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学科主题: Meteorology & Atmospheric Sciences; Oceanography
题名: Observations of Freshening in the Northwest Pacific Subtropical Gyre near Luzon Strait
作者: Yan, YF ; Xu, DZ ; Qi, YQ ; Gan, ZJ
通讯作者: xudazhi@scsio.ac.cn
关键词: Argo ; upper ocean ; freshening ; Northwest Pacific
刊名: ATMOSPHERE-OCEAN
发表日期: 2012
卷: 50, 页:92-102
部门归属: [Yan, Youfang; Xu, Dazhi; Qi, Yiquan; Gan, Zijun] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China; [Xu, Dazhi] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
项目归属: LTO
摘要: Argo observations reveal that the salinity in the North Pacific subtropical gyre near Luzon Strait gradually declined by 0.2 (practical salinity scale used) from 2003 to 2007 over a depth range of 100 m to 200 m. Such freshening is also found in the outputs of the Estimating the Circulation and Climate of the Ocean (ECCO) model. The possible mechanisms for the freshening are investigated using the surface freshwater flux (E-P) data, the ECCO outputs and a salt budget equation for the upper ocean. Our analysis indicates that the magnitude of the salinity change caused by the surface freshwater flux anomaly is far smaller than observed, suggesting that the surface freshwater flux anomaly is not sufficient to account for the observed freshening. In fact, the salinity anomaly is closely linked to a pronounced freshening at the northeast corner of the study area from 2003 to 2007. The advection of salinity anomalies in the western North Pacific Ocean between 25 degrees N and 35 degrees N via a southwestward flow in the "C-shaped" region associated with the Kuroshio system is the main mechanism responsible for the observed freshening in the study area.
语种: 英语
WOS记录号: WOS:000311779300008
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10225
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Recommended Citation:
Yan, YF; Xu, DZ; Qi, YQ; Gan, ZJ.Observations of Freshening in the Northwest Pacific Subtropical Gyre near Luzon Strait,ATMOSPHERE-OCEAN,2012,50():92-102
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