Reconstruction and analysis of the Chukchi Sea circulation in 1990–1991
Author Posting. © American Geophysical Union, 2010. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 115 (2010): C08023, doi:10.1029/2009JC005453. The Chukchi Sea...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3918 2023-05-15T15:15:47+02:00 Reconstruction and analysis of the Chukchi Sea circulation in 1990–1991 Panteleev, G. Nechaev, D. A. Proshutinsky, Andrey Woodgate, Rebecca Zhang, Jinlun 2010-08-24 application/pdf https://hdl.handle.net/1912/3918 en_US eng American Geophysical Union https://doi.org/10.1029/2009JC005453 Journal of Geophysical Research 115 (2010): C08023 https://hdl.handle.net/1912/3918 doi:10.1029/2009JC005453 Journal of Geophysical Research 115 (2010): C08023 doi:10.1029/2009JC005453 Chukchi Sea 4D-var data assimilation Article 2010 ftwhoas https://doi.org/10.1029/2009JC005453 2022-05-28T22:58:07Z Author Posting. © American Geophysical Union, 2010. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 115 (2010): C08023, doi:10.1029/2009JC005453. The Chukchi Sea (CS) circulation reconstructed for September 1990 to October 1991 from sea ice and ocean data is presented and analyzed. The core of the observational data used in this study comprises the records from 12 moorings deployed in 1990 and 1991 in U.S. and Russian waters and two hydrographic surveys conducted in the region in the fall of 1990 and 1991. The observations are processed by a two-step data assimilation procedure involving the Pan-Arctic Ice-Ocean Modeling and Assimilation System (employing a nudging algorithm for sea ice data assimilation) and the Semi-implicit Ocean Model [utilizing a conventional four-dimensional variational (4D-var) assimilation technique]. The reconstructed CS circulation is studied to identify pathways and assess residence times of Pacific water in the region; quantify the balances of volume, freshwater, and heat content; and determine the leading dynamical factors configuring the CS circulation. It is found that in 1990–1991 (high AO index and a cyclonic circulation regime) Pacific water transiting the CS toward the Canada basin followed two major pathways, namely via Herald Canyon (Herald branch of circulation, 0.23 Sv) and between Herald Shoal and Cape Lisburne (central branch of circulation and Alaskan Coastal Current, 0.32 Sv). The annual mean flow through Long Strait was negligible (0.01 Sv). Typical residence time of Pacific water in the region varied between 150 days for waters entering the CS in September and 270 days for waters entering in February/March. Momentum balance analysis reveals that geostrophic balance between barotropic pressure gradient and Coriolis force dominated for most of the year. Baroclinic effects were important for circulation only in the regions with ... Article in Journal/Newspaper Arctic canada basin Chukchi Chukchi Sea Sea ice Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Canada Chukchi Sea Pacific Journal of Geophysical Research 115 C8 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Chukchi Sea 4D-var data assimilation |
spellingShingle |
Chukchi Sea 4D-var data assimilation Panteleev, G. Nechaev, D. A. Proshutinsky, Andrey Woodgate, Rebecca Zhang, Jinlun Reconstruction and analysis of the Chukchi Sea circulation in 1990–1991 |
topic_facet |
Chukchi Sea 4D-var data assimilation |
description |
Author Posting. © American Geophysical Union, 2010. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 115 (2010): C08023, doi:10.1029/2009JC005453. The Chukchi Sea (CS) circulation reconstructed for September 1990 to October 1991 from sea ice and ocean data is presented and analyzed. The core of the observational data used in this study comprises the records from 12 moorings deployed in 1990 and 1991 in U.S. and Russian waters and two hydrographic surveys conducted in the region in the fall of 1990 and 1991. The observations are processed by a two-step data assimilation procedure involving the Pan-Arctic Ice-Ocean Modeling and Assimilation System (employing a nudging algorithm for sea ice data assimilation) and the Semi-implicit Ocean Model [utilizing a conventional four-dimensional variational (4D-var) assimilation technique]. The reconstructed CS circulation is studied to identify pathways and assess residence times of Pacific water in the region; quantify the balances of volume, freshwater, and heat content; and determine the leading dynamical factors configuring the CS circulation. It is found that in 1990–1991 (high AO index and a cyclonic circulation regime) Pacific water transiting the CS toward the Canada basin followed two major pathways, namely via Herald Canyon (Herald branch of circulation, 0.23 Sv) and between Herald Shoal and Cape Lisburne (central branch of circulation and Alaskan Coastal Current, 0.32 Sv). The annual mean flow through Long Strait was negligible (0.01 Sv). Typical residence time of Pacific water in the region varied between 150 days for waters entering the CS in September and 270 days for waters entering in February/March. Momentum balance analysis reveals that geostrophic balance between barotropic pressure gradient and Coriolis force dominated for most of the year. Baroclinic effects were important for circulation only in the regions with ... |
format |
Article in Journal/Newspaper |
author |
Panteleev, G. Nechaev, D. A. Proshutinsky, Andrey Woodgate, Rebecca Zhang, Jinlun |
author_facet |
Panteleev, G. Nechaev, D. A. Proshutinsky, Andrey Woodgate, Rebecca Zhang, Jinlun |
author_sort |
Panteleev, G. |
title |
Reconstruction and analysis of the Chukchi Sea circulation in 1990–1991 |
title_short |
Reconstruction and analysis of the Chukchi Sea circulation in 1990–1991 |
title_full |
Reconstruction and analysis of the Chukchi Sea circulation in 1990–1991 |
title_fullStr |
Reconstruction and analysis of the Chukchi Sea circulation in 1990–1991 |
title_full_unstemmed |
Reconstruction and analysis of the Chukchi Sea circulation in 1990–1991 |
title_sort |
reconstruction and analysis of the chukchi sea circulation in 1990–1991 |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
https://hdl.handle.net/1912/3918 |
geographic |
Arctic Canada Chukchi Sea Pacific |
geographic_facet |
Arctic Canada Chukchi Sea Pacific |
genre |
Arctic canada basin Chukchi Chukchi Sea Sea ice |
genre_facet |
Arctic canada basin Chukchi Chukchi Sea Sea ice |
op_source |
Journal of Geophysical Research 115 (2010): C08023 doi:10.1029/2009JC005453 |
op_relation |
https://doi.org/10.1029/2009JC005453 Journal of Geophysical Research 115 (2010): C08023 https://hdl.handle.net/1912/3918 doi:10.1029/2009JC005453 |
op_doi |
https://doi.org/10.1029/2009JC005453 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
C8 |
_version_ |
1766346129297899520 |