Principles of Glacier Mechanics / Edition 1

Principles of Glacier Mechanics / Edition 1

by Roger L. Hooke
     
 

ISBN-10: 0132433125

ISBN-13: 9780132433129

Pub. Date: 08/28/1998

Publisher: Prentice Hall Professional Technical Reference

This new edition of a successful textbook will supply advanced undergraduate and graduate students with the tools they need to understand modern glaciology. Practicing glacial geologists and glaciologists will also find the volume useful as a reference book. Relatively simple concepts are followed by more mathematically advanced chapters. Student exercises are

Overview

This new edition of a successful textbook will supply advanced undergraduate and graduate students with the tools they need to understand modern glaciology. Practicing glacial geologists and glaciologists will also find the volume useful as a reference book. Relatively simple concepts are followed by more mathematically advanced chapters. Student exercises are included.

Product Details

ISBN-13:
9780132433129
Publisher:
Prentice Hall Professional Technical Reference
Publication date:
08/28/1998
Edition description:
Older Edition
Pages:
400
Product dimensions:
7.14(w) x 9.56(h) x 0.64(d)

Table of Contents

Preface vii
Chapter 1: Why Study Glaciers?
1(3)
Chapter 2: Some Basic Concepts
4(9)
A Note on Units
4(1)
Glacier Size, Shape, and Temperature
4(2)
The Condition of Incompressibility
6(2)
Stresses and Strain Rates
8(5)
Chapter 3: Mass Balance
13(14)
The Transformation of Snow to Ice
13(2)
Snow Stratigraphy
15(3)
Mass-Balance Principles
18(1)
Causes of Mass-Balance Fluctuations
19(3)
The Budget Gradient
22(2)
Effect of Weather Patterns on Mass-Balance Fluctuations
24(2)
Summary
26(1)
Chapter 4: Flow of a Crystalline Material
27(19)
Crystal Structure of Ice
27(1)
Dislocations
28(4)
Rate-Limiting Processes
32(3)
Internal Stresses
35(1)
Recrystallization
36(2)
Deformation Mechanism Maps
38(3)
A Flow Law for Glacier Ice
41(3)
Summary
44(2)
Chapter 5: The Velocity Field in a Glacier
46(19)
Balance Velocity
47(1)
Shear-Stress Distribution
47(1)
Horizontal Velocity at Depth in an Ice Sheet
48(2)
Horizontal Velocity in a Valley Glacier
50(3)
Mean Velocity and Ice Flux
53(1)
Vertical Velocity
54(1)
Submergence and Emergence Velocities
55(1)
Flow Field
56(1)
Transverse Profiles of Surface Elevation on a Valley Glacier
56(2)
Effect of Drifting Snow on the Velocity Field
58(3)
Inhomogeneities in the Flow Field in Large Ice Sheets: Ice Streams
61(3)
Summary
64(1)
Chapter 6: Temperature Distribution in Polar Ice Sheets
65(27)
Energy Balance in an Ice Sheet
65(4)
Dependence of k on Temperature
69(1)
The Steady-State Temperature Profile at the Center of an Ice Sheet
70(7)
Temperature Profiles in the Ablation Zone
77(1)
Temperature Profiles Near the Surface of an Ice Sheet
77(2)
Temperature Distributions Far from a Divide
79(3)
Basal Temperatures in Antarctica: Comparison of Solutions Using the Column and Flowline Models
82(6)
Englacial and Basal Temperatures Along a Flowline Using the Column Model
88(2)
Geomorphic Implications
90(1)
Summary
90(2)
Chapter 7: The Coupling Between a Glacier and Its Bed
92(27)
Sliding
92(14)
Deformation of Subglacial Till
106(1)
Ploughing and Decoupling
116(1)
Summary
117(2)
Chapter 8: Water Flow in and under Glaciers: Geomorphic Implications
119(33)
The Upper Part of the Englacial Hydraulic System
119(3)
Equipotential Surfaces in a Glacier
122(3)
Melt Rates in Conduits
125(2)
Water Pressures in Englacial and Subglacial Conduits
127(5)
Shapes of Subglacial Conduits
132(2)
The Linked-Cavity Drainage System
134(2)
Transitions Between Conduit and Linked-Cavity Systems
136(2)
Multibranched Aborescent System of Individually Braided Conduits
138(1)
Surges
139(1)
Subglacial Conduits on Deforming Till
140(2)
Subglacial Drainage Paths and the Formation of Eskers
142(6)
Water Pressure Fluctuations and Glacier Quarrying
148(1)
Origin of Cirques and Overdeepenings
149(1)
Summary
150(2)
Chapter 9: Stress and Deformation
152(15)
Stress
152(7)
Stress Equilibrium
159(1)
Deformation
159(5)
Condition that Principal Axes of Stress and Strain Rate Coincide
164(1)
Summary
165(2)
Chapter 10: Stress and Velocity Distribution in an Idealized Glacier
167(14)
Solutions for Stresses and Velocities in Plane Strain
167(2)
Comparison with Real Glaciers
179(1)
Summary
180(1)
Chapter 11: Applications of Stress and Deformation Principles to Classical Problems
181(28)
Collapse of a Cylindrical Hole
181(10)
Calculating Basal Shear Stresses Using a Force Balance
191(5)
Creep of Floating Ice Shelves
196(4)
Analysis of Borehole-Deformation Data
200(8)
Summary
208(1)
Chapter 12: Response of Glaciers to Changes in Mass Balance
209(20)
Positive Feedback Processes
209(1)
Response of a Temperate Glacier
210(1)
Elementary Kinematic Wave Theory
211(3)
Analysis of the Effect of a Small Change in Mass Balance Using a Perturbation Approach
214(3)
Effect of Diffusion
217(1)
The Problem at the Terminus
217(1)
Further Study of the Response Time
218(3)
Numerical Modeling of Glacier Responses
221(1)
Comparison with Observation
221(6)
Summary
227(2)
Appendix: Problems 229(7)
References 236(8)
Index 244

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