文献类型：期刊文献

英文题名：Bifurcation of Pacific North Equatorial Current at the surface

作者：Wang QingYe[1];Cao RuiXue[1];Zhang ShuWen[1];Hu DunXin[2]

机构：[1]Guangdong Ocean Univ, S China Sea Environm Inst, Zhanjiang 524088, Peoples R China;[2]Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China

年份：2009

卷号：52

期号：2

起止页码：227

外文期刊名：SCIENCE IN CHINA SERIES D-EARTH SCIENCES

收录：SCI-EXPANDED(收录号：WOS:000262684300008)、、EI(收录号：20090611899239)、Scopus(收录号：2-s2.0-59149089155)、WOS

基金：Supported by National Basic Research Program of China (Grant No. 2007CB411802), National Natural Science Foundation of China (Grant Nos. 40806012, 40876013), Open Fund of the Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences (Grant No. KLOCAW0803) and Scientific Research Foundation for Talent, Guangdong Ocean University (Grant No. E06118)

语种：英文

外文关键词：bifurcation; North Equatorial Current; variation; Empirical Orthogonal Function

外文摘要：The grid altimetry data between 1993 and 2006 near the Philippines were analyzed by the method of Empirical Orthogonal Function (EOF) to study the variation of bifurcation of the North Equatorial Current at the surface of the Pacific. The relatively short-term signals with periods of about 6 months, 4 months, 3 months and 2 months are found besides seasonal and interannual variations mentioned in previous studies. Local wind stress curl plays an important role in controlling variation of bifurcation latitude except in the interannual timescale. The bifurcation latitude is about 13.3A degrees N in annual mean state and it lies at the northernmost position (14.0A degrees N) in January, at the southernmost position (12.5A degrees N) in July. The amplitude of variation of bifurcation latitude in a year is 1.5A degrees, which can mainly be explained as the contributions of the signals with periods of about 1 year (1.2A degrees) and 0.5 year (0.3A degrees).