Dynamics of Earth's Deep Interior and Earth Rotation

• Tongue: English
• Leaves: 194
• Category: Library

✦ Synopsis

About The Product

Published by the American Geophysical Union as part of the Geophysical Monograph Series.

The study of the Earth's deep interior is the object of a spectacular development due both to new techniques of observation (including very long baseline interferometry and superconducting gravimeters) and to progress in theory spurred by new computing capability. Stimulated by the international SEDI group, founded in 1986, geophysicists from different disciplines-Earth dynamicists, seismologists, geomagneticians, mineral physicists-began to cooperate and integmte more fully one another's work. SEDI meetings favor and promote those close contacts and cooperation. Great efforts will still be needed before all the disciplinary divisions dissolve-if they ever do-but things are clearly improving, as shown by this AGU monograph. We think indeed that this volume is a good, although incomplete, illustration of the situation as described above and that it is a benchmark in the exciting story of the progress in knowledge of the deep interior of our planet.

Content:

✦ Table of Contents

Geophysical Monograph Series......Page 1
Dynamics of Earth's Deep Interior and Earth Rotation......Page 5
CONTENTS......Page 7
PREFACE......Page 9
FOREWORD......Page 11
Introduction......Page 12
Outer Core Dynamics......Page 13
Excitation......Page 15
Influence of Flow Approximation on Gravity......Page 17
Detection of Core Modes in Gravity......Page 20
Wobble Resonances......Page 23
Conclusion......Page 24
References......Page 25
VLBI SYSTEMS AND SUPERCONDUCTING GRAVITY METERS......Page 28
A JOINT SEARCH FOR SHORT PERIOD POLAR MOTION USING VLBI AND SUPERGRAVIMETRY......Page 29
A SEARCH FOR SHORT PERIOD POLAR MOTION USING VLBI GROUP DELAY RESIDUALS......Page 31
REFERENCES......Page 34
INTRODUCTION......Page 36
OCEAN CORRECTIONS......Page 37
RESONANT TIDAL EXCITATION......Page 38
CONCLUSIONS......Page 39
REFERENCES......Page 40
TORQUES ON THE INNER CORE......Page 42
Recent Efforts......Page 43
REFERENCES......Page 44
INTRODUCTION......Page 45
NEW SPECTRAL ANALYSIS OF THE SUPERCONDUCTING GRAVIMETER DATA AFTER THE 1983 HINDU KUSHEARTHQUAKE......Page 46
OTHER ORIGIN OF THE PEAKS BETWEEN 13 AND 17.5 HRS......Page 48
REFERENCES......Page 54
THEORY......Page 55
VISCOELASTIC DEFORMATIONS DUE TO INTERNAL LOADS......Page 57
RESULTING PERTURBATION IN THE J2 GEOID COEFFICIENT......Page 58
REFERENCES......Page 59
INTRODUCTION......Page 60
THE POINCARE CORE MODEL......Page 61
k =1 Core Resonance......Page 62
k = 2 Core Resonance......Page 66
ELLIPTIC INSTABILITY......Page 68
DISCUSSION......Page 70
REFERENCES......Page 76
FORMULATION OF THE PROBLEM AND GOVERNING EQUATIONS......Page 78
RIGIDITY IN THE OUTER CORE = 0......Page 79
RIGIDITY IN THE OUTER CORE IS SMALL BUT NOT NEGLIGIBLE......Page 81
Zeroth-Order Approximation......Page 82
REFERENCES......Page 88
Long Period Equations and Boundary Conditions......Page 90
Numerical Implementation and Results......Page 93
Detection and Identification of Core Modes......Page 94
References......Page 97
Introduction......Page 99
Spectral Analysis and the Product Spectrum......Page 100
References......Page 104
INTRODUCTION......Page 105
TESTING FROZEN-FLUX AND TANGENTIAL GEOSTROPHY......Page 106
METHOD......Page 107
RESULTS......Page 108
CONCLUSIONS AND DISCUSSION......Page 114
REFERENCES......Page 115
INTRODUCTION......Page 116
DECADAL FLUCTUATIONS......Page 117
REFERENCES......Page 119
2. IMPLICATIONS OF DECADE FLUCTUATIONS IN THE LENGTH OF THE DAY FOR GEOMAGNETIC ESTIMATION OF CORE SURFACE FLOW......Page 120
3. THEORY: A SIMPLIFIED MEAN FIELD INDUCTION EQUATION......Page 121
5. EXPERIMENTAL METHOD......Page 122
Mapping Two Tradeoff Surfaces......Page 123
Flow Fields by the Core-Mantle Boundary......Page 124
Some Further Comments......Page 125
7. CONCLUSIONS: A FEW FINDINGS AT FINITE Rm*......Page 126
APPENDIX A......Page 127
APPENDIX C......Page 129
APPENDIX D......Page 130
REFERENCES......Page 131
DATA AND METHOD......Page 133
RESULTS......Page 135
DISCUSSION AND CONCLUSIONS......Page 138
REFERENCES......Page 140
1. INTRODUCTION......Page 141
2.1 Definition of the model, data and inversion......Page 143
2.2 Model SH8/U4L8......Page 146
2.3 Correlations Between Mantle Heterogeneity, Plate Motions,and Nonhydrostatic Geoid......Page 150
3. Viscous FLOW CALCULATIONS OF THE NONHYDROSTATIC GEOID AND TECTONIC PLATE MOTIONS......Page 152
3.1 The Predicted Northydrostatic Geoid......Page 153
3.2 The Predicted Plate Motions......Page 160
4. Viscous FLOW CALCULATION OF THE DYNAMIC CMB TOPOGRAPHY......Page 162
5. SUMMARY......Page 168
REFERENCES......Page 169
EQUATIONS OF CONVECTION WITH PHASE CHANGE......Page 173
COMPUTATIONAL APPROACH......Page 175
INFLUENCE OF THE CLAPEYRON SLOPE......Page 176
SHORT WAVELENGTH THERMAL ANOMALIES......Page 177
FILTERING OF SEISMIC TOMOGRAPHY......Page 179
RMS OF THE TEMPERATURE ANOMALIES......Page 180
P-WAVE PROPAGATION......Page 182
SUMMARY AND DISCUSSION......Page 183
REFERENCES......Page 185
INTRODUCTION......Page 186
PROCEDURE......Page 187
RESULTS AND DISCUSSION......Page 188
Thermal gradient......Page 190
D" Equations of State......Page 191
REFERENCES......Page 193