The Antarctic Paleoenvironment: A Perspective on Global Change: Part Two

• Tongue: English
• Leaves: 280
• Category: Library

✦ Synopsis

About The Product

Published by the American Geophysical Union as part of the Antarctic Research Series.

The Antarctic continent and the surrounding Southern Ocean represent one of the major climate engines of the Earth: coupled components critical in the Earth's environmental system. The contributions in this volume help with the understanding of the long-term evolution of Antarctica's environment and biota. The aim of this and the preceding companion volume is to help place the modern system within a historical context.

The environment and biosphere of the Antarctic region have undergone dynamic changes through geologic time. These, in turn, have played a key role in long-term global paleoenvironmental evolution. The development of the Southern Ocean itself, resulting from plate tectonism, created first-order changes in the circulation of the global ocean, in turn affecting meridional heat transport and hence global climates. Biospheric changes responded to the changing oceanic climatic states. Comprehension of the climatic and oceano-graphic processes that have operated at various times in Antarctica's history is crucial to the understanding of the present-day global environmental system. This knowledge will become increasingly important in parallel with concerns about anthropogenically caused global change. How vulnerable is the Antarctic region, especially its ice sheets, to global warming? The question is not parochial, given the potential of sea level change resulting from any Antarctic cryospheric development. Conversely, how much of a role does the Antarctic region, this giant icebox, play in moderating global, including sea level, change?

Content:

✦ Table of Contents

Title page
......Page 5
Contents
......Page 7
Preface
......Page 10
Acknowledgements
......Page 11
INTRODUCTION......Page 12
DEEPWATER CIRCULATION PATTERNS......Page 15
REFERENCES......Page 33
INTRODUCTION......Page 37
METHODS......Page 39
RESULTS......Page 42
DISCUSSION......Page 44
CONCLUSIONS......Page 52
REFERENCES......Page 56
INTRODUCTION......Page 59
STRATIGRAPHY AND FORAMINIFERAL
PRESERVATION......Page 61
ISOTOPIC SYSTEMATICS AND STRATIFICATION
OF PLANKTONIC FORAMINIFERA......Page 66
MIDDLE EOCENE TO OLIGOCENE
TEMPERATURES AND
OCEANOGRAPHIC CHANGES......Page 70
CONCLUSIONS......Page 73
REFERENCES......Page 74
INTRODUCTION......Page 76
THE POLLEN DATA......Page 77
AGE RELATIONSHIPS......Page 80
REFERENCES......Page 81
INTRODUCTION......Page 83
OVERDEEPENING OF THE CONTINENTAL
SHELF......Page 85
STRATIGRAPHY OF GLACIAL BANKS
AND TROUGHS......Page 90
SCIENTIFIC DRILLING......Page 92
SUMMARY......Page 95
REFERENCES......Page 96
INTRODUCTION......Page 98
GLACIOLOGICAL, BATHYMETRIC, AND
GEOLOGICAL SETTING OF
THE ROSS EMBAYMENT......Page 99
INTERPRETATION OF SEDIMENTARY
SUCCESSIONS......Page 102
EVIDENCE FOR TEMPERATE OR POLAR ICE
SHEETS AND LOCAL OR CONTINENTAL
GLACIATION......Page 114
THE CLIMATIC AND GLACIAL RECORD......Page 117
COMPARISON WITH OTHER ANTARCTIC AND
SOUTHERN OCEAN SITES......Page 120
DISCUSSION......Page 121
CONCLUSIONS AND FUTURE WORK......Page 126
REFERENCES......Page 127
BIOSTRATIGRAPHIC FRAMEWORK......Page 132
THE CENOZOIC......Page 134
REFERENCES......Page 149
INTRODUCTION......Page 152
MODERN CIRCULATION......Page 153
MODERN SEDIMENT DISTRIBUTION......Page 154
PLATE RECONSTRUCTIONS,
PALEOCIRCULATION
SIMULATIONS, AND CHRONOLOGY......Page 157
RESULTS......Page 160
TIME SERIES CHANGES IN RADIOLARIAN
FAUNAS FROM SELECTED LOCALES......Page 163
CENOZOIC ANTARCTIC DEEP-SEA
SEDIMENT DISTRIBUTIONS......Page 164
RECONSTRUCTIONS......Page 168
DISCUSSION......Page 176
REFERENCES......Page 179
INTRODUCTION......Page 182
DISTRIBUTION AND DURATION OF SPECIES......Page 183
PALEOENVIRONMENTAL CHANGES......Page 184
CENOZOIC FAUNAS......Page 189
REFERENCES......Page 199
INTRODUCTION......Page 202
METHODOLOGY......Page 204
GEOGRAPHIC DISTRIBUTION OF THE
PLEXID MORPHOLOGIES......Page 205
PALEOENVIRONMENTAL INTERPRETATIONS......Page 209
APPENDIX B: TAXONOMIC DISTINCTIONS......Page 212
REFERENCES......Page 213
INTRODUCTION......Page 214
METHODS......Page 217
RESULTS......Page 218
DISCUSSION......Page 250
REFERENCES......Page 254
INTRODUCTION......Page 258
SECTIONS IN THE VESTFOLD HILLS......Page 259
LARSEMANN HILLS......Page 265
OTHER LOCALITIES......Page 266
DISCUSSION......Page 267
FUTURE RESEARCH......Page 268
REFERENCES......Page 269
METHODS......Page 272
RESULTS......Page 273
DISCUSSION......Page 277
REFERENCES......Page 278