Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes
International audience Antarctic Bottom Water (AABW) is pivotal for oceanic heat and carbon sequestrations on multidecadal to millennial timescales. The Weddell Sea contributes nearly a half of global AABW through Weddell Sea Deep Water and denser underlying Weddell Sea Bottom Water that form on the...
Published in: | Nature Climate Change |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2023
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Online Access: | https://insu.hal.science/insu-04188261 https://insu.hal.science/insu-04188261/document https://insu.hal.science/insu-04188261/file/s41558-023-01695-4.pdf https://doi.org/10.1038/s41558-023-01695-4 |
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English |
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[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Zhou, Shenjie Meijers, Andrew J. S. Meredith, Michael P. Abrahamsen, E. Povl Holland, Paul R. Silvano, Alessandro Sallée, Jean-Baptiste Østerhus, Svein Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Antarctic Bottom Water (AABW) is pivotal for oceanic heat and carbon sequestrations on multidecadal to millennial timescales. The Weddell Sea contributes nearly a half of global AABW through Weddell Sea Deep Water and denser underlying Weddell Sea Bottom Water that form on the continental shelves via sea-ice production. Here we report an observed 30% reduction of Weddell Sea Bottom Water volume since 1992, with the largest decrease in the densest classes. This is probably driven by a multidecadal reduction in dense-water production over southern continental shelf associated with a >40% decline in the sea-ice formation rate. The ice production decrease is driven by northerly wind trend, related to a phase transition of the Interdecadal Pacific Oscillation since the early 1990s, superposed by Amundsen Sea Low intrinsic variability. These results reveal key influences on exported AABW to the Atlantic abyss and their sensitivity to large-scale, multidecadal climate variability. |
author2 |
British Antarctic Survey (BAS) Natural Environment Research Council (NERC) National Oceanography Centre (NOC) Processus et interactions de fine échelle océanique (PROTEO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Norwegian Research Center (NORCE) European Project: 821001,SO-CHIC(2019) European Project: 820575,TiPACCs |
format |
Article in Journal/Newspaper |
author |
Zhou, Shenjie Meijers, Andrew J. S. Meredith, Michael P. Abrahamsen, E. Povl Holland, Paul R. Silvano, Alessandro Sallée, Jean-Baptiste Østerhus, Svein |
author_facet |
Zhou, Shenjie Meijers, Andrew J. S. Meredith, Michael P. Abrahamsen, E. Povl Holland, Paul R. Silvano, Alessandro Sallée, Jean-Baptiste Østerhus, Svein |
author_sort |
Zhou, Shenjie |
title |
Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes |
title_short |
Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes |
title_full |
Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes |
title_fullStr |
Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes |
title_full_unstemmed |
Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes |
title_sort |
slowdown of antarctic bottom water export driven by climatic wind and sea-ice changes |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04188261 https://insu.hal.science/insu-04188261/document https://insu.hal.science/insu-04188261/file/s41558-023-01695-4.pdf https://doi.org/10.1038/s41558-023-01695-4 |
genre |
Amundsen Sea Antarc* Antarctic Sea ice Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Sea ice Weddell Sea |
op_source |
ISSN: 1758-678X EISSN: 1758-6798 Nature Climate Change https://insu.hal.science/insu-04188261 Nature Climate Change, 2023, 13, pp.701-709. ⟨10.1038/s41558-023-01695-4⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1038/s41558-023-01695-4 info:eu-repo/grantAgreement//821001/EU/Southern Ocean Carbon and Heat Impact on Climate/SO-CHIC info:eu-repo/grantAgreement//820575/EU/Tipping Points in Antarctic Climate Components/TiPACCs insu-04188261 https://insu.hal.science/insu-04188261 https://insu.hal.science/insu-04188261/document https://insu.hal.science/insu-04188261/file/s41558-023-01695-4.pdf BIBCODE: 2023NatCC.13.701Z doi:10.1038/s41558-023-01695-4 WOS: 001004931500003 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41558-023-01695-4 |
container_title |
Nature Climate Change |
container_volume |
13 |
container_issue |
7 |
container_start_page |
701 |
op_container_end_page |
709 |
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1810477685792571392 |
spelling |
ftsorbonneuniv:oai:HAL:insu-04188261v1 2024-09-15T17:39:07+00:00 Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes Zhou, Shenjie Meijers, Andrew J. S. Meredith, Michael P. Abrahamsen, E. Povl Holland, Paul R. Silvano, Alessandro Sallée, Jean-Baptiste Østerhus, Svein British Antarctic Survey (BAS) Natural Environment Research Council (NERC) National Oceanography Centre (NOC) Processus et interactions de fine échelle océanique (PROTEO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Norwegian Research Center (NORCE) European Project: 821001,SO-CHIC(2019) European Project: 820575,TiPACCs 2023 https://insu.hal.science/insu-04188261 https://insu.hal.science/insu-04188261/document https://insu.hal.science/insu-04188261/file/s41558-023-01695-4.pdf https://doi.org/10.1038/s41558-023-01695-4 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41558-023-01695-4 info:eu-repo/grantAgreement//821001/EU/Southern Ocean Carbon and Heat Impact on Climate/SO-CHIC info:eu-repo/grantAgreement//820575/EU/Tipping Points in Antarctic Climate Components/TiPACCs insu-04188261 https://insu.hal.science/insu-04188261 https://insu.hal.science/insu-04188261/document https://insu.hal.science/insu-04188261/file/s41558-023-01695-4.pdf BIBCODE: 2023NatCC.13.701Z doi:10.1038/s41558-023-01695-4 WOS: 001004931500003 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1758-678X EISSN: 1758-6798 Nature Climate Change https://insu.hal.science/insu-04188261 Nature Climate Change, 2023, 13, pp.701-709. ⟨10.1038/s41558-023-01695-4⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftsorbonneuniv https://doi.org/10.1038/s41558-023-01695-4 2024-08-01T23:46:50Z International audience Antarctic Bottom Water (AABW) is pivotal for oceanic heat and carbon sequestrations on multidecadal to millennial timescales. The Weddell Sea contributes nearly a half of global AABW through Weddell Sea Deep Water and denser underlying Weddell Sea Bottom Water that form on the continental shelves via sea-ice production. Here we report an observed 30% reduction of Weddell Sea Bottom Water volume since 1992, with the largest decrease in the densest classes. This is probably driven by a multidecadal reduction in dense-water production over southern continental shelf associated with a >40% decline in the sea-ice formation rate. The ice production decrease is driven by northerly wind trend, related to a phase transition of the Interdecadal Pacific Oscillation since the early 1990s, superposed by Amundsen Sea Low intrinsic variability. These results reveal key influences on exported AABW to the Atlantic abyss and their sensitivity to large-scale, multidecadal climate variability. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Sea ice Weddell Sea HAL Sorbonne Université Nature Climate Change 13 7 701 709 |