Bifurcation of Pacific North Equatorial Current at the surface

被引：0
作者：
QingYe Wang
RuiXue Cao
ShuWen Zhang
DunXin Hu
机构：
[1] Guangdong Ocean University,South China Sea Environmental Institute
[2] Institute of Oceanology,Key Laboratory of Ocean Circulation and Waves
[3] Chinese Academy of Sciences,undefined
来源：
Science in China Series D: Earth Sciences | 2009年 / 52卷
关键词：
bifurcation; North Equatorial Current; variation; Empirical Orthogonal Function;
D O I：
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中图分类号：
学科分类号：
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 13.3°N in annual mean state and it lies at the northernmost position (14.0°N) in January, at the southernmost position (12.5°N) in July. The amplitude of variation of bifurcation latitude in a year is 1.5°, which can mainly be explained as the contributions of the signals with periods of about 1 year (1.2°) and 0.5 year (0.3°).
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页码：227 / 231
页数：4
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