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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Online Access: | https://doi.org/10.1002/2016GL069479 https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf https://archimer.ifremer.fr/doc/00344/45566/ |
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fttriple:oai:gotriple.eu:10670/1.ubcklt 2023-05-15T13:49:13+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. https://doi.org/10.1002/2016GL069479 https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf https://archimer.ifremer.fr/doc/00344/45566/ en eng Amer Geophysical Union doi:10.1002/2016GL069479 10670/1.ubcklt https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf https://archimer.ifremer.fr/doc/00344/45566/ other Archimer, archive institutionnelle de l'Ifremer Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2016-07 , Vol. 43 , N. 13 , P. 7089-7096 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1002/2016GL069479 2023-01-22T16:44:32Z 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. Text Antarc* Antarctic Ice Shelves Unknown Antarctic The Antarctic Geophysical Research Letters 43 13 7089 7096 |
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English |
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geo envir 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 |
geo envir |
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 |
Text |
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 |
url |
https://doi.org/10.1002/2016GL069479 https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf 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 |
Archimer, archive institutionnelle de l'Ifremer Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2016-07 , Vol. 43 , N. 13 , P. 7089-7096 |
op_relation |
doi:10.1002/2016GL069479 10670/1.ubcklt https://archimer.ifremer.fr/doc/00344/45566/45173.pdf https://archimer.ifremer.fr/doc/00344/45566/45174.pdf https://archimer.ifremer.fr/doc/00344/45566/ |
op_rights |
other |
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 |
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1766251007478595584 |