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.archives-ouvertes.fr/hal-02517906 https://hal.archives-ouvertes.fr/hal-02517906/document https://hal.archives-ouvertes.fr/hal-02517906/file/Main_text_and_methods_with_figures.pdf https://doi.org/10.1038/s41558-019-0561-2 |
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ftccsdartic:oai:HAL:hal-02517906v1 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
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, Polzin, Kurt L. Naveira Garabato, Alberto C. King, Brian, Firing, Yvonne Sallée, Jean-Baptiste Sheen, Katy Gordon, Arnold Huber, Bruce Meredith, Michael 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) Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 de Paris (UP)-École normale supérieure - Paris (ENS Paris) 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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-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)-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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) University of Exeter Lamont-Doherty Earth Observatory (LDEO) Columbia University New York |
format |
Article in Journal/Newspaper |
author |
Abrahamsen, E. Povl Meijers, Andrew, Polzin, Kurt L. Naveira Garabato, Alberto C. King, Brian, Firing, Yvonne Sallée, Jean-Baptiste Sheen, Katy Gordon, Arnold Huber, Bruce Meredith, Michael |
author_facet |
Abrahamsen, E. Povl Meijers, Andrew, Polzin, Kurt L. Naveira Garabato, Alberto C. King, Brian, Firing, Yvonne Sallée, Jean-Baptiste Sheen, Katy Gordon, Arnold Huber, Bruce Meredith, Michael |
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.archives-ouvertes.fr/hal-02517906 https://hal.archives-ouvertes.fr/hal-02517906/document https://hal.archives-ouvertes.fr/hal-02517906/file/Main_text_and_methods_with_figures.pdf https://doi.org/10.1038/s41558-019-0561-2 |
geographic |
Antarctic Weddell Sea Scotia Sea Weddell |
geographic_facet |
Antarctic Weddell Sea Scotia Sea Weddell |
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.archives-ouvertes.fr/hal-02517906 Nature Climate Change, Nature Publishing Group, 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.archives-ouvertes.fr/hal-02517906 https://hal.archives-ouvertes.fr/hal-02517906/document https://hal.archives-ouvertes.fr/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_ |
1766251306360504320 |
spelling |
ftccsdartic:oai:HAL:hal-02517906v1 2023-05-15T13:49:24+02:00 Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation Abrahamsen, E. Povl Meijers, Andrew, Polzin, Kurt L. Naveira Garabato, Alberto C. King, Brian, Firing, Yvonne Sallée, Jean-Baptiste Sheen, Katy Gordon, Arnold Huber, Bruce Meredith, Michael 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) Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 de Paris (UP)-École normale supérieure - Paris (ENS Paris) 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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-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)-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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) University of Exeter Lamont-Doherty Earth Observatory (LDEO) Columbia University New York 2019-10 https://hal.archives-ouvertes.fr/hal-02517906 https://hal.archives-ouvertes.fr/hal-02517906/document https://hal.archives-ouvertes.fr/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.archives-ouvertes.fr/hal-02517906 https://hal.archives-ouvertes.fr/hal-02517906/document https://hal.archives-ouvertes.fr/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.archives-ouvertes.fr/hal-02517906 Nature Climate Change, Nature Publishing Group, 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 ftccsdartic https://doi.org/10.1038/s41558-019-0561-2 2021-12-19T00:45:00Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Weddell Sea Scotia Sea Weddell Nature Climate Change 9 10 742 746 |