ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Keywords: Geology. ; Climatology. ; Environment. ; Physical geography. ; Geology. ; Climate Sciences. ; Environmental Sciences. ; Physical Geography.
    Description / Table of Contents: Flow of ice -- Thermal structure -- Basal processes -- Tidewater glaciers -- Ice shelves D ocean interaction -- Polar meteorology -- Mass balance -- Numerical methods -- Inverse modeling -- Analytic ice sheet models and climate change -- Firn -- Ice cores -- Remote sensing -- Geophysics -- Geodynamics -- Paleo-ice sheets -- Geomorphology -- Glacier fluctuations -- Tropical glaciers -- Historical glaciology.
    Abstract: Our realisation of how profoundly glaciers and ice sheets respond to climate change and impact sea level and the environment has propelled their study to the forefront of Earth system science. Aspects of this multidisciplinary endeavour now constitute major areas of research. This book is named after the international summer school held annually in the beautiful alpine village of Karthaus, Northern Italy, and consists of twenty chapters based on lectures from the school. They cover theory, methods, and observations, and introduce readers to essential glaciological topics such as ice-flow dynamics, polar meteorology, mass balance, ice-core analysis, paleoclimatology, remote sensing and geophysical methods, glacial isostatic adjustment, modern and past glacial fluctuations, and ice sheet reconstruction. The chapters were written by thirty-four contributing authors who are leading international authorities in their fields. The book can be used as a graduate-level textbook for a university course, and as a valuable reference guide for practising glaciologists and climate scientists.
    Type of Medium: Online Resource
    Pages: XXVII, 530 p. 283 illus., 214 illus. in color. , online resource.
    Edition: 1st ed. 2021.
    ISBN: 9783030425845
    Series Statement: Springer Textbooks in Earth Sciences, Geography and Environment,
    DDC: 551
    Language: English
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Call number: PIK N 454-22-94702
    Description / Table of Contents: Our realisation of how profoundly glaciers and ice sheets respond to climate change and impact sea level and the environment has propelled their study to the forefront of Earth system science. Aspects of this multidisciplinary endeavour now constitute major areas of research. This book is named after the international summer school held annually in the beautiful alpine village of Karthaus, Northern Italy, and consists of twenty chapters based on lectures from the school. They cover theory, methods, and observations, and introduce readers to essential glaciological topics such as ice-flow dynamics, polar meteorology, mass balance, ice-core analysis, paleoclimatology, remote sensing and geophysical methods, glacial isostatic adjustment, modern and past glacial fluctuations, and ice sheet reconstruction. The chapters were written by thirty-four contributing authors who are leading international authorities in their fields. The book can be used as a graduate-level textbook for a university course, and as a valuable reference guide for practising glaciologists and climate scientists.
    Type of Medium: Monograph available for loan
    Pages: xxvii, 530 Seiten , Illustrationen, Diagramme
    ISBN: 978-3-030-42582-1 , 9783030425821
    ISSN: 2510-1307 , 2510-1315
    Series Statement: Springer Textbooks in Earth Sciences, Geography and Environment
    Language: English
    Note: Contents 1 Slow Viscous Flow 1.1 Introduction 1.2 Coordinate Systems and the Material Derivative 1.2.1 Eulerian and Lagrangian Coordinates 1.2.2 The Material Derivative 1.3 Mass Conservation 1.4 The Stress Tensor and Momentum Conservation 1.4.1 The Stress Tensor 1.4.2 Momentum Conservation 1.4.3 Rheology 1.4.4 The Navier-Stokes Equations 1.4.5 Stokes Flow 1.5 Boundary Conditions 1.5.1 The No-Slip Condition and the Sliding Law 1.5.2 Dynamic Boundary Conditions 1.5.3 Kinematic Boundary Conditions 1.6 Temperature and Energy Conservation 1.7 Glacier and Ice Sheet Flow 1.8 Examples 1.8.1 Uniform Flow on a Slope 1.8.2 Spreading Flow at an Ice Divide 1.8.3 Small-Amplitude Perturbations 1.9 The Shallow Ice Approximation 1.10 Conclusions and Outlook 1.11 Appendix: Non-dimensionalisation Exercises 2 Thermal Structure 2.1 Temperature Profiles 2.2 Boundary Conditions 2.2.1 The Thermal Near-Surface Wave 2.3 Models: Simple to Complicated 2.4 Basal Conditions 2.4.1 Polythermal Ice 2.5 Modelling Issues 2.5.1 Non-dimensionalisation 2.5.2 Thermomechanical Coupling 2.5.3 Thermal Runaway Exercises 3 Sliding, Drainage and Subglacial Geomorphology 3.1 Introduction 3.2 Sliding Over Hard Beds 3.2.1 Weertman Sliding 3.2.2 Nye-Kamb Theory 3.2.3 Sub-temperate Sliding 3.2.4 Nonlinear Sliding Laws 3.2.5 Cavitation 3.2.6 Comparison with Experiment 3.3 Subglacial Drainage Theory 3.3.1 Weertman Films 3.3.2 Röthlisberger Channels (or ‘R-Channels’) 3.3.3 Jökulhlaups 3.3.4 Subglacial Lakes 3.3.5 Linked Cavities 3.3.6 Drainage Transitions and Glacier Surges 3.3.7 Ongoing Developments 3.4 Basal Processes and Geomorphology 3.4.1 Soft Glacier Beds 3.4.2 Drainage Over Till 3.4.3 Geomorphological Processes Exercises 4 Tidewater Glaciers 4.1 Introduction 4.2 Calving 4.3 Tidewater Glacier Dynamics 4.3.1 Tidewater Glacier Retreat and Instability 4.3.2 Tidewater Glacier Advance 4.3.3 Flow Variability of Tidewater Glaciers 4.4 The Link to Climate: Triggers for Retreat 4.4.1 Ice Shelf Collapse and Backstress 4.4.2 Grounded Calving Fronts 4.5 Outlook 5 Interaction of Ice Shelves with the Ocean 5.1 Introduction 5.2 Impact of Melting Ice on the Ocean 5.3 Processes at the Ice-Ocean Interface 5.4 Buoyancy-Driven Flow on Geophysical Scales 5.5 Sensitivity to Ocean Temperature 5.6 Impact of Meltwater Outflow at the Grounding Line 5.7 Fundamentals of the Three-Dimensional Ocean Circulation 5.8 Some Properties and Limitations of the Geostrophic Equations 5.9 Effects of Stratification 5.10 Three-Dimensional Circulation in Sub-Ice-Shelf Cavities Exercises 6 Polar Meteorology 6.1 Introduction 6.2 Shortwave and Longwave Radiation 6.3 Radiation Climate at the Top of the Atmosphere 6.4 Large Scale Circulation 6.5 Surface Energy Balance 6.5.1 Shortwave Radiation 6.5.2 Surface Albedo 6.5.3 Longwave Radiation 6.5.4 Turbulent Fluxes 6.6 Temperature Inversion and Katabatic Winds 6.6.1 Surface Temperature Inversion and Deficit 6.6.2 Katabatic Winds 6.7 Precipitation 6.8 Notes and References Exercises 7 Mass Balance 7.1 Introduction 7.2 Definitions 7.3 Methods 7.3.1 In Situ Observations 7.3.2 Satellite/Airborne Altimetry 7.3.3 Satellite Gravimetry 7.3.4 Mass Budget Method 7.4 Valley Glaciers and Ice Caps 7.4.1 In Situ Observations 7.4.2 Modelling 7.4.3 Dynamical Response 7.4.4 Remote Sensing 7.5 Antarctic Ice Sheet 7.5.1 Spatial SSMB Variability 7.5.2 Blue Ice Areas 7.5.3 Temporal SSMB Variability 7.6 Greenland Ice Sheet 7.6.1 Spatial SSMB Variability 7.6.2 Temporal SSMB Variability 7.6.3 Role of the Liquid Water Balance 8 Numerical Modelling of Ice Sheets, Streams, and Shelves 8.1 Introduction 8.2 Ice Flow Equations 8.2.1 The Shallow Ice Approximation 8.2.2 Analogy with the Heat Equation 8.3 Finite Difference Numerics 8.3.1 Explicit Scheme for the Heat Equation 8.3.2 A First Implemented Scheme 8.3.3 Stability Criteria and Adaptive Time Stepping 8.3.4 Implicit Schemes 8.3.5 Numerical Solution of Diffusion Equations 8.4 Numerically Solving the SIA 8.5 Exact Solutions and Verification 8.5.1 Exact Solution of the Heat Equation 8.5.2 Halfar’s Exact Similarity Solution to the SIA 8.5.3 Using Halfar’s Solution 8.5.4 A Test of Robustness 8.6 Applying Our Numerical Ice Sheet Model 8.7 Shelves and Streams 8.7.1 The Shallow Shelf Approximation (SSA) 8.7.2 Numerical Solution of the SSA 8.7.3 Numerics of the Linear Boundary Value Problem 8.7.4 Solving the Stress Balance for an Ice Shelf 8.7.5 Realistic Ice Shelf Modelling 8.8 A Summary of Numerical Ice Flow Modelling 8.9 Notes Exercises 9 Least-Squares Data Inversion in Glaciology 9.1 Preamble 9.2 Introduction 9.3 The Roots of GPS in Glaciology 9.4 Introduction to GPS 9.4.1 History 9.4.2 Coarse Acquisition (C/A) Code 9.5 The Equations of Pseudorange 9.6 Least-Squares Solution of an Overdetermined System of Linear Equations 9.7 Observational Techniques to Improve GPS Accuracy 9.7.1 The Ionosphere-Free Combination 9.7.2 Carrier-Phase Determined Range and Integer Wavelength Ambiguity 9.7.3 Resolving Range Ambiguity by Phase Tracking 9.7.4 Differential GPS Exercises 10 Analytical Models of Ice Sheets and Ice Shelves 10.1 Introduction 10.2 Perfectly-Plastic Ice Sheet Model 10.3 The Height–Mass Balance Feedback 10.4 Ice-Sheet Profile for Plane Shear with Glen’s Law 10.5 Ice Shelves Exercise 11 Firn 11.1 Introduction 11.2 Firn Densification 11.2.1 Mechanisms of Firn Densification 11.2.2 Firn Densification Models 11.2.3 Firn Layering and Microstructure 11.3 Applications of Firn Models 11.3.1 Ice Sheet Surface Mass Balance from Altimetry 11.3.2 Delta Age Calculations in Deep Ice Cores 11.4 Summary and Conclusions 12 Ice Cores: Archive of the Climate System 12.1 Introduction 12.2 Dating Ice Cores 12.3 Stable Water Isotopes 12.3.1 Basics and Nomenclature 12.3.2 The Isotope Proxy Thermometer 12.3.3 Examples of Isotope Records 12.3.4 Isotope Diffusion in Firn and Ice 12.3.5 Diffusion Thermometry 12.4 Aerosols in Ice 12.4.1 Introduction and Origin of Aerosols in Ice 12.4.2 Aerosol Sources and Transport 12.4.3 Post-depositional Modification 12.4.4 Seasonal Cycles in Aerosol and Particle Constituents in Ice 12.4.5 The Volcanic Signal in Ice and Its Use for Chronological Control 12.4.6 Marine Biogenic MSA and Sea Salt as Sea-Ice Proxies 12.4.7 The Record of Anthropogenic Pollution 12.4.8 Long Aerosol Records from Greenland and Antarctica 12.4.9 Electrical Properties of Ice and Their Relationship to Chemistry 12.5 Gases Enclosed in Ice 12.5.1 Firn Gas and Gas Occlusion 12.5.2 Trace Gases 12.6 Timing of Climate Events Exercises 13 Satellite Remote Sensing of Glaciers and Ice Sheets 13.1 Introduction 13.2 Optical Sensors and Applications 13.2.1 Sensors and Satellites 13.2.2 Applications 13.3 SAR Methods and Applications 13.3.1 Radar Signal Interaction with Snow and Ice 13.3.2 SAR Sensor and Image Characteristics 13.3.3 InSAR Measurement Principles and Applications 13.4 Satellite Altimetry 13.4.1 Altimetry Missions 13.4.2 Measuring Elevation Change 14 Geophysics 14.1 Geophysical Methods: Overview 14.2 Passive Methods 14.2.1 Gravimetry 14.2.2 Magnetics 14.2.3 Seismology 14.3 Active Methods: Basics 14.3.1 Propagation Properties and Reflection Origin 14.3.2 Seismic System Set-Up 14.3.3 Radar System Set-Up 14.4 Data Acquisition and Processing 14.5 Seismic Applications in Ice 14.5.1 Ice Thickness and Basal Topography 14.5.2 Subglacial Structure and Properties 14.5.3 Rheological and Other Englacial Properties 14.6 Radar Applications in Ice 14.6.1 Internal Layer Architecture and Ice Dynamics 14.6.2 Subglacial Conditions 14.6.3 Englacial Conditions 14.7 Notes and References 14.7.1 Further Reading 14.7.2 Gravimetry 14.7.3 General Wave Equation and Solution 14.7.4 Seismic Waves 14.7.5 Electromagnetic Waves Exercises 15 Glacial Isostatic Adjustment 15.1 Introduction 15.2 Earth Response to Loading 15.2.1 Rheology of the Earth 15.2.2 Building an Earth Model 15.2.3 Earth Models Used in Glaciology and Glacial Isostatic Adjustment 15.3 The Cryosphere and Sea Level 15.3.1 Factors Affecting Sea-Level Change 15.3.2 Eu
    Location: A 18 - must be ordered
    Branch Library: PIK Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Call number: 9783030425845 (e-book)
    Description / Table of Contents: Our realisation of how profoundly glaciers and ice sheets respond to climate change and impact sea level and the environment has propelled their study to the forefront of Earth system science. Aspects of this multidisciplinary endeavour now constitute major areas of research. This book is named after the international summer school held annually in the beautiful alpine village of Karthaus, Northern Italy, and consists of twenty chapters based on lectures from the school. They cover theory, methods, and observations, and introduce readers to essential glaciological topics such as ice-flow dynamics, polar meteorology, mass balance, ice-core analysis, paleoclimatology, remote sensing and geophysical methods, glacial isostatic adjustment, modern and past glacial fluctuations, and ice sheet reconstruction. The chapters were written by thirty-four contributing authors who are leading international authorities in their fields. The book can be used as a graduate-level textbook for a university course, and as a valuable reference guide for practising glaciologists and climate scientists.
    Type of Medium: 12
    Pages: 1 Online-Ressource (XXVII, 530 Seiten) , Illustrationen
    ISBN: 9783030425845 , 978-3-030-42584-5
    ISSN: 2510-1307 , 2510-1315
    Series Statement: Springer Textbooks in Earth Sciences, Geography and Environment
    Language: English
    Note: Contents 1 Slow Viscous Flow 1.1 Introduction 1.2 Coordinate Systems and the Material Derivative 1.2.1 Eulerian and Lagrangian Coordinates 1.2.2 The Material Derivative 1.3 Mass Conservation 1.4 The Stress Tensor and Momentum Conservation 1.4.1 The Stress Tensor 1.4.2 Momentum Conservation 1.4.3 Rheology 1.4.4 The Navier-Stokes Equations 1.4.5 Stokes Flow 1.5 Boundary Conditions 1.5.1 The No-Slip Condition and the Sliding Law 1.5.2 Dynamic Boundary Conditions 1.5.3 Kinematic Boundary Conditions 1.6 Temperature and Energy Conservation 1.7 Glacier and Ice Sheet Flow 1.8 Examples 1.8.1 Uniform Flow on a Slope 1.8.2 Spreading Flow at an Ice Divide 1.8.3 Small-Amplitude Perturbations 1.9 The Shallow Ice Approximation 1.10 Conclusions and Outlook 1.11 Appendix: Non-dimensionalisation Exercises 2 Thermal Structure 2.1 Temperature Profiles 2.2 Boundary Conditions 2.2.1 The Thermal Near-Surface Wave 2.3 Models: Simple to Complicated 2.4 Basal Conditions 2.4.1 Polythermal Ice 2.5 Modelling Issues 2.5.1 Non-dimensionalisation 2.5.2 Thermomechanical Coupling 2.5.3 Thermal Runaway Exercises 3 Sliding, Drainage and Subglacial Geomorphology 3.1 Introduction 3.2 Sliding Over Hard Beds 3.2.1 Weertman Sliding 3.2.2 Nye-Kamb Theory 3.2.3 Sub-temperate Sliding 3.2.4 Nonlinear Sliding Laws 3.2.5 Cavitation 3.2.6 Comparison with Experiment 3.3 Subglacial Drainage Theory 3.3.1 Weertman Films 3.3.2 Röthlisberger Channels (or ‘R-Channels’) 3.3.3 Jökulhlaups 3.3.4 Subglacial Lakes 3.3.5 Linked Cavities 3.3.6 Drainage Transitions and Glacier Surges 3.3.7 Ongoing Developments 3.4 Basal Processes and Geomorphology 3.4.1 Soft Glacier Beds 3.4.2 Drainage Over Till 3.4.3 Geomorphological Processes Exercises 4 Tidewater Glaciers 4.1 Introduction 4.2 Calving 4.3 Tidewater Glacier Dynamics 4.3.1 Tidewater Glacier Retreat and Instability 4.3.2 Tidewater Glacier Advance 4.3.3 Flow Variability of Tidewater Glaciers 4.4 The Link to Climate: Triggers for Retreat 4.4.1 Ice Shelf Collapse and Backstress 4.4.2 Grounded Calving Fronts 4.5 Outlook 5 Interaction of Ice Shelves with the Ocean 5.1 Introduction 5.2 Impact of Melting Ice on the Ocean 5.3 Processes at the Ice-Ocean Interface 5.4 Buoyancy-Driven Flow on Geophysical Scales 5.5 Sensitivity to Ocean Temperature 5.6 Impact of Meltwater Outflow at the Grounding Line 5.7 Fundamentals of the Three-Dimensional Ocean Circulation 5.8 Some Properties and Limitations of the Geostrophic Equations 5.9 Effects of Stratification 5.10 Three-Dimensional Circulation in Sub-Ice-Shelf Cavities Exercises 6 Polar Meteorology 6.1 Introduction 6.2 Shortwave and Longwave Radiation 6.3 Radiation Climate at the Top of the Atmosphere 6.4 Large Scale Circulation 6.5 Surface Energy Balance 6.5.1 Shortwave Radiation 6.5.2 Surface Albedo 6.5.3 Longwave Radiation 6.5.4 Turbulent Fluxes 6.6 Temperature Inversion and Katabatic Winds 6.6.1 Surface Temperature Inversion and Deficit 6.6.2 Katabatic Winds 6.7 Precipitation 6.8 Notes and References Exercises 7 Mass Balance 7.1 Introduction 7.2 Definitions 7.3 Methods 7.3.1 In Situ Observations 7.3.2 Satellite/Airborne Altimetry 7.3.3 Satellite Gravimetry 7.3.4 Mass Budget Method 7.4 Valley Glaciers and Ice Caps 7.4.1 In Situ Observations 7.4.2 Modelling 7.4.3 Dynamical Response 7.4.4 Remote Sensing 7.5 Antarctic Ice Sheet 7.5.1 Spatial SSMB Variability 7.5.2 Blue Ice Areas 7.5.3 Temporal SSMB Variability 7.6 Greenland Ice Sheet 7.6.1 Spatial SSMB Variability 7.6.2 Temporal SSMB Variability 7.6.3 Role of the Liquid Water Balance 8 Numerical Modelling of Ice Sheets, Streams, and Shelves 8.1 Introduction 8.2 Ice Flow Equations 8.2.1 The Shallow Ice Approximation 8.2.2 Analogy with the Heat Equation 8.3 Finite Difference Numerics 8.3.1 Explicit Scheme for the Heat Equation 8.3.2 A First Implemented Scheme 8.3.3 Stability Criteria and Adaptive Time Stepping 8.3.4 Implicit Schemes 8.3.5 Numerical Solution of Diffusion Equations 8.4 Numerically Solving the SIA 8.5 Exact Solutions and Verification 8.5.1 Exact Solution of the Heat Equation 8.5.2 Halfar’s Exact Similarity Solution to the SIA 8.5.3 Using Halfar’s Solution 8.5.4 A Test of Robustness 8.6 Applying Our Numerical Ice Sheet Model 8.7 Shelves and Streams 8.7.1 The Shallow Shelf Approximation (SSA) 8.7.2 Numerical Solution of the SSA 8.7.3 Numerics of the Linear Boundary Value Problem 8.7.4 Solving the Stress Balance for an Ice Shelf 8.7.5 Realistic Ice Shelf Modelling 8.8 A Summary of Numerical Ice Flow Modelling 8.9 Notes Exercises 9 Least-Squares Data Inversion in Glaciology 9.1 Preamble 9.2 Introduction 9.3 The Roots of GPS in Glaciology 9.4 Introduction to GPS 9.4.1 History 9.4.2 Coarse Acquisition (C/A) Code 9.5 The Equations of Pseudorange 9.6 Least-Squares Solution of an Overdetermined System of Linear Equations 9.7 Observational Techniques to Improve GPS Accuracy 9.7.1 The Ionosphere-Free Combination 9.7.2 Carrier-Phase Determined Range and Integer Wavelength Ambiguity 9.7.3 Resolving Range Ambiguity by Phase Tracking 9.7.4 Differential GPS Exercises 10 Analytical Models of Ice Sheets and Ice Shelves 10.1 Introduction 10.2 Perfectly-Plastic Ice Sheet Model 10.3 The Height–Mass Balance Feedback 10.4 Ice-Sheet Profile for Plane Shear with Glen’s Law 10.5 Ice Shelves Exercise 11 Firn 11.1 Introduction 11.2 Firn Densification 11.2.1 Mechanisms of Firn Densification 11.2.2 Firn Densification Models 11.2.3 Firn Layering and Microstructure 11.3 Applications of Firn Models 11.3.1 Ice Sheet Surface Mass Balance from Altimetry 11.3.2 Delta Age Calculations in Deep Ice Cores 11.4 Summary and Conclusions 12 Ice Cores: Archive of the Climate System 12.1 Introduction 12.2 Dating Ice Cores 12.3 Stable Water Isotopes 12.3.1 Basics and Nomenclature 12.3.2 The Isotope Proxy Thermometer 12.3.3 Examples of Isotope Records 12.3.4 Isotope Diffusion in Firn and Ice 12.3.5 Diffusion Thermometry 12.4 Aerosols in Ice 12.4.1 Introduction and Origin of Aerosols in Ice 12.4.2 Aerosol Sources and Transport 12.4.3 Post-depositional Modification 12.4.4 Seasonal Cycles in Aerosol and Particle Constituents in Ice 12.4.5 The Volcanic Signal in Ice and Its Use for Chronological Control 12.4.6 Marine Biogenic MSA and Sea Salt as Sea-Ice Proxies 12.4.7 The Record of Anthropogenic Pollution 12.4.8 Long Aerosol Records from Greenland and Antarctica 12.4.9 Electrical Properties of Ice and Their Relationship to Chemistry 12.5 Gases Enclosed in Ice 12.5.1 Firn Gas and Gas Occlusion 12.5.2 Trace Gases 12.6 Timing of Climate Events Exercises 13 Satellite Remote Sensing of Glaciers and Ice Sheets 13.1 Introduction 13.2 Optical Sensors and Applications 13.2.1 Sensors and Satellites 13.2.2 Applications 13.3 SAR Methods and Applications 13.3.1 Radar Signal Interaction with Snow and Ice 13.3.2 SAR Sensor and Image Characteristics 13.3.3 InSAR Measurement Principles and Applications 13.4 Satellite Altimetry 13.4.1 Altimetry Missions 13.4.2 Measuring Elevation Change 14 Geophysics 14.1 Geophysical Methods: Overview 14.2 Passive Methods 14.2.1 Gravimetry 14.2.2 Magnetics 14.2.3 Seismology 14.3 Active Methods: Basics 14.3.1 Propagation Properties and Reflection Origin 14.3.2 Seismic System Set-Up 14.3.3 Radar System Set-Up 14.4 Data Acquisition and Processing 14.5 Seismic Applications in Ice 14.5.1 Ice Thickness and Basal Topography 14.5.2 Subglacial Structure and Properties 14.5.3 Rheological and Other Englacial Properties 14.6 Radar Applications in Ice 14.6.1 Internal Layer Architecture and Ice Dynamics 14.6.2 Subglacial Conditions 14.6.3 Englacial Conditions 14.7 Notes and References 14.7.1 Further Reading 14.7.2 Gravimetry 14.7.3 General Wave Equation and Solution 14.7.4 Seismic Waves 14.7.5 Electromagnetic Waves Exercises 15 Glacial Isostatic Adjustment 15.1 Introduction 15.2 Earth Response to Loading 15.2.1 Rheology of the Earth 15.2.2 Building an Earth Model 15.2.3 Earth Models Used in Glaciology and Glacial Isostatic Adjustment 15.3 The Cryosphere and Sea Level 15.3.1 Factors Affecting Sea-Level Change 15
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Ng, Felix S L (2015): Spatial complexity of ice flow across the Antarctic Ice Sheet. Nature Geoscience, 8(10), https://doi.org/10.1038/ngeo2532
    Publication Date: 2023-01-13
    Description: Fast-flowing ice streams discharge most of the ice from the interior of the Antarctic Ice Sheet coastward. Understanding how their tributary organisation is governed and evolves is essential for developing reliable models of the ice sheet's response to climate change. Despite much research on ice-stream mechanics, this problem is unsolved, because the complexity of flow within and across the tributary networks has hardly been interrogated. Here I present the first map of planimetric flow convergence across the ice sheet, calculated from satellite measurements of ice surface velocity, and use it to explore this complexity. The convergence map of Antarctica elucidates how ice-stream tributaries draw ice from the interior. It also reveals curvilinear zones of convergence along lateral shear margins of streaming, and abundant convergence ripples associated with nonlinear ice rheology and changes in bed topography and friction. Flow convergence on ice-stream tributaries and their feeding zones is markedly uneven, and interspersed with divergence at distances of the order of kilometres. For individual drainage basins as well as the ice sheet as a whole, the range of convergence and divergence decreases systematically with flow speed, implying that fast flow cannot converge or diverge as much as slow flow. I therefore deduce that flow in ice-stream networks is subject to mechanical regulation that limits flow-orthonormal strain rates. These properties and the gridded data of convergence and flow-orthonormal strain rate in this archive provide targets for ice- sheet simulations and motivate more research into the origin and dynamics of tributarization.
    Keywords: File content; File format; File name; File size; pan-Antarctica; Uniform resource locator/link to model result file
    Type: Dataset
    Format: text/tab-separated-values, 40 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2009-05-01
    Print ISSN: 0031-3203
    Electronic ISSN: 1873-5142
    Topics: Computer Science
    Published by Elsevier
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    facet.materialart.
    Unknown
    Cambridge University Press
    Publication Date: 2011-12-28
    Print ISSN: 0022-1430
    Electronic ISSN: 1727-5652
    Topics: Geography , Geosciences
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    facet.materialart.
    Unknown
    Cambridge University Press
    Publication Date: 2014-07-21
    Print ISSN: 0022-1430
    Electronic ISSN: 1727-5652
    Topics: Geography , Geosciences
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2013-11-13
    Print ISSN: 0022-1430
    Electronic ISSN: 1727-5652
    Topics: Geography , Geosciences
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2020-06-18
    Description: We identify and map chains of esker beads (series of aligned mounds) up to 15 m high and on average ∼ 65 m wide in central Nunavut, Canada, from the high-resolution (2 m) ArcticDEM. Based on the close 1 : 1 association with regularly spaced, sharp-crested ridges interpreted as De Geer moraines, we interpret the esker beads to be quasi-annual ice-marginal deposits formed time-transgressively at the mouth of subglacial conduits during deglaciation. Esker beads therefore preserve a high-resolution record of ice-margin retreat and subglacial hydrology. The well-organised beaded esker network implies that subglacial channelised drainage was relatively fixed in space and through time. Downstream esker bead spacing constrains the typical pace of deglaciation in central Nunavut between 8.1 and 6.8 cal kyr BP to 165–370 m yr−1, although with short periods of more rapid retreat (〉 400 m yr−1). Under our time-transgressive interpretation, the lateral spacing of the observed eskers provides a true measure of subglacial conduit spacing for testing mathematical models of subglacial hydrology. Esker beads also record the volume of sediment deposited from conduits in each melt season, thus providing a minimum bound on annual sediment fluxes, which is in the range of 103–104 m3 yr−1 in each 6–10 km wide subglacial conduit catchment. We suggest that the prevalence of esker beads across this predominantly marine-terminating sector of the Laurentide Ice Sheet is a result of sediment fluxes that were unable to backfill conduits at a rate faster than ice-margin retreat. Conversely, we hypothesise that esker ridges form when sediment backfilling of the subglacial conduit outpaced retreat, resulting in headward esker growth close to but behind the margin. The implication, in accordance with recent modelling results, is that eskers in general record a composite signature of ice-marginal drainage rather than a temporal snapshot of ice-sheet-wide subglacial drainage.
    Print ISSN: 1994-0416
    Electronic ISSN: 1994-0424
    Topics: Geography , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2010-11-01
    Print ISSN: 0277-3791
    Electronic ISSN: 1873-457X
    Topics: Geography , Geosciences
    Published by Elsevier
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...