Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation
International audience The lower limb of the Atlantic overturning circulation is resupplied by the sinking of dense Antarctic Bottom Water (AABW) that forms via intense air–sea–ice interactions next to Antarctica, especially in the Weddell Sea1. In the last three decades, AABW has warmed, freshened...
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
2019
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Subjects: | |
Online Access: | https://hal.science/hal-02517906 https://hal.science/hal-02517906/document https://hal.science/hal-02517906/file/Main_text_and_methods_with_figures.pdf https://doi.org/10.1038/s41558-019-0561-2 |
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ftepunivpsaclay:oai:HAL:hal-02517906v1 |
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Open Polar |
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École Polytechnique, Université Paris-Saclay: HAL |
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ftepunivpsaclay |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Abrahamsen, E. Povl Meijers, Andrew, J S Polzin, Kurt L. Naveira Garabato, Alberto C. King, Brian, A Firing, Yvonne Sallée, Jean-Baptiste Sheen, Katy Gordon, Arnold Huber, Bruce Meredith, Michael P. Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience The lower limb of the Atlantic overturning circulation is resupplied by the sinking of dense Antarctic Bottom Water (AABW) that forms via intense air–sea–ice interactions next to Antarctica, especially in the Weddell Sea1. In the last three decades, AABW has warmed, freshened and declined in volume across the Atlantic Ocean and elsewhere2,3,4,5,6,7, suggesting an ongoing major reorganization of oceanic overturning8,9. However, the future contributions of AABW to the Atlantic overturning circulation are unclear. Here, using observations of AABW in the Scotia Sea, the most direct pathway from the Weddell Sea to the Atlantic Ocean, we show a recent cessation in the decline of the AABW supply to the Atlantic overturning circulation. The strongest decline was observed in the volume of the densest layers in the AABW throughflow from the early 1990s to 2014; since then, it has stabilized and partially recovered. We link these changes to variability in the densest classes of abyssal waters upstream. Our findings indicate that the previously observed decline in the supply of dense water to the Atlantic Ocean abyss may be stabilizing or reversing and thus call for a reassessment of Antarctic influences on overturning circulation, sea level, planetary-scale heat distribution and global climate |
author2 |
British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Woods Hole Oceanographic Institution (WHOI) Ocean and Earth Science Southampton University of Southampton-National Oceanography Centre (NOC) National Oceanography Centre Southampton (NOC) University of Southampton 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)-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)-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)) 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)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) University of Exeter Lamont-Doherty Earth Observatory (LDEO) Columbia University New York |
format |
Article in Journal/Newspaper |
author |
Abrahamsen, E. Povl Meijers, Andrew, J S Polzin, Kurt L. Naveira Garabato, Alberto C. King, Brian, A Firing, Yvonne Sallée, Jean-Baptiste Sheen, Katy Gordon, Arnold Huber, Bruce Meredith, Michael P. |
author_facet |
Abrahamsen, E. Povl Meijers, Andrew, J S Polzin, Kurt L. Naveira Garabato, Alberto C. King, Brian, A Firing, Yvonne Sallée, Jean-Baptiste Sheen, Katy Gordon, Arnold Huber, Bruce Meredith, Michael P. |
author_sort |
Abrahamsen, E. Povl |
title |
Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation |
title_short |
Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation |
title_full |
Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation |
title_fullStr |
Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation |
title_full_unstemmed |
Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation |
title_sort |
stabilization of dense antarctic water supply to the atlantic ocean overturning circulation |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02517906 https://hal.science/hal-02517906/document https://hal.science/hal-02517906/file/Main_text_and_methods_with_figures.pdf https://doi.org/10.1038/s41558-019-0561-2 |
genre |
Antarc* Antarctic Antarctica Scotia Sea Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Scotia Sea Sea ice Weddell Sea |
op_source |
ISSN: 1758-678X EISSN: 1758-6798 Nature Climate Change https://hal.science/hal-02517906 Nature Climate Change, 2019, 9 (10), pp.742-746. ⟨10.1038/s41558-019-0561-2⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41558-019-0561-2 hal-02517906 https://hal.science/hal-02517906 https://hal.science/hal-02517906/document https://hal.science/hal-02517906/file/Main_text_and_methods_with_figures.pdf doi:10.1038/s41558-019-0561-2 WOS: 000487830200013 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41558-019-0561-2 |
container_title |
Nature Climate Change |
container_volume |
9 |
container_issue |
10 |
container_start_page |
742 |
op_container_end_page |
746 |
_version_ |
1799483339321638912 |
spelling |
ftepunivpsaclay:oai:HAL:hal-02517906v1 2024-05-19T07:30:02+00:00 Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation Abrahamsen, E. Povl Meijers, Andrew, J S Polzin, Kurt L. Naveira Garabato, Alberto C. King, Brian, A Firing, Yvonne Sallée, Jean-Baptiste Sheen, Katy Gordon, Arnold Huber, Bruce Meredith, Michael P. British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Woods Hole Oceanographic Institution (WHOI) Ocean and Earth Science Southampton University of Southampton-National Oceanography Centre (NOC) National Oceanography Centre Southampton (NOC) University of Southampton 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)-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)-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)) 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)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) University of Exeter Lamont-Doherty Earth Observatory (LDEO) Columbia University New York 2019-10 https://hal.science/hal-02517906 https://hal.science/hal-02517906/document https://hal.science/hal-02517906/file/Main_text_and_methods_with_figures.pdf https://doi.org/10.1038/s41558-019-0561-2 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41558-019-0561-2 hal-02517906 https://hal.science/hal-02517906 https://hal.science/hal-02517906/document https://hal.science/hal-02517906/file/Main_text_and_methods_with_figures.pdf doi:10.1038/s41558-019-0561-2 WOS: 000487830200013 info:eu-repo/semantics/OpenAccess ISSN: 1758-678X EISSN: 1758-6798 Nature Climate Change https://hal.science/hal-02517906 Nature Climate Change, 2019, 9 (10), pp.742-746. ⟨10.1038/s41558-019-0561-2⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2019 ftepunivpsaclay https://doi.org/10.1038/s41558-019-0561-2 2024-04-25T00:45:55Z International audience The lower limb of the Atlantic overturning circulation is resupplied by the sinking of dense Antarctic Bottom Water (AABW) that forms via intense air–sea–ice interactions next to Antarctica, especially in the Weddell Sea1. In the last three decades, AABW has warmed, freshened and declined in volume across the Atlantic Ocean and elsewhere2,3,4,5,6,7, suggesting an ongoing major reorganization of oceanic overturning8,9. However, the future contributions of AABW to the Atlantic overturning circulation are unclear. Here, using observations of AABW in the Scotia Sea, the most direct pathway from the Weddell Sea to the Atlantic Ocean, we show a recent cessation in the decline of the AABW supply to the Atlantic overturning circulation. The strongest decline was observed in the volume of the densest layers in the AABW throughflow from the early 1990s to 2014; since then, it has stabilized and partially recovered. We link these changes to variability in the densest classes of abyssal waters upstream. Our findings indicate that the previously observed decline in the supply of dense water to the Atlantic Ocean abyss may be stabilizing or reversing and thus call for a reassessment of Antarctic influences on overturning circulation, sea level, planetary-scale heat distribution and global climate Article in Journal/Newspaper Antarc* Antarctic Antarctica Scotia Sea Sea ice Weddell Sea École Polytechnique, Université Paris-Saclay: HAL Nature Climate Change 9 10 742 746 |