Numerical study of winter water formation in the Chukchi Sea : Roles and impacts of coastal polynyas
Winter water formation is examined in the Chukchi Sea for the winters of 1992-2006 using a primitive equation ocean model forced by NCEP wind and surface salinity flux derived from SSM/I thin ice thickness estimates. The model is also forced by an external inflow of 0.8 Sv through the Bering Strait....
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Online Access: | http://hdl.handle.net/2115/48147 https://doi.org/10.1029/2010JC006606 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/48147 2023-05-15T14:29:13+02:00 Numerical study of winter water formation in the Chukchi Sea : Roles and impacts of coastal polynyas Kawaguchi, Yusuke Tamura, Takeshi Nishino, Shigeto Kikuchi, Takashi Itoh, Motoyo Mitsudera, Humio http://hdl.handle.net/2115/48147 https://doi.org/10.1029/2010JC006606 eng eng American Geophysical Union http://hdl.handle.net/2115/48147 Journal of Geophysical Research, Oceans, 116: C07025 http://dx.doi.org/10.1029/2010JC006606 Copyright 2011 American Geophysical Union. 452 article fthokunivhus https://doi.org/10.1029/2010JC006606 2022-11-18T01:02:15Z Winter water formation is examined in the Chukchi Sea for the winters of 1992-2006 using a primitive equation ocean model forced by NCEP wind and surface salinity flux derived from SSM/I thin ice thickness estimates. The model is also forced by an external inflow of 0.8 Sv through the Bering Strait. The model successfully reproduces the oceanic circulation on the Chukchi shelf, thus providing numerous insights into behaviors of salt-enriched water produced on the shelf. The experiments show that under northeasterly winds, northward throughflow across Barrow Canyon is reduced. This results in salinity buildup under freezing conditions and ultimately in greater enhancement of salinity of the waters carried into the Arctic Basin. The flow and salinity enhancement of the flow through Herald Canyon is less extreme but more steady than through Barrow Canyon. Together with moored salinity in the Bering Strait, the model results estimate the actual salinity to be 32.9 ± 0.8 psu and 32.7 ± 0.3 psu, respectively, for waters moving through the Barrow and Herald Canyons. Both estimates are less than 33.1 psu that is typically observed for the cold halostad layer in the Canada Basin, suggesting the importance of diapycnal mixing with saltier Atlantic origin water. Article in Journal/Newspaper Arctic Basin Arctic Bering Strait canada basin Chukchi Chukchi Sea Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Bering Strait Canada Chukchi Sea Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Journal of Geophysical Research: Oceans 116 C7 |
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Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
language |
English |
topic |
452 |
spellingShingle |
452 Kawaguchi, Yusuke Tamura, Takeshi Nishino, Shigeto Kikuchi, Takashi Itoh, Motoyo Mitsudera, Humio Numerical study of winter water formation in the Chukchi Sea : Roles and impacts of coastal polynyas |
topic_facet |
452 |
description |
Winter water formation is examined in the Chukchi Sea for the winters of 1992-2006 using a primitive equation ocean model forced by NCEP wind and surface salinity flux derived from SSM/I thin ice thickness estimates. The model is also forced by an external inflow of 0.8 Sv through the Bering Strait. The model successfully reproduces the oceanic circulation on the Chukchi shelf, thus providing numerous insights into behaviors of salt-enriched water produced on the shelf. The experiments show that under northeasterly winds, northward throughflow across Barrow Canyon is reduced. This results in salinity buildup under freezing conditions and ultimately in greater enhancement of salinity of the waters carried into the Arctic Basin. The flow and salinity enhancement of the flow through Herald Canyon is less extreme but more steady than through Barrow Canyon. Together with moored salinity in the Bering Strait, the model results estimate the actual salinity to be 32.9 ± 0.8 psu and 32.7 ± 0.3 psu, respectively, for waters moving through the Barrow and Herald Canyons. Both estimates are less than 33.1 psu that is typically observed for the cold halostad layer in the Canada Basin, suggesting the importance of diapycnal mixing with saltier Atlantic origin water. |
format |
Article in Journal/Newspaper |
author |
Kawaguchi, Yusuke Tamura, Takeshi Nishino, Shigeto Kikuchi, Takashi Itoh, Motoyo Mitsudera, Humio |
author_facet |
Kawaguchi, Yusuke Tamura, Takeshi Nishino, Shigeto Kikuchi, Takashi Itoh, Motoyo Mitsudera, Humio |
author_sort |
Kawaguchi, Yusuke |
title |
Numerical study of winter water formation in the Chukchi Sea : Roles and impacts of coastal polynyas |
title_short |
Numerical study of winter water formation in the Chukchi Sea : Roles and impacts of coastal polynyas |
title_full |
Numerical study of winter water formation in the Chukchi Sea : Roles and impacts of coastal polynyas |
title_fullStr |
Numerical study of winter water formation in the Chukchi Sea : Roles and impacts of coastal polynyas |
title_full_unstemmed |
Numerical study of winter water formation in the Chukchi Sea : Roles and impacts of coastal polynyas |
title_sort |
numerical study of winter water formation in the chukchi sea : roles and impacts of coastal polynyas |
publisher |
American Geophysical Union |
url |
http://hdl.handle.net/2115/48147 https://doi.org/10.1029/2010JC006606 |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) ENVELOPE(-169.167,-169.167,70.550,70.550) |
geographic |
Arctic Barrow Canyon Bering Strait Canada Chukchi Sea Chukchi Shelf |
geographic_facet |
Arctic Barrow Canyon Bering Strait Canada Chukchi Sea Chukchi Shelf |
genre |
Arctic Basin Arctic Bering Strait canada basin Chukchi Chukchi Sea |
genre_facet |
Arctic Basin Arctic Bering Strait canada basin Chukchi Chukchi Sea |
op_relation |
http://hdl.handle.net/2115/48147 Journal of Geophysical Research, Oceans, 116: C07025 http://dx.doi.org/10.1029/2010JC006606 |
op_rights |
Copyright 2011 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2010JC006606 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
116 |
container_issue |
C7 |
_version_ |
1766303293265412096 |