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南海表层水温低频振荡的基本特征
于慎余, 周发琇, 傅刚, 王东晓
青岛海洋大学海洋气象系 青岛 266003
摘要:
使用1958－1987年COADS资料对南海全区表层水温做了分析。结果发现，南海表层水温存在20－40个月的低频振荡，其中以准两年周期最显著，，其次是3－4年．这种振荡主要发生在深水海盆区，并且与季风异常有着十分密切的关系。
关键词:  南海水温  低频振荡  季风异常
DOI：
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基金项目:国家自然科学基金资助，49176251号
BASIC FEATURES OF THE SST LOW FREQUENCY OSCILLATION IN THE SOUTH CHINA SEA
Yu Shenyu, Zhou Faxiu, Fu Gang, Wang Dongxiao
Department of Marine Meteorology, Ocean University of Qingdao, Qingdao 266003
Abstract:
Analyses of the basic features of the South China Sea’s interannual low frequency SST oscillations by using the 1958 - 1987 COADS data set, empirical orthogonal function, spectrum, digital filter, etc. show that:

1) There are SST low frequency oscillations of 20 - 40 months, the most remarkable being the quasi-biennial oscillations, then those with the 3 - 4 year period.

2) These oscillations /generate in the deep water basin and are quite different from seasonal variances .

3) There is almost no propagation of SST oscillation, which implies a fast SST adjustment forced by wind anomalies.

4) The SST oscillations are closely related to the V-component of the wind anomalies.
Key words:  South China Sea SST, Low frequency oscillation, Monsoon anomaly
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