No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum
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...
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Nature Research
2020
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ftoceanrep:oai:oceanrep.geomar.de:48864 2023-05-15T14:10:52+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 2020-01-22 text other https://oceanrep.geomar.de/id/eprint/48864/ https://oceanrep.geomar.de/id/eprint/48864/1/s41467-020-14302-3.pdf https://oceanrep.geomar.de/id/eprint/48864/3/41467_2020_14302_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/48864/4/41467_2020_14302_MOESM3_ESM.pdf https://oceanrep.geomar.de/id/eprint/48864/5/41467_2020_14302_MOESM4_ESM.xlsx https://oceanrep.geomar.de/id/eprint/48864/6/41467_2020_14302_MOESM5_ESM.xlsx https://oceanrep.geomar.de/id/eprint/48864/7/41467_2020_14302_MOESM6_ESM.xlsx https://doi.org/10.1038/s41467-020-14302-3 en eng Nature Research https://oceanrep.geomar.de/id/eprint/48864/1/s41467-020-14302-3.pdf https://oceanrep.geomar.de/id/eprint/48864/3/41467_2020_14302_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/48864/4/41467_2020_14302_MOESM3_ESM.pdf https://oceanrep.geomar.de/id/eprint/48864/5/41467_2020_14302_MOESM4_ESM.xlsx https://oceanrep.geomar.de/id/eprint/48864/6/41467_2020_14302_MOESM5_ESM.xlsx https://oceanrep.geomar.de/id/eprint/48864/7/41467_2020_14302_MOESM6_ESM.xlsx Huang, H. , Gutjahr, M. , Eisenhauer, A. and Kuhn, G. (2020) No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum. Open Access Nature Communications, 11 (424). DOI 10.1038/s41467-020-14302-3 <https://doi.org/10.1038/s41467-020-14302-3>. doi:10.1038/s41467-020-14302-3 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2020 ftoceanrep https://doi.org/10.1038/s41467-020-14302-3 2023-04-07T15:49:12Z 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 CO2 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Southern Ocean Weddell Weddell Sea Nature Communications 11 1 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
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 CO2 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 |
spellingShingle |
Huang, Huang Gutjahr, Marcus Eisenhauer, Anton Kuhn, Gerhard No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum |
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 |
Nature Research |
publishDate |
2020 |
url |
https://oceanrep.geomar.de/id/eprint/48864/ https://oceanrep.geomar.de/id/eprint/48864/1/s41467-020-14302-3.pdf https://oceanrep.geomar.de/id/eprint/48864/3/41467_2020_14302_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/48864/4/41467_2020_14302_MOESM3_ESM.pdf https://oceanrep.geomar.de/id/eprint/48864/5/41467_2020_14302_MOESM4_ESM.xlsx https://oceanrep.geomar.de/id/eprint/48864/6/41467_2020_14302_MOESM5_ESM.xlsx https://oceanrep.geomar.de/id/eprint/48864/7/41467_2020_14302_MOESM6_ESM.xlsx https://doi.org/10.1038/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_relation |
https://oceanrep.geomar.de/id/eprint/48864/1/s41467-020-14302-3.pdf https://oceanrep.geomar.de/id/eprint/48864/3/41467_2020_14302_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/48864/4/41467_2020_14302_MOESM3_ESM.pdf https://oceanrep.geomar.de/id/eprint/48864/5/41467_2020_14302_MOESM4_ESM.xlsx https://oceanrep.geomar.de/id/eprint/48864/6/41467_2020_14302_MOESM5_ESM.xlsx https://oceanrep.geomar.de/id/eprint/48864/7/41467_2020_14302_MOESM6_ESM.xlsx Huang, H. , Gutjahr, M. , Eisenhauer, A. and Kuhn, G. (2020) No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum. Open Access Nature Communications, 11 (424). DOI 10.1038/s41467-020-14302-3 <https://doi.org/10.1038/s41467-020-14302-3>. doi:10.1038/s41467-020-14302-3 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-020-14302-3 |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
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1766282967374626816 |