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学科主题: Oceanography
题名: A model study of the summer southeast Vietnam offshore current in the southern south China sea
作者: Cai, SQ ; Long, XM ; Wang, SN
通讯作者: caisq@scsio.ac.cn
关键词: western boundary current ; offshore current ; numerical modeling ; summer monsoon ; south China sea
刊名: CONTINENTAL SHELF RESEARCH
发表日期: 2007
卷: 27, 期:18, 页:2357-2372
收录类别: sci
部门归属: Chinese Acad Sci, LED, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
项目归属: LED
摘要: The western boundary current in the southern South China Sea (SCS) in summer does not always flow northward along the Indo-China Peninsula, it leaves the southeast coast of peninsula around 10-14 degrees N, forming a strong eastward jet called "Vietnam Coastal Current" or "Southeast Vietnam Offshore Current" (SVOC). It is known that the wind stress curl is the major driving factor responsible for this current. In this paper, we carry on the study of the separation position, strength and forming time of this current. A connected si ngle-layer/two-layer model is employed here to study these problems. According to the numerical experiments and analyses of the vorticity dynamics, it is found that, the local wind stress curl (including the northern cyclonic and the southern anticyclonic wind forcing curl), the nonlinear term, the topographic effect, the planetary vorticity advection and the water exchange between the SCS and Java Sea via the Sunda Shelf have an important effect on both the position where this current leaves the coast and its strength; when there is an inflow via the Sunda Shelf, the current is stronger and the separation position is more northward; whereas the water stratification, the coastline and the inflow of Kuroshio have little effect on its separation. In fact, two opposite flowing currents, the northward SVOC and the southward western branch of the cyclonic eddy to its north near the Indo-China Peninsula, collide with each other, and the strength of these two currents determine the separation position of the SVOC. Origin of the SVOC may be driven by the local negative wind stress curl in the middle SCS in mid-spring, this current flows along the coast of the Indo-China Peninsula and leaves the coast at high latitude, flowing northeastward; once the local positive wind stress curl near the northern Indo-China Peninsula or the negative one near the southern Indo-China Peninsula is large enough, this current will begin to leave the coast at low latitude. (C) 2007 Elsevier Ltd. All rights reserved.
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WOS记录号: WOS:000250912300006
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5851
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Cai, SQ; Long, XM; Wang, SN.A model study of the summer southeast Vietnam offshore current in the southern south China sea,CONTINENTAL SHELF RESEARCH,2007,27(18):2357-2372
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