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学科主题: Oceanography
题名: A gap in the Indo-Pacific warm pool over the South China Sea in boreal winter: Seasonal development and interannual variability
作者: Liu, QY ; Jiang, X ; Xie, SP ; Liu, WT
通讯作者: liuqy@ouc.edu.cn ; xie@hawaii.edu ; liu@pacific.jpl.nasa.gov
关键词: Indo-Pacific warm pool ; South China Sea ; cold tongue
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
发表日期: 2004-01-01
卷: 109, 期:C7, 页:#NAME
收录类别: sci
部门归属: Ocean Univ China, Phys Oceanog Lab, Qingdao 2666003, Peoples R China; Ocean Univ China, Ocean Atmosphere Interact & Climate Lab, Qingdao 2666003, Peoples R China; CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA; Univ Hawaii, SOEST, Int Pacific Res Ctr, Honolulu, HI 96822 USA; Univ Hawaii, Dept Meteorol, Honolulu, HI 96822 USA
摘要: [1] The Indo-Pacific warm water pool in boreal winter shows a conspicuous gap over the South China Sea (SCS) where sea surface temperature (SST) is considerably lower than over the oceans both to the west and east. The formation mechanisms for the climatology and interannual variability of SCS SST in boreal winter are investigated using a suite of new satellite measurements. The winter SCS is divided into two parts by the axis of the maximum northeasterly monsoonal winds. The positive wind curl in the southeastern half of the ocean drives a cyclonic gyre circulation in the deep basin. As its western boundary current, an intense southward flow is found south of Vietnam on the continental slope separating the Sunda Shelf to the west and the deep SCS basin to the east. This slope current exceeds 0.5 m s(-1) in speed and advects cold water from the north. This cold advection results in a distinct cold tongue in the winter SST climatology. Both the slope current and the cold tongue are strongest in November to February. This winter cold tongue displays considerable interannual variability that is highly correlated with eastern equatorial Pacific SST. In an El Nino the winter monsoon weakens, causing the SCS ocean circulation to spin down. The reduced western boundary current and its thermal advection result in a warming in the SCS winter cold tongue. Both SST variance and its correlation with the El Nino-Southern Oscillation peak along the climatological cold tongue indicate that ocean dynamics are an important player in SCS climate variability.
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/8485
Appears in Collections:海洋科技动态信息-印太暖池系统研究_期刊论文

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Liu, QY; Jiang, X; Xie, SP; Liu, WT.A gap in the Indo-Pacific warm pool over the South China Sea in boreal winter: Seasonal development and interannual variability,JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2004,109(C7):#NAME
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