Observations of Freshening in the Northwest Pacific Subtropical Gyre near Luzon Strait
Yan, YF; Xu, DZ; Qi, YQ; Gan, ZJ; xudazhi@scsio.ac.cn
2012
发表期刊ATMOSPHERE-OCEAN
ISSN0705-5900
卷号50页码:92-102
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.
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
关键词Argo Upper Ocean Freshening Northwest Pacific
学科领域Meteorology & Atmospheric Sciences ; Oceanography
语种英语
资助项目LTO
WOS记录号WOS:000311779300008
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10225
专题热带海洋环境国家重点实验室(LTO)
通讯作者xudazhi@scsio.ac.cn
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Yan, YF,Xu, DZ,Qi, YQ,et al. Observations of Freshening in the Northwest Pacific Subtropical Gyre near Luzon Strait[J]. ATMOSPHERE-OCEAN,2012,50:92-102.
APA Yan, YF,Xu, DZ,Qi, YQ,Gan, ZJ,&xudazhi@scsio.ac.cn.(2012).Observations of Freshening in the Northwest Pacific Subtropical Gyre near Luzon Strait.ATMOSPHERE-OCEAN,50,92-102.
MLA Yan, YF,et al."Observations of Freshening in the Northwest Pacific Subtropical Gyre near Luzon Strait".ATMOSPHERE-OCEAN 50(2012):92-102.
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