Arctic Ocean Sediments: Processes, Proxies, and Paleoenvironment -  R. Stein

Arctic Ocean Sediments: Processes, Proxies, and Paleoenvironment (eBook)

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2008 | 1. Auflage
608 Seiten
Elsevier Science (Verlag)
978-0-08-055885-1 (ISBN)
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Although it is generally accepted that the Arctic Ocean is a very sensitive and important region for changes in the global climate, this region is the last major physiographic province of the earth whose short-and long-term geological history is much less known in comparison to other ocean regions. This lack of knowledge is mainly caused by the major technological/logistic problems in reaching this harsh, ice-covered region with normal research vessels and in retrieving long and undisturbed sediment cores. During the the last about 20 years, however, several international and multidisciplinary ship expeditions, including the first scientific drilling on Lomonosov Ridge in 2004, a break-through in Arctic research, were carried out into the central Artic and its surrounding shelf seas. Results from these expeditions have greatly advanced our knowledge on Arctic Ocean paleoenvironments.
Published syntheses about the knowledge on Arctic Ocean geology, on the other hand, are based on data available prior to 1990. A comprehensive compilation of data on Arctic Ocean paleoenvironment and its short-and long-term variability based on the huge amount of new data including the ACEX drilling data, has not been available yet. With this book, presenting (1) detailed information on glacio-marine sedimentary processes and geological proxies used for paleoenvironmental reconstructions, and (2) detailed geological data on modern environments, Quaternary variability on different time scales as well as the long-term climate history during Mesozoic-Tertiary times, this gap in knowledge will be filled.

*Aimed at specialists and graduates
*Presents background research, recent developments, and future trends
*Written by a leading scholar and industry expert
Although it is generally accepted that the Arctic Ocean is a very sensitive and important region for changes in the global climate, this region is the last major physiographic province of the earth whose short-and long-term geological history is much less known in comparison to other ocean regions. This lack of knowledge is mainly caused by the major technological/logistic problems in reaching this harsh, ice-covered region with normal research vessels and in retrieving long and undisturbed sediment cores. During the the last about 20 years, however, several international and multidisciplinary ship expeditions, including the first scientific drilling on Lomonosov Ridge in 2004, a break-through in Arctic research, were carried out into the central Artic and its surrounding shelf seas. Results from these expeditions have greatly advanced our knowledge on Arctic Ocean paleoenvironments. Published syntheses about the knowledge on Arctic Ocean geology, on the other hand, are based on data available prior to 1990. A comprehensive compilation of data on Arctic Ocean paleoenvironment and its short-and long-term variability based on the huge amount of new data including the ACEX drilling data, has not been available yet. With this book, presenting (1) detailed information on glacio-marine sedimentary processes and geological proxies used for paleoenvironmental reconstructions, and (2) detailed geological data on modern environments, Quaternary variability on different time scales as well as the long-term climate history during Mesozoic-Tertiary times, this gap in knowledge will be filled.*Aimed at specialists and graduates *Presents background research, recent developments, and future trends*Written by a leading scholar and industry expert

Front Cover 1
Developments in Marine Geology 4
Copyright page 5
Dedication 6
Contents 8
Preface 10
Acknowledgements 11
List of Abbreviations 14
Part 1: Introduction and Background 16
Chapter 1. Introduction to the Arctic: Significance and History 18
1.1 The Arctic Ocean and Its Significance for the Earth’s Climate System 18
1.2 History of Arctic Ocean Research 24
1.3 Plate Tectonic Evolution and Palaeogeography 37
1.4 Glaciations in Earth’s History 45
Chapter 2. Modern Physiography, Hydrology, Climate, and Sediment Input 50
2.1 Bathymetry and Physiography 50
2.2 Oceanic Circulation Pattern and Water-Mass Characteristics 55
2.3 Sea-Ice Cover: Extent, Thickness, and Variability 63
2.4 Primary Production and Vertical Carbon Fluxes in the Arctic Ocean 70
2.5 River Discharge 78
2.6 Permafrost 91
2.7 Coastal Erosion 93
2.8 Aeolian Input 97
2.9 Modern Sediment Input: A Summary 99
Part 2: Processes and Proxies 100
Chapter 4. Proxies Used for Palaeoenvironmental Reconstructions in the Arctic Ocean 148
4.1 Lithofacies Concept 148
4.2 Grain-Size Distribution 154
4.3 Proxies for Sources and Transport Processes of Terrigenous Sediments 161
4.4 Trace Elements Used for Palaeoenvironmental Reconstruction 182
4.5 Micropalaeontological Proxies and Their (Palaeo-) Environmental and Stratigraphical Significance 185
4.6 Stable Isotopes of Foraminifers 216
4.7 Organic-Geochemical Proxies for Organic-Carbon Source and Palaeoenvironment 220
Chapter 3. Glacio-Marine Sedimentary Processes 102
3.1 Sea-Ice Processes: Sediment Entrainment and Transport 103
3.2 Ice Sheet- and Iceberg-Related Processes 110
3.3 Sediment Mass-Wasting Processes 116
3.4 Turbidite Sedimentation in the Central Arctic Ocean 141
Part 3: The Marine-Geological Record 260
5.2 Organic-Carbon Content: Terrigenous Supply versus Primary Production 288
Chapter 6. Quaternary Variability of Palaeoenvironment and Its Sedimentary Record 302
6.1 The Stratigraphic Framework of Arctic Ocean Sediment Cores: Background, Problems, and Perspectives 302
6.2 Variability of Quaternary Ice Sheets and Palaeoceanographic Characteristics: Terrestrial, Model, and Eurasian Continental Margin Records 332
6.3 Circum-Arctic Glacial History, Sea-Ice Cover, and Surface-Water Characteristics: Quaternary Records from the Central Arctic Ocean 384
6.4 Accumulation of Particulate Organic Carbon at the Arctic Continental Margin and Deep-Sea Areas During Late Quaternary Times 424
Chapter 7. Mesozoic to Cenozoic Palaeoenvironmental Records of High Northern Latitudes 454
7.1 Mesozoic High-Latitude Palaeoclimate and Arctic Ocean Palaeoenvironment 454
7.2 Cenozoic High-Latitude Palaeoclimate and Arctic Ocean Palaeoenvironment 472
Chapter 8. Open Questions and Future Geoscientific Arctic Ocean Research 512
8.1 Quaternary and Neogene Climate Variability on Sub-Millennial to Milankovich Time Scales 513
8.2 The Mesozoic-Cenozoic History of the Arctic Ocean 515
References 522
Subject Index 602

Erscheint lt. Verlag 22.7.2008
Sprache englisch
Themenwelt Naturwissenschaften Geowissenschaften Geologie
Naturwissenschaften Geowissenschaften Hydrologie / Ozeanografie
Naturwissenschaften Geowissenschaften Mineralogie / Paläontologie
Technik
ISBN-10 0-08-055885-2 / 0080558852
ISBN-13 978-0-08-055885-1 / 9780080558851
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