太平洋海温演变的时空结构

北京大学学报（自然科学版）

太平洋海温演变的时空结构

王在文,李晓东

北京大学地球物理系，北京，100871

收稿日期:2001-06-15 出版日期:2002-05-20 发布日期:2002-05-20

The Spatio-Temporal Evolvement of Pacific SSTA

WANG Zaiwen，LI Xiaodong

The Geophysics Department of Peking University, 100871

Received:2001-06-15 Online:2002-05-20 Published:2002-05-20

摘要/Abstract

摘要： 运用转动复自然正交展开(RCEOF)分析近50年太平洋海温场的时空结构，得出在赤道中、东太平洋和40°N 附近有两个海温异常强信号中心；赤道东海岸太平洋海温异常信号(对应ENSO信号)在几个月到半年左右传播到赤道西太平洋；海温主要周期大部分落在3～10d的范围内，还存在年和准两年变化。

关键词: SSTA, RCEOF, 时空结构

Abstract: With the Rotational Complex Empirical Orthogonal Function (RCEOF), we analyzed the spatio-temporal Evolvement of the latest fifty years SSTA of Pacific Ocean. Came to a result that there are two strong signal center: One at middle and east Pacific Ocean near equator, the other at 40°N. It will take several months to half a year for the signal to reach West Pacific Ocean from east coast of Pacific Ocean near equator (correspond to ENSO). Most cycles of SSTA are in three to ten years, and there are annual and biyearly cycles too.

Key words: SSTA, RCEOF, spatio-temporal

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