南海海面高度年际变化的s-eof分析-jtoaccn.pdf

南海海面高度年际变化的s-eof分析-jtoaccn.pdf

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南海海面高度年际变化的s-eof分析-jtoaccn

热带海洋学报 JOURNAL OF TROPICAL OCEANOGRAPHY 2010 年 第 29 卷 第 4 期:8−13 海洋水文学 ; S-EOF 1,2 1 丘福文 , 方文东 (1. , 510301; 2. , 100049) : (S-EOF), 15a S-EOF , , (), S-EOF1 , , ENSO ; S-EOF2 , ; S-EOF3 , 1997/1998 : ; ; S-EOF 中图分类号: P731 文献标识码: A 文章编号: 1009-5470(2010)04-0008-06 Analysis of interannual variability of sea-surface height in the South China Sea QIU Fu-wen1,2, FANG Wen-dong1 (1.South China Sea Institute of Oceanology, CAS, Guangzhou 510301, China ; 2. Graduate University of CAS, Beijing 100039, China) Abstract: Fifteen years of interannual variability of the sea-surface height in the South China Sea (SCS) was discussed through the Seasonal-reliant Empirical Orthogonal Function (S-EOF) analysis. The S-EOF analysis illustrates spatial patterns of different seasons and the same temporal variations of the surface circulation in the SCS, not only confirming the winter and summer patterns during monsoons but also presenting new patterns in spring and fall. The result shows that the interannual variability of the sea-surface height in the SCS was closely related to the El Niño and La Niña events. The S-EOF1 shows that the variability of the sea-surface height in the SCS had obvious seasonal oscillation, and this seasonal oscillation was almost steady and relatively weaker during ENSO years. The S-EOF2 shows that there existed a comparatively strong positive anom- aly west of the Luzon in the winters of 1998−2001, and it lasted until the spring. The S-EOF3 is mainly characterized by the interannual variability of a series of meso-scale eddies in

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