Intraseasonal variability in the summer South China Sea: Wind jet, cold filament, and recirculations

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)

	Intraseasonal variability in the summer South China Sea: Wind jet, cold filament, and recirculations
	Xie, SP ; Chang, CH ; Xie, Q ; Wang, DX
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2007
卷号	112 期号:C10 页码:-
ISSN号	0148-0227
中文摘要	[1] A recent study shows that the blockage of the southwest monsoon by the mountain range on the east coast of Indochina triggers a chain of ocean-atmospheric response, including a wind jet and cold filament in the South China Sea (SCS). We extend this climatological analysis by using higher temporal resolution (weekly) to study intraseasonal variability in summer. Our analysis shows that the development of the wind jet and cold filament is not a smooth seasonal process but consists of several intraseasonal events each year at about 45-day intervals. In a typical intraseasonal event, the wind jet intensifies to above 12 m/s, followed in a week by the development of a cold filament advected by an offshore jet east of South Vietnam on the boundary of a double gyre circulation in the ocean. The double gyre circulation itself also strengthens in response to the intraseasonal wind event via Rossby wave adjustment, reaching the maximum strength in 2 to 3 weeks. The intraseasonal cold filaments appear to influence the surface wind, reducing the local wind speed because of the increased static stability in the near-surface atmosphere. To first order, the above sequence of events may be viewed as the SCS response to atmospheric intraseasonal wind pulses, which are part of the planetary-scale boreal summer intraseasonal oscillation characterized by the northeastward propagation of atmospheric deep convection. The intraseasonal anomalies of sea surface temperature and precipitation are in phase over the SCS, suggesting an oceanic feedback onto the atmosphere. As wind variations are now being routinely monitored by satellite, the lags of 1-3 weeks in oceanic response offer useful predictability that may be exploited.
学科主题	Oceanography
收录类别	SCI
原文出处	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000250220000001
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/5855]
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	Xie, SP,Chang, CH,Xie, Q,et al. Intraseasonal variability in the summer South China Sea: Wind jet, cold filament, and recirculations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2007,112(C10):-.
APA	Xie, SP,Chang, CH,Xie, Q,&Wang, DX.(2007).Intraseasonal variability in the summer South China Sea: Wind jet, cold filament, and recirculations.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,112(C10),-.
MLA	Xie, SP,et al."Intraseasonal variability in the summer South China Sea: Wind jet, cold filament, and recirculations".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 112.C10(2007):-.