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学科主题: Oceanography
题名: The calculation of the circulation in South China Sea by a diagnostic model
作者: Zhou, WD ; Yang, Y ; Dong, DP
通讯作者: wdzhou@scsio.ac.cn
关键词: diagnostic model ; South China Sea ; potential vorticity ; circulation
刊名: ACTA OCEANOLOGICA SINICA
发表日期: 2008
卷: 27, 页:31-45
收录类别: sci
部门归属: [Zhou Weidong; Yang Yang; Dong Danpeng] Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
项目归属: LED
摘要: A high resolved two - dimensional linear global diagnostic model combining with the dynamical calculation is used to calculate velocity field in the South China Sea(SCS). The study of model results shows that eddy diffusion does not change basic structure of circulation in the SCS and does not change the direction of invasive water, but changes the value of transport considerably especially in straits. The velocity field is not changed whether the wind stress is considered or not. This result shows the circulation is largely deter-mined by a density field which well records most of the important contribution of the wind stress effect. Potential vorticity is calculated to testify the dynamics of the model results. The result shows that a good. conservation of the nonlinear PV. This indicates most effects of the important nonlinear processes are well recorded in density and the nonlinear term is negligible so that the simplified model is reliable. The model results show the water exchanges between the SCS and open ocean or surrounding seas. Cold deep water invades through Luzon Strait and Warm shallow water is pushed out mainly through Karimata Straits. The model results also reveal the structure of the circulation in the SCS basin. In two circulations of upper and middle layers, a cyclonic one in the north and an anti-cyclonic one in the south, reflect the climatologic average of the circulation driven by monsoon. In the deep or bottom layer, these two circulations reflect the topography of the basin. Above the middle layer, invasive water enters westward in the north but the way of invasion of Kuroshio is not clear. Below the deep layer, a current goes down south near the east basin and invasive water enters in the basin from the west Pacific.
WOS记录号: WOS:000258999200004
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5969
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Recommended Citation:
Zhou, WD; Yang, Y; Dong, DP.The calculation of the circulation in South China Sea by a diagnostic model,ACTA OCEANOLOGICA SINICA,2008,27():31-45
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