Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences
Water properties and formation processes of Alaskan Coastal Winter Water (ACWW) over the eastern Chukchi shelf along the Alaska coast, the so-called Barrow Canyon pathway, are examined using data from moorings, atmospheric reanalysis, satellite-derived sea-ice production (SIP), and a numerical trace...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | http://hdl.handle.net/2115/72737 https://doi.org/10.1029/2017JC013307 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/72737 2023-05-15T13:15:05+02:00 Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences Hirano, Daisuke Fukamachi, Yasushi Ohshima, Kay I Watanabe, Eiji Mahoney, Andrew R. Eicken, Hajo Itoh, Motoyo Simizu, Daisuke Iwamoto, Katsushi Jones, Joshua Takatsuka, Toru Kikuchi, Takashi Tamura, Takeshi http://hdl.handle.net/2115/72737 https://doi.org/10.1029/2017JC013307 eng eng American Geophysical Union http://hdl.handle.net/2115/72737 Journal of Geophysical Research: Oceans, 123(8): 5688-5705 http://dx.doi.org/10.1029/2017JC013307 Copyright 2018 American Geophysical Union. Alaskan Coastal Winter Water hybrid coastal polynya sea-ice production upwelling ocean heat flux Chukchi Sea 452 article fthokunivhus https://doi.org/10.1029/2017JC013307 2022-11-18T01:05:10Z Water properties and formation processes of Alaskan Coastal Winter Water (ACWW) over the eastern Chukchi shelf along the Alaska coast, the so-called Barrow Canyon pathway, are examined using data from moorings, atmospheric reanalysis, satellite-derived sea-ice production (SIP), and a numerical tracer experiment. Along this pathway, Pacific Winter Water (PWW) can be modified to produce ACWW through SIP accompanied by production of cold, saline polynya water in the coastal polynyas, upwelling of warm Atlantic Water (AW), and mixing processes on the shelf. Three different types of ACWW are formed: (i) a mixture of AW and PWW, (ii) a mixture of AW and polynya water, and (iii) hypersaline polynya water. The northeasterly winds, correlated with the north-south atmospheric pressure gradient between Beaufort High and Aleutian Low, are common triggers of polynya SIP episodes and AW upwelling in the Barrow Coastal Polynya (BCP). Due to the dual impact of northeasterly winds, PWW modification processes in the BCP are more complicated than what occurs elsewhere in the Chukchi Polynya. The impact of AW upwelling on the ACWW formation is most prominent in the BCP, usually centered along the coast. All types of ACWW are thought to be basically transported westward or northwestward with the Chukchi slope current and/or Beaufort Gyre and finally contribute to maintenance of the lower halocline layer especially over the Chukchi Borderland, Northwind Ridge, and southern Canada Basin. Even in the Pacific sector of the Arctic Ocean, ACWW properties are strongly influenced by both Atlantic-origin and Pacific-origin waters. Article in Journal/Newspaper aleutian low Arctic Arctic Ocean Barrow canada basin Chukchi Chukchi Sea Sea ice Alaska Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Arctic Ocean Chukchi Sea Canada Pacific Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Chukchi Borderland ENVELOPE(-165.000,-165.000,77.000,77.000) Journal of Geophysical Research: Oceans 123 8 5688 5705 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Alaskan Coastal Winter Water hybrid coastal polynya sea-ice production upwelling ocean heat flux Chukchi Sea 452 |
spellingShingle |
Alaskan Coastal Winter Water hybrid coastal polynya sea-ice production upwelling ocean heat flux Chukchi Sea 452 Hirano, Daisuke Fukamachi, Yasushi Ohshima, Kay I Watanabe, Eiji Mahoney, Andrew R. Eicken, Hajo Itoh, Motoyo Simizu, Daisuke Iwamoto, Katsushi Jones, Joshua Takatsuka, Toru Kikuchi, Takashi Tamura, Takeshi Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences |
topic_facet |
Alaskan Coastal Winter Water hybrid coastal polynya sea-ice production upwelling ocean heat flux Chukchi Sea 452 |
description |
Water properties and formation processes of Alaskan Coastal Winter Water (ACWW) over the eastern Chukchi shelf along the Alaska coast, the so-called Barrow Canyon pathway, are examined using data from moorings, atmospheric reanalysis, satellite-derived sea-ice production (SIP), and a numerical tracer experiment. Along this pathway, Pacific Winter Water (PWW) can be modified to produce ACWW through SIP accompanied by production of cold, saline polynya water in the coastal polynyas, upwelling of warm Atlantic Water (AW), and mixing processes on the shelf. Three different types of ACWW are formed: (i) a mixture of AW and PWW, (ii) a mixture of AW and polynya water, and (iii) hypersaline polynya water. The northeasterly winds, correlated with the north-south atmospheric pressure gradient between Beaufort High and Aleutian Low, are common triggers of polynya SIP episodes and AW upwelling in the Barrow Coastal Polynya (BCP). Due to the dual impact of northeasterly winds, PWW modification processes in the BCP are more complicated than what occurs elsewhere in the Chukchi Polynya. The impact of AW upwelling on the ACWW formation is most prominent in the BCP, usually centered along the coast. All types of ACWW are thought to be basically transported westward or northwestward with the Chukchi slope current and/or Beaufort Gyre and finally contribute to maintenance of the lower halocline layer especially over the Chukchi Borderland, Northwind Ridge, and southern Canada Basin. Even in the Pacific sector of the Arctic Ocean, ACWW properties are strongly influenced by both Atlantic-origin and Pacific-origin waters. |
format |
Article in Journal/Newspaper |
author |
Hirano, Daisuke Fukamachi, Yasushi Ohshima, Kay I Watanabe, Eiji Mahoney, Andrew R. Eicken, Hajo Itoh, Motoyo Simizu, Daisuke Iwamoto, Katsushi Jones, Joshua Takatsuka, Toru Kikuchi, Takashi Tamura, Takeshi |
author_facet |
Hirano, Daisuke Fukamachi, Yasushi Ohshima, Kay I Watanabe, Eiji Mahoney, Andrew R. Eicken, Hajo Itoh, Motoyo Simizu, Daisuke Iwamoto, Katsushi Jones, Joshua Takatsuka, Toru Kikuchi, Takashi Tamura, Takeshi |
author_sort |
Hirano, Daisuke |
title |
Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences |
title_short |
Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences |
title_full |
Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences |
title_fullStr |
Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences |
title_full_unstemmed |
Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences |
title_sort |
winter water formation in coastal polynyas of the eastern chukchi shelf: pacific and atlantic influences |
publisher |
American Geophysical Union |
url |
http://hdl.handle.net/2115/72737 https://doi.org/10.1029/2017JC013307 |
long_lat |
ENVELOPE(-169.167,-169.167,70.550,70.550) ENVELOPE(-154.000,-154.000,72.500,72.500) ENVELOPE(-165.000,-165.000,77.000,77.000) |
geographic |
Arctic Arctic Ocean Chukchi Sea Canada Pacific Chukchi Shelf Barrow Canyon Chukchi Borderland |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Canada Pacific Chukchi Shelf Barrow Canyon Chukchi Borderland |
genre |
aleutian low Arctic Arctic Ocean Barrow canada basin Chukchi Chukchi Sea Sea ice Alaska |
genre_facet |
aleutian low Arctic Arctic Ocean Barrow canada basin Chukchi Chukchi Sea Sea ice Alaska |
op_relation |
http://hdl.handle.net/2115/72737 Journal of Geophysical Research: Oceans, 123(8): 5688-5705 http://dx.doi.org/10.1029/2017JC013307 |
op_rights |
Copyright 2018 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2017JC013307 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
8 |
container_start_page |
5688 |
op_container_end_page |
5705 |
_version_ |
1766266866951520256 |