden, Svalbard (2003-2016) / Olga Pavlova, Sebastian Gerland, and Haakon Hop 5 The underwater light climate in Kongsfjorden and its ecological implications / Alexey K. Pavlov, Eva Leu, Dieter Hanelt, Inka Bartsch, Ulf Karsten, Stephen R. Hudson, Jean-Charles Gallet, Finlo Cottier, Jonathan H. Cohen, Jørgen Berge, Geir Johnsen, Marion Maturilli, Piotr Kowalczuk, Sławomir Sagan, Justyna Meler, and Mats A. Granskog Part III. Pelagic production, phytoplankton and zooplankton 6 Phytoplankton seasonal dynamics in Kongsfjorden, Svalbard and the adjacent shelf / Else N. Hegseth, Philipp Assmy, Józef M. Wiktor, Józef Wiktor Jr., Svein Kristiansen, Eva Leu, Vigdis Tverberg, Tove M. Gabrielsen, Ragnheid Skogseth, and Finlo Cottier 7 Zooplankton in Kongsfjorden (1996-2016) in relation to climate change / Haakon Hop, Anette Wold, Mikko Vihtakari, Malin Daase, Slawomir Kwasniewski, Marta Gluchowska, Silke Lischka, Friedrich Buchholz and Stig Falk-Petersen Part IV. Benthic microbes, macroalgae and fauna 8 Living on cold substrata : new insights and approaches in the study of microphytobenthos ecophysiology and ecology in Kongsfjorden / Ulf Karsten, Iris Schaub, Jana Woelfel, Duygu S. Sevilgen, Carolin Schlie, Burkhard Becker, Angela Wulff, Martin Graeve, and Heiko Wagner 9 Biodiversity of benthic macro- and microalgae from Svalbard with special focus on Kongsfjorden / Stein Fredriksen, Ulf Karsten, Inka Bartsch, Jana Woelfel, Miriam Koblowsky, Rhena Schumann, Siri Røang Moy, Robert S. Steneck, Józef M. Wiktor, Haakon Hop, and Christian Wiencke 10. Kelps and environmental changes in Kongsfjorden : Stress perception and responses / Kai Bischof, Christian Buschbaum, Stein Frederiksen, Francisco J. L. Gordillo, Sandra Heinrich, Carlos Jiménez, Cornelius Lütz, Markus Molis, Michael Y. Roleda, Max Schwanitz, and Christian Wiencke 11. Ecological drivers of and responses by Arctic benthic communities, with an emphasis on Kongsfjorden, Svalbard / Markus Molis, Frank Beuchel, Jürgen Laudien, Maria Włodarska-Kowalczuk, and Christian Buschbaum Part V. Arctic fjord ecosystem model and autonomous marine observatories. 12. Outline of an Arctic fjord ecosystem model for Kongsfjorden-Krossfjorden, Svalbard / Pedro Duarte, Jan Marcin Weslawski, and Haakon Hop 13. Autonomous marine observatories in Kongsfjorden, Svalbard / Haakon Hop, Finlo Cottier, and Jørgen Berge Part VI. Kongsfjorden as harbinger of the future Arctic 14. Kongsfjorden as harbinger of the future Arctic : knowns, unknowns and research priorities / Kai Bischof, Peter Convey, Pedro Duarte, Jean-Pierre Gattuso, Maria Granberg, Haakon Hop, Clara Hoppe, Carlos Jiménez, Leonid Lisitsyn, Brezo Martinez, Michael Y. Roleda, Peter Thor, Józef M. Wiktor, and Geir Wing Gabrielsen

Additional Edition: Erscheint auch als E-book The ecosystem of Kongsfjorden, Svalbard

Language: English

Keywords: Aufsatzsammlung

URL: Ebook (access only within the AWI network)

UID:

Format: 168 Seiten , Diagramme

ISBN: 9789264260092

Note: Contents: Foreword and acknowledgements ; Executive summary ; Reader's guide ; Effective carbon rates in OECD and selected partner economies ; Country results ; Annexes

Language: English

UID:

Format: 312 Seiten , Diagramme

ISBN: 9783867746120

Language: English

UID:

Format: x, 352 Seiten , Illustrationen

ISBN: 978-1-4757-2292-5

Content: Frozen Ground Engineering first introduces the reader to the frozen environment and the behavior of frozen soil as an engineering material. In subsequent chapters this information is used in the analysis and design of ground support systems, foundations, and embankments. These and other topics make this book suitable for use by civil engineering students in a one-semester course on frozen ground engineering at the senior or first-year-graduate level. Students are assumed to have a working knowledge of undergraduate mechanics (statics and mechanics of materials) and geotechnical engineering (usual two-course sequence). A knowledge of basic geology would be helpful but is not essential. This book will also be useful to advanced students in other disciplines and to engineers who desire an introduction to frozen ground engineering or references to selected technical publications in the field. BACKGROUND Frozen ground engineering has developed rapidly in the past several decades under the pressure of necessity. As practical problems involving frozen soils broadened in scope, the inadequacy of earlier methods for coping became increasingly apparent. The application of ground freezing to geotechnical projects throughout the world continues to grow as significant advances have been made in ground freezing technology. Freezing is a useful and versatile technique for temporary earth support, groundwater control in difficult soil or rock strata, and the formation of subsurface containment barriers suitable for use in groundwater remediation projects.

Note: Contents PREFACE CHAPTER 1. FROZEN GROUND 1.1 Frozen ground support systems Frozen earth wall Design considerations 1.2 Seasonally and perennially frozen ground Cold regions: definition Subsurface temperatures Active layer, Permafrost 1.3 Terrain features in permafrost areas Ground ice features Patterned ground 1.4 Engineering considerations Freezing process Thawing of frozen ground Frost action Useful aspects of frozen ground Ice as a construction material Problems CHAPTER 2. PHYSICAL AND THERMAL PROPERTIES 2.1 Composition and structure of frozen ground Soil types Phase relationships Ice phase Particle size and size distribution Consistency of cohesive soils 2.2 Soil classification Unified soil classification system Frozen soil classification 2.3 Water-ice phase relationships Unfrozen water in frozen soil Effect of solutes on freezing 2.4 Soil frost action Frost action process Frost susceptibility of soils Frost-heave forces Freeze-thaw effects on permeability 2.5 Thermal properties Thermal conductivity Heat capacity Thermal diffusiuity Latent heat of fusion Thermal expansion (or contraction) Problems CHAPTER 3. HEAT FLOW IN SOILS 3.1 Heat transfer at the ground surface Climatic factors Freezing (or thawing) indices Surface n-factor 3.2 Seasonal ground freezing (or thawing) Frost depth Thawing of frozen soil Design implications 3.3 Temperature below cooled (or heated) areas Steady state heat flow Transient temperatures Periodic heat flow 3.4 Thermal analysis: frozen ground support systems Single freeze pipe Wall formation Multiple rows of freeze pipes Problems CHAPTER 4. THAW BEHAVIOR OF FROZEN GROUND 4.1 Thaw settlement 4.2 Consolidation of thawing soils Thaw consolidation Residual stress in thawing soils 4.3 Thaw-consolidation in some layered systems Two layer soil problems Compressible soil ouer discrete ice layers Problems CHAPTER 5. MECHANICAL PROPERTIES OF FROZEN SOILS 5.1 Stress-strain-time and strength behavior Hydrostatic pressure effect on frozen soil behavior Shear stress effect on frozen soil behavior 5.2 Factors influencing creep and strength Creep of frozen soil under constant stress Stress-strain behavior under constant strain rate Ice content effect on strength Normal pressure effect on strength Strain rate effect on strength Temperature effect on strength Frozen soil behauior at cryogenic temperatures 5.3 Analytical representation of creep and strength data General creep equation Strength of frozen soils Comparison with Vyalou's creep and strength equations Normal pressure effect on creep and strength Salinity effect on frozen soil creep and strength 5.4 Frozen soil behavior in uniaxial tension 5.5 Deformability of frozen soils 5.6 Compressibility of frozen soils Problems CHAPTER 6. CONSTRUCTION GROUND FREEZING 6.1 Design considerations Ground freezing applications Soil conditions Groundwater flow Ground movement 6.2 Freezing methods and system installation Primary plant and pumped loop secondary coolant Expendable liquid refrigerant Installation of the cooling system 6.3 Structural design of frozen earth walls Curved walls Straight walls and combinations Tunnels Finite-element method 6.4 Monitoring requirements Freeze hole deviation Temperature Frost boundary location and wall thickness 6.5 Other construction considerations Protection of exposed frozen earth Concrete placement against frozen earth Problems CHAPTER 7. FOUNDATIONS IN FROZEN SOILS 7.1 General considerations Foundations in seasonally frozen ground Foundations in permafrost 7.2 Shallow foundations Selection of foundation method Design of shallow foundations Bearing capacity Settlement considerations 7.3 Pile foundations Pile types Pile placement Pile freezeback Axially loaded piles Laterally loaded piles Anchors in frozen ground 7.4 Frost-heave forces on foundations Tangential forces on a vertical surface Design for frost heave Problems CHAPTER 8. STABILITY OF SOIL MASSES IN COLD REGIONS 8.1 Landslides in permafrost: classification 8.2 Slopes in thawing permafrost Low-angle planar flows Slides 8.3 Slopes in frozen soils 8.4 Slope stabilization methods Construction and design techniques Stabilization of planar slides Stabilization of cut slopes Problems CHAPTER 9. EARTHWORK IN COLD REGIONS 9.1 Site considerations Drainage Thermal and frost action factors Subsurface conditions Material sources 9.2 Excavation and transport Mechanical excavation Drilling and blasting Thawing frozen soil Hydraulic dredging 9.3 Field placement Compaction Placement in water 9.4 Water-retaining embankments on permafrost Unfrozen embankments Frozen embankments Maintaining the frozen state Thermal and stability considerations 9.5 Embankment performance Frost heave Settlement Stability Artificial islands CHAPTER 10. FIELD INVESTIGATIONS 10.1. Sampling frozen ground Sampling methods Sample protection 10.2 Ground-temperature measurement Temperature sensors and measuring equipment 10.3 Field testing of frozen soils Field test methods Pressuremeter test Deep static cone penetration test Other types of field tests 10.4 Geophysical methods Seismic velocities in frozen ground Electrical properties of frozen ground Geophysical techniques used in frozen ground High-frequency electrical methods Borehole logging in permafrost APPENDIX A. SYMBOLS APPENDIX B. SI UNITS APPENDIX C LABORATORY AND FIELD TESTS ON FROZEN SOILS C1 Handling, storage, and machining of specimens prior to testing C2 Uniaxial compression test C3 Uniaxial tensile test C.4 Salinity of soil pore water C5 Thermosiphon C6 Pile load test in permafrost REFERENCES AUTHOR INDEX SUBJECT INDEX

Language: English

Keywords: Einführung

UID:

Format: 436 Seiten

Edition: ausführlich überarbeitete und aktualisierte 3. Auflage [für TYPO03 v9 LTS]

ISBN: 979-864343596-9

Language: English