Two-layer model of wind-driven circulation in the Antarctic Ocean
In this study, we investigate the wind-driven circulation in the Antarctic Ocean using a primitive two-layer model with realistic topography. A prominent feature of steady circulation driven by the annual mean wind stress is a clockwise(cyclonic) circulation in the lower layer at the Weddell Basin a...
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National Institute of Polar Research, Kokuritsu Kyokuchi Kenkyujo
2003
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ftunivtasecite:oai:ecite.utas.edu.au:109892 2023-05-15T14:03:26+02:00 Two-layer model of wind-driven circulation in the Antarctic Ocean Kusahara, K Ohshima, KI Katsumata, K 2003 application/pdf http://www.nipr.ac.jp/english/index.html http://ecite.utas.edu.au/109892 en eng National Institute of Polar Research, Kokuritsu Kyokuchi Kenkyujo http://ecite.utas.edu.au/109892/1/Kusahara_PMG_2003.pdf Kusahara, K and Ohshima, KI and Katsumata, K, Two-layer model of wind-driven circulation in the Antarctic Ocean, Polar Meteorology and Glaciology, 17 pp. 36-47. ISSN 1344-3437 (2003) [Refereed Article] http://ecite.utas.edu.au/109892 Earth Sciences Atmospheric Sciences Climate Change Processes Refereed Article PeerReviewed 2003 ftunivtasecite 2019-12-13T22:10:32Z In this study, we investigate the wind-driven circulation in the Antarctic Ocean using a primitive two-layer model with realistic topography. A prominent feature of steady circulation driven by the annual mean wind stress is a clockwise(cyclonic) circulation in the lower layer at the Weddell Basin and the Australia Antarctic Basin. In particular, the circulation pattern in the Australia Antarctic Basin agrees with the observations. In these basins, negative vorticity input from the wind stress is transmitted to the lower layer through the diffusion term(Gent and McWilliams term) and causes prominent cyclonic gyres within closed geostrophic contours of f/H(f: Coriolis parameter, H: water depth). The model result forced by the seasonal wind stress shows that variations of the Antarctic Coastal Current are explained by wind stress variations along the coast. The transport of this current is determined by the integration of onshore Ekman transport along the coast. It is also shown that this Antarctic Coastal Current can be a part of the western boundary current in the Weddell Sea. On a time scale of 10 to 100 days, the variation of the upper layer thickness coincides with the sea level variation at Syowa Station. This variation might be attributed to coastal trapped waves driven by the alongshore wind stress. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Polar meteorology and glaciology Weddell Sea eCite UTAS (University of Tasmania) Antarctic Antarctic Ocean Syowa Station The Antarctic Weddell Weddell Basin ENVELOPE(32.019,32.019,-55.568,-55.568) Weddell Sea |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Atmospheric Sciences Climate Change Processes |
spellingShingle |
Earth Sciences Atmospheric Sciences Climate Change Processes Kusahara, K Ohshima, KI Katsumata, K Two-layer model of wind-driven circulation in the Antarctic Ocean |
topic_facet |
Earth Sciences Atmospheric Sciences Climate Change Processes |
description |
In this study, we investigate the wind-driven circulation in the Antarctic Ocean using a primitive two-layer model with realistic topography. A prominent feature of steady circulation driven by the annual mean wind stress is a clockwise(cyclonic) circulation in the lower layer at the Weddell Basin and the Australia Antarctic Basin. In particular, the circulation pattern in the Australia Antarctic Basin agrees with the observations. In these basins, negative vorticity input from the wind stress is transmitted to the lower layer through the diffusion term(Gent and McWilliams term) and causes prominent cyclonic gyres within closed geostrophic contours of f/H(f: Coriolis parameter, H: water depth). The model result forced by the seasonal wind stress shows that variations of the Antarctic Coastal Current are explained by wind stress variations along the coast. The transport of this current is determined by the integration of onshore Ekman transport along the coast. It is also shown that this Antarctic Coastal Current can be a part of the western boundary current in the Weddell Sea. On a time scale of 10 to 100 days, the variation of the upper layer thickness coincides with the sea level variation at Syowa Station. This variation might be attributed to coastal trapped waves driven by the alongshore wind stress. |
format |
Article in Journal/Newspaper |
author |
Kusahara, K Ohshima, KI Katsumata, K |
author_facet |
Kusahara, K Ohshima, KI Katsumata, K |
author_sort |
Kusahara, K |
title |
Two-layer model of wind-driven circulation in the Antarctic Ocean |
title_short |
Two-layer model of wind-driven circulation in the Antarctic Ocean |
title_full |
Two-layer model of wind-driven circulation in the Antarctic Ocean |
title_fullStr |
Two-layer model of wind-driven circulation in the Antarctic Ocean |
title_full_unstemmed |
Two-layer model of wind-driven circulation in the Antarctic Ocean |
title_sort |
two-layer model of wind-driven circulation in the antarctic ocean |
publisher |
National Institute of Polar Research, Kokuritsu Kyokuchi Kenkyujo |
publishDate |
2003 |
url |
http://www.nipr.ac.jp/english/index.html http://ecite.utas.edu.au/109892 |
long_lat |
ENVELOPE(32.019,32.019,-55.568,-55.568) |
geographic |
Antarctic Antarctic Ocean Syowa Station The Antarctic Weddell Weddell Basin Weddell Sea |
geographic_facet |
Antarctic Antarctic Ocean Syowa Station The Antarctic Weddell Weddell Basin Weddell Sea |
genre |
Antarc* Antarctic Antarctic Ocean Polar meteorology and glaciology Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Ocean Polar meteorology and glaciology Weddell Sea |
op_relation |
http://ecite.utas.edu.au/109892/1/Kusahara_PMG_2003.pdf Kusahara, K and Ohshima, KI and Katsumata, K, Two-layer model of wind-driven circulation in the Antarctic Ocean, Polar Meteorology and Glaciology, 17 pp. 36-47. ISSN 1344-3437 (2003) [Refereed Article] http://ecite.utas.edu.au/109892 |
_version_ |
1766274092280840192 |