Controls on circulation, cross-shelf exchange, and dense water formation in an Antarctic polynya
Circulation on the Antarctic continental shelf influences cross-shelf exchange, Antarctic Bottom Water formation, and ocean heat flux to floating ice shelves. The physical processes driving the shelf circulation and its seasonal and interannual variability remain poorly understood. We use a unique t...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Amer Geophysical Union
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Online Access: | https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf https://doi.org/10.1002/2016GL069479 https://archimer.ifremer.fr/doc/00344/45566/ |
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ftarchimer:oai:archimer.ifremer.fr:45566 2023-05-15T13:50:50+02:00 Controls on circulation, cross-shelf exchange, and dense water formation in an Antarctic polynya Snow, K. Sloyan, B. M. Rintoul, S. R. Hogg, A. Mcc. Downes, S. M. 2016-07 application/pdf https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf https://doi.org/10.1002/2016GL069479 https://archimer.ifremer.fr/doc/00344/45566/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf doi:10.1002/2016GL069479 https://archimer.ifremer.fr/doc/00344/45566/ 2016. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2016-07 , Vol. 43 , N. 13 , P. 7089-7096 Antarctic shelf circulation cross-shelf exchange Antarctic bottom water surface fluxes seasonal interannual variability text Publication info:eu-repo/semantics/article 2016 ftarchimer https://doi.org/10.1002/2016GL069479 2021-09-23T20:28:36Z Circulation on the Antarctic continental shelf influences cross-shelf exchange, Antarctic Bottom Water formation, and ocean heat flux to floating ice shelves. The physical processes driving the shelf circulation and its seasonal and interannual variability remain poorly understood. We use a unique time series of repeat hydrographic observations from the Adélie Land continental shelf and a box inverse model to explore the relationship between surface forcing, shelf circulation, cross-shelf exchange, and dense water formation. A wind-driven northwestward coastal current, set up by onshore Ekman transport, dominates the summer circulation. During winter, strong buoyancy loss creates dense shelf water. This dense water flows off the shelf, with a compensating on-shelf flow that is an order of magnitude larger in winter than in summer. The results demonstrate the importance of winter buoyancy loss in driving the shelf circulation and cross-shelf exchange, as well as dense water mass formation. Article in Journal/Newspaper Antarc* Antarctic Ice Shelves Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic The Antarctic Geophysical Research Letters 43 13 7089 7096 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Antarctic shelf circulation cross-shelf exchange Antarctic bottom water surface fluxes seasonal interannual variability |
spellingShingle |
Antarctic shelf circulation cross-shelf exchange Antarctic bottom water surface fluxes seasonal interannual variability Snow, K. Sloyan, B. M. Rintoul, S. R. Hogg, A. Mcc. Downes, S. M. Controls on circulation, cross-shelf exchange, and dense water formation in an Antarctic polynya |
topic_facet |
Antarctic shelf circulation cross-shelf exchange Antarctic bottom water surface fluxes seasonal interannual variability |
description |
Circulation on the Antarctic continental shelf influences cross-shelf exchange, Antarctic Bottom Water formation, and ocean heat flux to floating ice shelves. The physical processes driving the shelf circulation and its seasonal and interannual variability remain poorly understood. We use a unique time series of repeat hydrographic observations from the Adélie Land continental shelf and a box inverse model to explore the relationship between surface forcing, shelf circulation, cross-shelf exchange, and dense water formation. A wind-driven northwestward coastal current, set up by onshore Ekman transport, dominates the summer circulation. During winter, strong buoyancy loss creates dense shelf water. This dense water flows off the shelf, with a compensating on-shelf flow that is an order of magnitude larger in winter than in summer. The results demonstrate the importance of winter buoyancy loss in driving the shelf circulation and cross-shelf exchange, as well as dense water mass formation. |
format |
Article in Journal/Newspaper |
author |
Snow, K. Sloyan, B. M. Rintoul, S. R. Hogg, A. Mcc. Downes, S. M. |
author_facet |
Snow, K. Sloyan, B. M. Rintoul, S. R. Hogg, A. Mcc. Downes, S. M. |
author_sort |
Snow, K. |
title |
Controls on circulation, cross-shelf exchange, and dense water formation in an Antarctic polynya |
title_short |
Controls on circulation, cross-shelf exchange, and dense water formation in an Antarctic polynya |
title_full |
Controls on circulation, cross-shelf exchange, and dense water formation in an Antarctic polynya |
title_fullStr |
Controls on circulation, cross-shelf exchange, and dense water formation in an Antarctic polynya |
title_full_unstemmed |
Controls on circulation, cross-shelf exchange, and dense water formation in an Antarctic polynya |
title_sort |
controls on circulation, cross-shelf exchange, and dense water formation in an antarctic polynya |
publisher |
Amer Geophysical Union |
publishDate |
2016 |
url |
https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf https://doi.org/10.1002/2016GL069479 https://archimer.ifremer.fr/doc/00344/45566/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Shelves |
genre_facet |
Antarc* Antarctic Ice Shelves |
op_source |
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2016-07 , Vol. 43 , N. 13 , P. 7089-7096 |
op_relation |
https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf doi:10.1002/2016GL069479 https://archimer.ifremer.fr/doc/00344/45566/ |
op_rights |
2016. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/2016GL069479 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
13 |
container_start_page |
7089 |
op_container_end_page |
7096 |
_version_ |
1766254155981127680 |