Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea
International audience Recent decadal changes in Southern Hemisphere climate have driven strong responses from the cryo- sphere. Concurrently, there has been a marked freshening of the shelf and bottom waters across a wide sector of the Southern Ocean, hypothesized to be caused by accelerated glacia...
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Online Access: | https://hal.science/hal-01255767 https://hal.science/hal-01255767/document https://hal.science/hal-01255767/file/larsen_jclim_submitted.pdf https://doi.org/10.1175/JCLI-D-12-00765.1 |
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ftunivtoulon:oai:HAL:hal-01255767v1 2024-04-28T07:59:09+00:00 Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea Jullion, Loïc Naveira Garabato, Alberto C. Meredith, Michael P. Holland, Paul, H. Courtois, Peggy King, Brian A. 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 British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2013-10-15 https://hal.science/hal-01255767 https://hal.science/hal-01255767/document https://hal.science/hal-01255767/file/larsen_jclim_submitted.pdf https://doi.org/10.1175/JCLI-D-12-00765.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-12-00765.1 hal-01255767 https://hal.science/hal-01255767 https://hal.science/hal-01255767/document https://hal.science/hal-01255767/file/larsen_jclim_submitted.pdf doi:10.1175/JCLI-D-12-00765.1 info:eu-repo/semantics/OpenAccess ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-01255767 Journal of Climate, 2013, 26 (20), pp.8111-8125. ⟨10.1175/JCLI-D-12-00765.1⟩ http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-12-00765.1 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2013 ftunivtoulon https://doi.org/10.1175/JCLI-D-12-00765.1 2024-04-10T23:46:38Z International audience Recent decadal changes in Southern Hemisphere climate have driven strong responses from the cryo- sphere. Concurrently, there has been a marked freshening of the shelf and bottom waters across a wide sector of the Southern Ocean, hypothesized to be caused by accelerated glacial melt in response to a greater flux of warm waters from the Antarctic Circumpolar Current onto the shelves of West Antarctica. However, the circumpolar pattern of changes has been incomplete: no decadal freshening in the deep layers of the Atlantic sector has been observed. In this study, the authors document a significant freshening of the Antarctic Bottom Water exported from the Weddell Sea, which is the source for the abyssal layer of the Atlantic overturning circulation, and trace its possible origin to atmospheric-forced changes in the ice shelves and sea ice on the eastern flank of the Antarctic Peninsula that include an anthropogenic component. These findings suggest that the expansive and relatively cool Weddell gyre does not insulate the bottom water formation regions in the Atlantic sector from the ongoing changes in climatic forcing over the Antarctic region. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelves Sea ice Southern Ocean Weddell Sea West Antarctica Université de Toulon: HAL Journal of Climate 26 20 8111 8125 |
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. Meredith, Michael P. Holland, Paul, H. Courtois, Peggy King, Brian A. Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Recent decadal changes in Southern Hemisphere climate have driven strong responses from the cryo- sphere. Concurrently, there has been a marked freshening of the shelf and bottom waters across a wide sector of the Southern Ocean, hypothesized to be caused by accelerated glacial melt in response to a greater flux of warm waters from the Antarctic Circumpolar Current onto the shelves of West Antarctica. However, the circumpolar pattern of changes has been incomplete: no decadal freshening in the deep layers of the Atlantic sector has been observed. In this study, the authors document a significant freshening of the Antarctic Bottom Water exported from the Weddell Sea, which is the source for the abyssal layer of the Atlantic overturning circulation, and trace its possible origin to atmospheric-forced changes in the ice shelves and sea ice on the eastern flank of the Antarctic Peninsula that include an anthropogenic component. These findings suggest that the expansive and relatively cool Weddell gyre does not insulate the bottom water formation regions in the Atlantic sector from the ongoing changes in climatic forcing over the Antarctic region. |
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 British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Jullion, Loïc Naveira Garabato, Alberto C. Meredith, Michael P. Holland, Paul, H. Courtois, Peggy King, Brian A. |
author_facet |
Jullion, Loïc Naveira Garabato, Alberto C. Meredith, Michael P. Holland, Paul, H. Courtois, Peggy King, Brian A. |
author_sort |
Jullion, Loïc |
title |
Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea |
title_short |
Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea |
title_full |
Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea |
title_fullStr |
Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea |
title_full_unstemmed |
Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea |
title_sort |
decadal freshening of the antarctic bottom water exported from the weddell sea |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-01255767 https://hal.science/hal-01255767/document https://hal.science/hal-01255767/file/larsen_jclim_submitted.pdf https://doi.org/10.1175/JCLI-D-12-00765.1 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelves Sea ice Southern Ocean Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelves Sea ice Southern Ocean Weddell Sea West Antarctica |
op_source |
ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-01255767 Journal of Climate, 2013, 26 (20), pp.8111-8125. ⟨10.1175/JCLI-D-12-00765.1⟩ http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-12-00765.1 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-12-00765.1 hal-01255767 https://hal.science/hal-01255767 https://hal.science/hal-01255767/document https://hal.science/hal-01255767/file/larsen_jclim_submitted.pdf doi:10.1175/JCLI-D-12-00765.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JCLI-D-12-00765.1 |
container_title |
Journal of Climate |
container_volume |
26 |
container_issue |
20 |
container_start_page |
8111 |
op_container_end_page |
8125 |
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1797572029629595648 |