The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation
International audience The horizontal and vertical circulation of the Weddell Gyre is diagnosed using a box inverse model constructed with recent hydrographic sections and including mobile sea ice and eddy transports. The gyre is found to convey 42 6 8 Sv (1 Sv 5 106 m3 s–1) across the central Wedde...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hal.science/hal-01255764 https://hal.science/hal-01255764/document https://hal.science/hal-01255764/file/andrex_jgr_final_withfig.pdf https://doi.org/10.1002/2013JC009725 |
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ftunivtoulon:oai:HAL:hal-01255764v1 2024-02-11T09:57:12+01:00 The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation Jullion, Loïc Naveira Garabato, Alberto C. Bacon, Sheldon Meredith, Michael P. J. Brown, Peter Torres-Valdés, Sinhue Speer, Kevin Holland, Paul, H. Dong, Jun Bakker, Dorothée Hoppema, Mario Loose, Brice Venables, Hugh J. Jenkins, William, J. Messias, Marie-José Fahrbach, Eberhard Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Nathional Oceanography Centre University of Southampton National Oceanography Centre (NOC) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) University of East Anglia Norwich (UEA) National Oceanography Centre Southampton (NOC) Florida State University Tallahassee (FSU) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association University of Rhode Island University of Rhode Island (URI) Woods Hole Oceanographic Institution (WHOI) 2014-06-05 https://hal.science/hal-01255764 https://hal.science/hal-01255764/document https://hal.science/hal-01255764/file/andrex_jgr_final_withfig.pdf https://doi.org/10.1002/2013JC009725 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1002/2013JC009725 hal-01255764 https://hal.science/hal-01255764 https://hal.science/hal-01255764/document https://hal.science/hal-01255764/file/andrex_jgr_final_withfig.pdf doi:10.1002/2013JC009725 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-01255764 Journal of Geophysical Research. Oceans, 2014, 119 (6), pp.3357-3377. ⟨10.1002/2013JC009725⟩ http://doi.wiley.com/10.1002/2013JC009725 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2014 ftunivtoulon https://doi.org/10.1002/2013JC009725 2024-01-16T23:34:53Z International audience The horizontal and vertical circulation of the Weddell Gyre is diagnosed using a box inverse model constructed with recent hydrographic sections and including mobile sea ice and eddy transports. The gyre is found to convey 42 6 8 Sv (1 Sv 5 106 m3 s–1) across the central Weddell Sea and to intensify to 54 6 15 Sv further offshore. This circulation injects 36 6 13 TW of heat from the Antarctic Circumpolar Current to the gyre, and exports 51 6 23 mSv of freshwater, including 13 6 1 mSv as sea ice to the midlati- tude Southern Ocean. The gyre’s overturning circulation has an asymmetric double-cell structure, in which 13 6 4 Sv of Circumpolar Deep Water (CDW) and relatively light Antarctic Bottom Water (AABW) are trans- formed into upper-ocean water masses by midgyre upwelling (at a rate of 2 6 2 Sv) and into denser AABW by downwelling focussed at the western boundary (8 6 2 Sv). The gyre circulation exhibits a substantial throughflow component, by which CDW and AABW enter the gyre from the Indian sector, undergo ventila- tion and densification within the gyre, and are exported to the South Atlantic across the gyre’s northern rim. The relatively modest net production of AABW in the Weddell Gyre (6 6 2 Sv) suggests that the gyre’s prominence in the closure of the lower limb of global oceanic overturning stems largely from the recycling and equatorward export of Indian-sourced AABW. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Weddell Sea Université de Toulon: HAL Antarctic Southern Ocean The Antarctic Weddell Sea Indian Weddell Journal of Geophysical Research: Oceans 119 6 3357 3377 |
institution |
Open Polar |
collection |
Université de Toulon: HAL |
op_collection_id |
ftunivtoulon |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Jullion, Loïc Naveira Garabato, Alberto C. Bacon, Sheldon Meredith, Michael P. J. Brown, Peter Torres-Valdés, Sinhue Speer, Kevin Holland, Paul, H. Dong, Jun Bakker, Dorothée Hoppema, Mario Loose, Brice Venables, Hugh J. Jenkins, William, J. Messias, Marie-José Fahrbach, Eberhard The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The horizontal and vertical circulation of the Weddell Gyre is diagnosed using a box inverse model constructed with recent hydrographic sections and including mobile sea ice and eddy transports. The gyre is found to convey 42 6 8 Sv (1 Sv 5 106 m3 s–1) across the central Weddell Sea and to intensify to 54 6 15 Sv further offshore. This circulation injects 36 6 13 TW of heat from the Antarctic Circumpolar Current to the gyre, and exports 51 6 23 mSv of freshwater, including 13 6 1 mSv as sea ice to the midlati- tude Southern Ocean. The gyre’s overturning circulation has an asymmetric double-cell structure, in which 13 6 4 Sv of Circumpolar Deep Water (CDW) and relatively light Antarctic Bottom Water (AABW) are trans- formed into upper-ocean water masses by midgyre upwelling (at a rate of 2 6 2 Sv) and into denser AABW by downwelling focussed at the western boundary (8 6 2 Sv). The gyre circulation exhibits a substantial throughflow component, by which CDW and AABW enter the gyre from the Indian sector, undergo ventila- tion and densification within the gyre, and are exported to the South Atlantic across the gyre’s northern rim. The relatively modest net production of AABW in the Weddell Gyre (6 6 2 Sv) suggests that the gyre’s prominence in the closure of the lower limb of global oceanic overturning stems largely from the recycling and equatorward export of Indian-sourced AABW. |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Nathional Oceanography Centre University of Southampton National Oceanography Centre (NOC) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) University of East Anglia Norwich (UEA) National Oceanography Centre Southampton (NOC) Florida State University Tallahassee (FSU) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association University of Rhode Island University of Rhode Island (URI) Woods Hole Oceanographic Institution (WHOI) |
format |
Article in Journal/Newspaper |
author |
Jullion, Loïc Naveira Garabato, Alberto C. Bacon, Sheldon Meredith, Michael P. J. Brown, Peter Torres-Valdés, Sinhue Speer, Kevin Holland, Paul, H. Dong, Jun Bakker, Dorothée Hoppema, Mario Loose, Brice Venables, Hugh J. Jenkins, William, J. Messias, Marie-José Fahrbach, Eberhard |
author_facet |
Jullion, Loïc Naveira Garabato, Alberto C. Bacon, Sheldon Meredith, Michael P. J. Brown, Peter Torres-Valdés, Sinhue Speer, Kevin Holland, Paul, H. Dong, Jun Bakker, Dorothée Hoppema, Mario Loose, Brice Venables, Hugh J. Jenkins, William, J. Messias, Marie-José Fahrbach, Eberhard |
author_sort |
Jullion, Loïc |
title |
The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation |
title_short |
The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation |
title_full |
The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation |
title_fullStr |
The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation |
title_full_unstemmed |
The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation |
title_sort |
contribution of the weddell gyre to the lower limb of the global overturning circulation |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-01255764 https://hal.science/hal-01255764/document https://hal.science/hal-01255764/file/andrex_jgr_final_withfig.pdf https://doi.org/10.1002/2013JC009725 |
geographic |
Antarctic Southern Ocean The Antarctic Weddell Sea Indian Weddell |
geographic_facet |
Antarctic Southern Ocean The Antarctic Weddell Sea Indian Weddell |
genre |
Antarc* Antarctic Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean Weddell Sea |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-01255764 Journal of Geophysical Research. Oceans, 2014, 119 (6), pp.3357-3377. ⟨10.1002/2013JC009725⟩ http://doi.wiley.com/10.1002/2013JC009725 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2013JC009725 hal-01255764 https://hal.science/hal-01255764 https://hal.science/hal-01255764/document https://hal.science/hal-01255764/file/andrex_jgr_final_withfig.pdf doi:10.1002/2013JC009725 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2013JC009725 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
6 |
container_start_page |
3357 |
op_container_end_page |
3377 |
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1790609486899052544 |