摘要
首先采用EOF方法分析了中国夏季降水的主要特征 ,其第一 (EOF1 )和第二 (EOF2 )特征向量及其时间序列 (EOF1 - T、EOF2 T)基本上反映了中国夏季 1 (或 3)类和 2类主要雨型的空间和时间分布 ;进一步建立了EOF1、EOF2及其对应的时间序列EOF1 - T、EOF2- T与季风指数的关联 ,以及中国夏季主要雨型与季风指数直接的关联。结果表明 :各季风指数都对中国夏季的 1类雨型有较好的反映能力 ,都对 2类雨型无反映能力 ,仅学者施能定义的指数对 3类雨型有一定的反映能力。
The characteristics of China summer precipitation percentage anomalies are analyzed by the method of empirical orthogonal function (EOF). It is found that the main modes of EOF1 and EOF2 and their time coefficients mainly reflect spatial and temporal variation characteristics of China summer main precipitation patterns, respectively. Then the correlation between several indices of Asia monsoon and time coefficients of EOF1 and EOF2, and the direct correlation between several indices of Asia monsoon and China summer main precipitation patterns are analyzed. The results show that all indices of Asia monsoon have capability to reflect the first pattern, and all haven't capability of reflection of the second pattern, only the index defined by Shi Neng has some capability to reflect the third pattern of China summer main precipitation patterns.
出处
《应用气象学报》
CSCD
北大核心
2005年第B03期70-76,共7页
Journal of Applied Meteorological Science
基金
国家"九五"重中之重项目"短期气候预测系统的总装与业务化试验研究"课题 (96 90 8 0 6)
"东亚季风监测诊断方法研究"项目共同资助。
