Sensitivity Study of the Seasonal Mean Circulation in the Northern South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Sensitivity Study of the Seasonal Mean Circulation in the Northern South China Sea
	Bo, H ; Wang, DX
刊名	ADVANCES IN ATMOSPHERIC SCIENCES
	2008
卷号	25 期号:5 页码:824-840
关键词	northern South China Sea circulation wind forcing Kuroshio intrusion bottom topography
ISSN号	0256-1530
通讯作者	hongbo@scsio.ac.cn
中文摘要	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.
学科主题	Meteorology & Atmospheric Sciences
收录类别	SCI
原文出处	SEP
WOS记录号	WOS:000259995200013
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/5953]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Bo, H,Wang, DX. Sensitivity Study of the Seasonal Mean Circulation in the Northern South China Sea[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2008,25(5):824-840.
APA	Bo, H,&Wang, DX.(2008).Sensitivity Study of the Seasonal Mean Circulation in the Northern South China Sea.ADVANCES IN ATMOSPHERIC SCIENCES,25(5),824-840.
MLA	Bo, H,et al."Sensitivity Study of the Seasonal Mean Circulation in the Northern South China Sea".ADVANCES IN ATMOSPHERIC SCIENCES 25.5(2008):824-840.