相空间EOF方法及其在气候诊断中的应用

A Phase Space EOF Method and Its Application to Climate Diagnosis

提出了相空间EOF新方法 ,由此研究了四川测站降水和温度的气候变化。结果表明 :突变性是气候变化最重要的特征 ,周期性是第二位的 ;突变在气候变化的高层次上有显著反映 ,低层次对突变具有反馈作用 ,正 (负 )反馈作用突出 (掩盖 )气候变化的突变性 ;并且在气候诊断分析中 。

According to the phase space technique and Empirical Orthogonal Function(EOF) analysis, a new method of phase space EOF analysis was presented and it is used. the variation of precipitation and temperature was investigated in Sichuan. The results show that the jump is the most important characteristic for climate change and the periodicity is secondary. There is obvious jump at higher climatic hierarchy and lower climatic hierarchy can feeds back to the climatic jump. The positive (negative) feedback highlight(conceal) the climatic jump. In climatic diagnosis and analysis, this is a distinctive method.