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学科主题: Oceanography
题名: Intraseasonal variability in the summer South China Sea: Wind jet, cold filament, and recirculations
作者: Xie, SP ; Chang, CH ; Xie, Q ; Wang, DX
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
发表日期: 2007
卷: 112, 期:C10, 页:-
收录类别: sci
部门归属: Univ Hawaii, Int Pacific Res Ctr, Honolulu, HI 96822 USA; Univ Hawaii, Dept Meteorol, Honolulu, HI 96822 USA; Chinese Acad Sci, S China Sea Inst Oceanol, Lab Trop Marine Environm Dynam, Guangzhou 510301, Peoples R China
项目归属: LED
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.
原文出处: 查看原文
WOS记录号: WOS:000250220000001
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5855
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:
Xie, SP; Chang, CH; Xie, Q; Wang, DX.Intraseasonal variability in the summer South China Sea: Wind jet, cold filament, and recirculations,JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2007,112(C10):-
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