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学科主题: Meteorology & Atmospheric Sciences
题名: Sensitivity Study of the Seasonal Mean Circulation in the Northern South China Sea
作者: Bo, H ; Wang, DX
通讯作者: hongbo@scsio.ac.cn
关键词: northern South China Sea ; circulation ; wind forcing ; Kuroshio intrusion ; bottom topography
刊名: ADVANCES IN ATMOSPHERIC SCIENCES
发表日期: 2008
卷: 25, 期:5, 页:824-840
收录类别: sci
部门归属: [Bo, Hong; Wang Dongxiao] Chinese Acad Sci, S China Sea Inst Oceanol, Lab Trop Marine Environm Dynam, Guangzhou 510301, Guangdong, Peoples R China
项目归属: LED
摘要: A study of the circulation in the northern South China Sea (SCS) is carried out with the aid of a three-dimensional, high-resolution regional ocean model. One control and two sensitivity experiments are performed to qualitatively investigate the effects of surface wind forcing, Kuroshio intrusion, and bottom topographic influence on the circulation in the northern SCS. The model results show that a branch of the Kuroshio in the upper layer can intrude into the SCS and have direct influence on the circulation over the continental shelf break in the northern SCS. There are strong southward pressure gradients along a zonal belt largely seaward of the continental slope. The pressure gradients are opposite in the southern and northern parts of the Luzon Strait, indicating inflow and outflow through the strait, respectively. The sensitivity experiments suggest that the Kuroshio intrusion is responsible for generating the imposed pressure head along the shelf break and has no obvious seasonal variations. The lateral forcing through the Luzon Strait and Taiwan Strait can induce the southwestward slope current and the northeastward SCS Warm Current in the northern SCS. Without the lateral forcing, there is no high-pressure-gradient zonal belt seaward of the continental slope. The wind forcing mainly causes the seasonal variation of the circulation in the SCS. The wind-induced water pile-up results in the southward high pressure gradient along the northwestern boundary of the basin. Without the blocking of the plateau around Dongsha Islands, the intruded Kuroshio tends to extend northwest and the SCS branch of the Kuroshio becomes wider and stronger. The analyses presented here are qualitative in nature but should lead to a better understanding of the oceanic responses in the northern SCS to these external influence factors.
原文出处: 查看原文
WOS记录号: WOS:000259995200013
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5953
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:
Bo, H; Wang, DX.Sensitivity Study of the Seasonal Mean Circulation in the Northern South China Sea,ADVANCES IN ATMOSPHERIC SCIENCES,2008,25(5):824-840
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