Constraints on the glacial operation of the atlantic ocean's conveyor circulation
Abstract Circulation in the Atlantic Ocean is currently dominated by a northward flow of upper waters balanced by a return flow of deep water (i.e., the conveyor). Paleoproxies tell us that, unlike today, during the glacial age the deep Atlantic was stratified. Rather than being flooded with one nea...
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crwiley:10.1560/8k19-vrhe-6f14-pfqq 2023-12-03T10:29:16+01:00 Constraints on the glacial operation of the atlantic ocean's conveyor circulation Broecker, Wallace S. 2002 http://dx.doi.org/10.1560/8k19-vrhe-6f14-pfqq https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1560%2F8K19-VRHE-6F14-PFQQ https://onlinelibrary.wiley.com/doi/pdf/10.1560/8K19-VRHE-6F14-PFQQ en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Israel Journal of Chemistry volume 42, issue 1, page 1-14 ISSN 0021-2148 1869-5868 General Chemistry journal-article 2002 crwiley https://doi.org/10.1560/8k19-vrhe-6f14-pfqq 2023-11-09T13:28:27Z Abstract Circulation in the Atlantic Ocean is currently dominated by a northward flow of upper waters balanced by a return flow of deep water (i.e., the conveyor). Paleoproxies tell us that, unlike today, during the glacial age the deep Atlantic was stratified. Rather than being flooded with one nearly homogeneous water mass, there were two distinctly different ones. In this paper, the paleoproxy results are analyzed in an attempt to constrain the sources and ventilation rate of the deeper of these two glacial Atlantic water masses. Taken together, the cadmium and carbon isotope measurements on benthic foraminifera and the radiocarbon measurements on coexisting benthic and planktonic foraminifera appear to require a conveyor‐like circulation no weaker than half of today's. This conclusion is at odds with geostrophic reconstructions. This seeming disagreement could be eliminated if, as suggested by Keigwin and Schlegel, the radiocarbon measurements by Broecker et al. significantly underestimate the difference between the 14 C to C ratio for glacialage surface water and deep water in the equatorial Atlantic. Article in Journal/Newspaper Planktonic foraminifera Wiley Online Library (via Crossref) Israel Journal of Chemistry 42 1 1 14 |
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Wiley Online Library (via Crossref) |
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English |
topic |
General Chemistry |
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General Chemistry Broecker, Wallace S. Constraints on the glacial operation of the atlantic ocean's conveyor circulation |
topic_facet |
General Chemistry |
description |
Abstract Circulation in the Atlantic Ocean is currently dominated by a northward flow of upper waters balanced by a return flow of deep water (i.e., the conveyor). Paleoproxies tell us that, unlike today, during the glacial age the deep Atlantic was stratified. Rather than being flooded with one nearly homogeneous water mass, there were two distinctly different ones. In this paper, the paleoproxy results are analyzed in an attempt to constrain the sources and ventilation rate of the deeper of these two glacial Atlantic water masses. Taken together, the cadmium and carbon isotope measurements on benthic foraminifera and the radiocarbon measurements on coexisting benthic and planktonic foraminifera appear to require a conveyor‐like circulation no weaker than half of today's. This conclusion is at odds with geostrophic reconstructions. This seeming disagreement could be eliminated if, as suggested by Keigwin and Schlegel, the radiocarbon measurements by Broecker et al. significantly underestimate the difference between the 14 C to C ratio for glacialage surface water and deep water in the equatorial Atlantic. |
format |
Article in Journal/Newspaper |
author |
Broecker, Wallace S. |
author_facet |
Broecker, Wallace S. |
author_sort |
Broecker, Wallace S. |
title |
Constraints on the glacial operation of the atlantic ocean's conveyor circulation |
title_short |
Constraints on the glacial operation of the atlantic ocean's conveyor circulation |
title_full |
Constraints on the glacial operation of the atlantic ocean's conveyor circulation |
title_fullStr |
Constraints on the glacial operation of the atlantic ocean's conveyor circulation |
title_full_unstemmed |
Constraints on the glacial operation of the atlantic ocean's conveyor circulation |
title_sort |
constraints on the glacial operation of the atlantic ocean's conveyor circulation |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1560/8k19-vrhe-6f14-pfqq https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1560%2F8K19-VRHE-6F14-PFQQ https://onlinelibrary.wiley.com/doi/pdf/10.1560/8K19-VRHE-6F14-PFQQ |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Israel Journal of Chemistry volume 42, issue 1, page 1-14 ISSN 0021-2148 1869-5868 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1560/8k19-vrhe-6f14-pfqq |
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Israel Journal of Chemistry |
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42 |
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1 |
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1 |
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14 |
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1784254505953525760 |