Statistical analysis of surface hydrography and circulation variations in northern South China Sea

Statistical analysis of surface hydrography and circulation variations in northern South China Sea

佚名

【期刊名称】《中国海洋湖沼学报（英文版）》 【年(卷),期】2005(023)004

【摘要】To study the variations in surface hydrography and circulation in northern South China Sea (NSCS), rotated empirical orthogonal function (REOF) and extended associate pattern analysis (EAPA) are used with daily sea surface salinity (SSS), sea surface temperature (SST) and sea surface height (SSH) datasets covering 1 126 days from American Navy Experimental Real-Time East Asian Seas Ocean Nowcast System in this paper. Results show that in summer, the SCS Diluted Water Expansion (SDWE) is the most dominant factor controlling SSS variations in the NSCS. The remarkable SDWE usually begins in early July, reaches its maximum in middle August and weakens in late September. In summer flourishing period, its low saline core is just limited between 21°N and 22°N because of strong surface anomalous anticyclonic circulation in the NSCS. In early or late stage, the anomalous anticyclonic circulation becomes weak or turns into cyclonic one, thus the weak SCS diluted water can disperse. And its influence on the SSS variations has obviously decreased. The Kuroshio intrusion is the second controlling factor, and it has the almost opposite seasonal or

intraseasonal oscillations and spatial characteristics to the SDWE. Winter Kuroshio Intrusion (WKI) begins in early November and lasts about three months.Intraseasonal Kuroshio Intrusion (IKI) takes place at any seasons. The westward Ekman transport produced by the north anomaly of East Asia Monsoon (EAM) pushes warmer and more saline seawater into the NSCS through the Bashi Strait and seems to decide the intensity of seasonal and intraseasonal Kuroshio intrusions. 【总页数】10页(383-392)

【关键词】variations;SCS diluted water expansion (SDWE);intraseasonal Kuroshio

intrusion

(IKI);winterKuroshio

intrusion

(WKI);empirical

orthogonal function (REOF);extended associate pattern analysis (EAPA) 【作者】佚名

【作者单位】Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;The Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Marine Science and Numerical Modeling of SOA, Qingdao 266061, China 【正文语种】中文 【中图分类】P7 【文献来源】

https://www.zhangqiaokeyan.com/academic-journal-cn_chinese-journal-oceanic-limnology-english-edition_thesis/0201252508416.html

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