No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum
Abstract Weddell Sea-derived Antarctic Bottom Water (AABW) is one of the most important deep water masses in the Southern Hemisphere occupying large portions of the deep Southern Ocean (SO) today. While substantial changes in SO-overturning circulation were previously suggested, the state of Weddell...
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Online Access: | http://dx.doi.org/10.1038/s41467-020-14302-3 http://www.nature.com/articles/s41467-020-14302-3.pdf http://www.nature.com/articles/s41467-020-14302-3 |
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crspringernat:10.1038/s41467-020-14302-3 2023-05-15T14:11:11+02:00 No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum Huang, Huang Gutjahr, Marcus Eisenhauer, Anton Kuhn, Gerhard 2020 http://dx.doi.org/10.1038/s41467-020-14302-3 http://www.nature.com/articles/s41467-020-14302-3.pdf http://www.nature.com/articles/s41467-020-14302-3 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Nature Communications volume 11, issue 1 ISSN 2041-1723 General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry journal-article 2020 crspringernat https://doi.org/10.1038/s41467-020-14302-3 2022-01-04T16:51:46Z Abstract Weddell Sea-derived Antarctic Bottom Water (AABW) is one of the most important deep water masses in the Southern Hemisphere occupying large portions of the deep Southern Ocean (SO) today. While substantial changes in SO-overturning circulation were previously suggested, the state of Weddell Sea AABW export during glacial climates remains poorly understood. Here we report seawater-derived Nd and Pb isotope records that provide evidence for the absence of Weddell Sea-derived AABW in the Atlantic sector of the SO during the last two glacial maxima. Increasing delivery of Antarctic Pb to regions outside the Weddell Sea traced SO frontal displacements during both glacial terminations. The export of Weddell Sea-derived AABW resumed late during glacial terminations, coinciding with the last major atmospheric CO 2 rise in the transition to the Holocene and the Eemian. Our new records lend strong support for a previously inferred AABW overturning stagnation event during the peak Eemian interglacial. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Weddell Sea Springer Nature (via Crossref) Antarctic Southern Ocean Weddell Weddell Sea Nature Communications 11 1 |
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Open Polar |
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Springer Nature (via Crossref) |
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crspringernat |
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English |
topic |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
spellingShingle |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry Huang, Huang Gutjahr, Marcus Eisenhauer, Anton Kuhn, Gerhard No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum |
topic_facet |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
description |
Abstract Weddell Sea-derived Antarctic Bottom Water (AABW) is one of the most important deep water masses in the Southern Hemisphere occupying large portions of the deep Southern Ocean (SO) today. While substantial changes in SO-overturning circulation were previously suggested, the state of Weddell Sea AABW export during glacial climates remains poorly understood. Here we report seawater-derived Nd and Pb isotope records that provide evidence for the absence of Weddell Sea-derived AABW in the Atlantic sector of the SO during the last two glacial maxima. Increasing delivery of Antarctic Pb to regions outside the Weddell Sea traced SO frontal displacements during both glacial terminations. The export of Weddell Sea-derived AABW resumed late during glacial terminations, coinciding with the last major atmospheric CO 2 rise in the transition to the Holocene and the Eemian. Our new records lend strong support for a previously inferred AABW overturning stagnation event during the peak Eemian interglacial. |
format |
Article in Journal/Newspaper |
author |
Huang, Huang Gutjahr, Marcus Eisenhauer, Anton Kuhn, Gerhard |
author_facet |
Huang, Huang Gutjahr, Marcus Eisenhauer, Anton Kuhn, Gerhard |
author_sort |
Huang, Huang |
title |
No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum |
title_short |
No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum |
title_full |
No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum |
title_fullStr |
No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum |
title_full_unstemmed |
No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum |
title_sort |
no detectable weddell sea antarctic bottom water export during the last and penultimate glacial maximum |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1038/s41467-020-14302-3 http://www.nature.com/articles/s41467-020-14302-3.pdf http://www.nature.com/articles/s41467-020-14302-3 |
geographic |
Antarctic Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Southern Ocean Weddell Sea |
op_source |
Nature Communications volume 11, issue 1 ISSN 2041-1723 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-020-14302-3 |
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Nature Communications |
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11 |
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1 |
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1766283301706792960 |