globalchange  > 气候减缓与适应
DOI: 10.1029/2017JC013307
Scopus记录号: 2-s2.0-85052436292
论文题名:
Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences
作者: Hirano D.; Fukamachi Y.; Ohshima K.I.; Watanabe E.; Mahoney A.R.; Eicken H.; Itoh M.; Simizu D.; Iwamoto K.; Jones J.; Takatsuka T.; Kikuchi T.; Tamura T.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期:8
起始页码: 5688
结束页码: 5705
语种: 英语
英文关键词: Alaskan Coastal Winter Water ; Chukchi Sea ; hybrid coastal polynya ; ocean heat flux ; sea-ice production ; upwelling
英文摘要: 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. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113301
Appears in Collections:气候减缓与适应

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作者单位: Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Arctic Research Center, Hokkaido University, Sapporo, Japan; Global Station for Arctic Research, Hokkaido University, Sapporo, Japan; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, United States; National Institute of Polar Research, Tachikawa, Japan; City of Mombetsu, Mombetsu, Japan; Graduate School of Fisheries Sciences, Hokkaido University, Hakodate, Japan; Department of Polar Science, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies, Tachikawa, Japan; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia

Recommended Citation:
Hirano D.,Fukamachi Y.,Ohshima K.I.,et al. Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(8)
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