Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre
Four repeat hydrographic sections across the eastern Weddell gyre at 30°E reveal a warming (by ~0.1°C) and lightening (by ~0.02–0.03 kg m−3) of the Antarctic Bottom Water (AABW) entering the gyre from the Indian sector of the Southern Ocean between the mid-1990s and late 2000s. Historical hydrograph...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/500831/ https://nora.nerc.ac.uk/id/eprint/500831/1/grl50526.pdf |
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ftnerc:oai:nora.nerc.ac.uk:500831 2023-05-15T13:48:07+02:00 Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre Couldrey, Matthew P. Jullion, Loic Naveira Garabato, Alberto C. Rye, Craig Herraiz-Borreguero, Laura Brown, Peter J. Meredith, Michael P. Speer, Kevin L. 2013-06 text http://nora.nerc.ac.uk/id/eprint/500831/ https://nora.nerc.ac.uk/id/eprint/500831/1/grl50526.pdf en eng https://nora.nerc.ac.uk/id/eprint/500831/1/grl50526.pdf Couldrey, Matthew P.; Jullion, Loic; Naveira Garabato, Alberto C.; Rye, Craig; Herraiz-Borreguero, Laura; Brown, Peter J.; Meredith, Michael P. orcid:0000-0002-7342-7756 Speer, Kevin L. 2013 Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre. Geophysical Research Letters, 40 (11). 2755-2760. https://doi.org/10.1002/grl.50526 <https://doi.org/10.1002/grl.50526> Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.1002/grl.50526 2023-02-04T19:36:31Z Four repeat hydrographic sections across the eastern Weddell gyre at 30°E reveal a warming (by ~0.1°C) and lightening (by ~0.02–0.03 kg m−3) of the Antarctic Bottom Water (AABW) entering the gyre from the Indian sector of the Southern Ocean between the mid-1990s and late 2000s. Historical hydrographic and altimetric measurements in the region suggest that the most likely explanation for the change is increased entrainment of warmer mid-depth Circumpolar Deep Water by cascading shelf water plumes close to Cape Darnley, where the Indian-sourced AABW entering the Weddell gyre from the east is ventilated. This change in entrainment is associated with a concurrent southward shift of the Antarctic Circumpolar Current's (ACC) southern boundary in the region. This mechanism of AABW warming may affect wherever the ACC flows close to Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Indian Weddell Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) Cape Darnley ENVELOPE(69.567,69.567,-67.738,-67.738) Geophysical Research Letters 40 11 2755 2760 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Four repeat hydrographic sections across the eastern Weddell gyre at 30°E reveal a warming (by ~0.1°C) and lightening (by ~0.02–0.03 kg m−3) of the Antarctic Bottom Water (AABW) entering the gyre from the Indian sector of the Southern Ocean between the mid-1990s and late 2000s. Historical hydrographic and altimetric measurements in the region suggest that the most likely explanation for the change is increased entrainment of warmer mid-depth Circumpolar Deep Water by cascading shelf water plumes close to Cape Darnley, where the Indian-sourced AABW entering the Weddell gyre from the east is ventilated. This change in entrainment is associated with a concurrent southward shift of the Antarctic Circumpolar Current's (ACC) southern boundary in the region. This mechanism of AABW warming may affect wherever the ACC flows close to Antarctica. |
format |
Article in Journal/Newspaper |
author |
Couldrey, Matthew P. Jullion, Loic Naveira Garabato, Alberto C. Rye, Craig Herraiz-Borreguero, Laura Brown, Peter J. Meredith, Michael P. Speer, Kevin L. |
spellingShingle |
Couldrey, Matthew P. Jullion, Loic Naveira Garabato, Alberto C. Rye, Craig Herraiz-Borreguero, Laura Brown, Peter J. Meredith, Michael P. Speer, Kevin L. Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre |
author_facet |
Couldrey, Matthew P. Jullion, Loic Naveira Garabato, Alberto C. Rye, Craig Herraiz-Borreguero, Laura Brown, Peter J. Meredith, Michael P. Speer, Kevin L. |
author_sort |
Couldrey, Matthew P. |
title |
Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre |
title_short |
Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre |
title_full |
Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre |
title_fullStr |
Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre |
title_full_unstemmed |
Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre |
title_sort |
remotely induced warming of antarctic bottom water in the eastern weddell gyre |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/500831/ https://nora.nerc.ac.uk/id/eprint/500831/1/grl50526.pdf |
long_lat |
ENVELOPE(69.717,69.717,-67.717,-67.717) ENVELOPE(69.567,69.567,-67.738,-67.738) |
geographic |
Antarctic Southern Ocean The Antarctic Indian Weddell Darnley Cape Darnley |
geographic_facet |
Antarctic Southern Ocean The Antarctic Indian Weddell Darnley Cape Darnley |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/500831/1/grl50526.pdf Couldrey, Matthew P.; Jullion, Loic; Naveira Garabato, Alberto C.; Rye, Craig; Herraiz-Borreguero, Laura; Brown, Peter J.; Meredith, Michael P. orcid:0000-0002-7342-7756 Speer, Kevin L. 2013 Remotely induced warming of Antarctic Bottom Water in the eastern Weddell gyre. Geophysical Research Letters, 40 (11). 2755-2760. https://doi.org/10.1002/grl.50526 <https://doi.org/10.1002/grl.50526> |
op_doi |
https://doi.org/10.1002/grl.50526 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
11 |
container_start_page |
2755 |
op_container_end_page |
2760 |
_version_ |
1766248635457077248 |