Gerold Wefer's Books

The South Atlantic

Present and Past Circulation

By: Gerold Wefer,Wolfgang H. Berger,Gerold Siedler,David J. Webb

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The South Atlantic

Present and Past Circulation

By: Gerold Wefer,Wolfgang H. Berger,Gerold Siedler,David J. Webb

The book presents results of recent projects in oceanography and marine geosciences (e.g. WOCE, JGOFS, PAGES, ODP) regarding present and past circulation in the South Atlantic. The objective of the book is to integrate results from both oceanographic and geological studies. As the connecting link between the Antarctic and the North Atlantic, the South Atlantic plays a crucial role with regard to the heat budget of the North Atlantic and to the biogeochemical budget of the global ocean. New results from studies of meridional water mass and heat transports are presented. The central theme of geological investigations is the reconstruction of current and productivity systems in the South Atlantic during the late Quaternary.

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815

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3642803539

ISBN 13

9783642803536

Marine Science Frontiers for Europe

By: Frank Lamy,R. F. C. Mantoura

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Marine Science Frontiers for Europe

By: Frank Lamy,R. F. C. Mantoura

Europe is a continent with a high coast-to-surface ratio, and European seas encompass a broad range of settings and regimes. The sustainable development of living and non-living marine resources, the protection of the marine environment and the provision of marine-based services are critical to economic prosperity and to the quality of life of European citizens. Addressing these concerns, marine-science researchers conducted a workshop reviewing major topics of European marine research. This publication contains overview and thematic background papers, as well as reports and recommendations for future research covering topics such as ocean-climate coupling, biogeochemistry, coastal and shelf processes, and ecosystem functioning/biodiversity.

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Page Count

320

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Springer Science & Business Media

Published Date

ISBN 10

3540401687

ISBN 13

9783540401681

The South Atlantic

Present and Past Circulation

By: Gerold Wefer,Wolfgang H. Berger,Gerold Siedler,David J. Webb

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The South Atlantic

Present and Past Circulation

By: Gerold Wefer,Wolfgang H. Berger,Gerold Siedler,David J. Webb

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Page Count

815

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3642803539

ISBN 13

9783642803536

Use of Proxies in Paleoceanography

Examples from the South Atlantic ; with 43 Tables

By: Gerhard Fischer,Gerold Wefer

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Use of Proxies in Paleoceanography

Examples from the South Atlantic ; with 43 Tables

By: Gerhard Fischer,Gerold Wefer

Paleoceanographic proxies provide infonnation for reconstructions of the past, including climate changes, global and regional oceanography, and the cycles of biochemical components in the ocean. These prox ies are measurable descriptors for desired but unobservable environmental variables such as tempera ture, salinity, primary productivity, nutrient content, or surface-water carbon dioxide concentrations. The proxies are employed in a manner analogous to oceanographic methods. The water masses are first characterized according to their specific physical and chemical properties, and then related to particular assemblages of certain organisms or to particular element or isotope distributions. We have a long-standing series of proven proxies available. Marine microfossil assemblages, for instance, are employed to reconstruct surface-water temperatures. The calcareous shells of planktonic and benthic microorgan isms contain a wealth of paleoceanographic information in their isotopic and elemental compositions. Stable oxygen isotope measurements are used to detennine ice volume, and MglCa ratios are related to water temperatures, to cite a few examples. Organic material may also provide valuable infonnation, e. g. , about past productivity conditions. Studying the stable carbon isotope composition of bulk organic matter or individual marine organic components may provide a measure of past surface-water CO 2 conditions within the bounds of certain assumptions. Within the scope of paleoceanographic investigations, the existing proxies are continuously evolving and improving, while new proxies are being studied and developed. The methodology is improved by analysis of samples from the water column and surface sediments, and through laboratory experiments.

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768

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3540663401

ISBN 13

9783540663409

The South Atlantic in the Late Quaternary

Reconstruction of Materials Budgets and Current Systems

By: Gerold Wefer,Stefan Mulitza,Volker Ratmeyer

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The South Atlantic in the Late Quaternary

Reconstruction of Materials Budgets and Current Systems

By: Gerold Wefer,Stefan Mulitza,Volker Ratmeyer

The South Atlantic plays a significant role as a link between the Antarctic Ocean and the North Atlantic, both in terms of the heat budget of the North Atlantic and the circulation of the entire ocean. The heat and mass exchanges between the Antarctic Ocean and the South Atlantic during the Late Quaternary have been investigated over the past ten years, including their impact on world climate. This has required the study of present-day early diagenetic processes in the water column and sediments, as well as sediment properties that have a close relationship to environmental parameters ("proxies"), which can be used to decipher past conditions (temperature, salinity, productivity, etc.). The interdisciplinary research project "The South Atlantic in the Late Quaternary - Reconstruction of material budgets and current systems" was a long-term scientific program at Bremen University. This program benefited from the sample material gained on several expeditions with the research vessels Meteor and Polarstern. This book presents the summarized results of the various topics of study in 30 articles arranged in seven sections. TOC:Particle Flux in the South Atlantic.- Documentation of the Marine Environment in Microfossil Assemblages and Stable Isotopes.- Physical Sedimentary Records of Palaeoenvironmental and Depositional Conditions.- Source and Transport Signatures of the Terrigenous Sediment Fraction.-Early Diagenetic Processes and Preservation of Primary Signals.-History of Upper Ocean Circulation.- History of Bottom and DeepWater Circulation.-

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Page Count

742

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3540210288

ISBN 13

9783540210283

Marine Science Frontiers for Europe

By: Frank Lamy,R. F. C. Mantoura

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Marine Science Frontiers for Europe

By: Frank Lamy,R. F. C. Mantoura

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N/A

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Solve jigsaw puzzle

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Page Count

320

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3540401687

ISBN 13

9783540401681

Book's by Gerold Wefer

The South Atlantic

The South Atlantic

Marine Science Frontiers for Europe

Marine Science Frontiers for Europe

The South Atlantic

The South Atlantic

Use of Proxies in Paleoceanography

Use of Proxies in Paleoceanography

The South Atlantic in the Late Quaternary

The South Atlantic in the Late Quaternary

Marine Science Frontiers for Europe

Marine Science Frontiers for Europe

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