【摘要】 对 1 961～ 2 0 0 0年长江中下游沿江地区 8个站夏季 (6～ 8月 )累积降水距平进行EOF分析 ,根据前三个特征向量将长江中下游沿江地区旱涝趋势异常分成 4种主要空间型 :旱型、涝型、东旱西涝型、东涝西旱型。并在此基础上 ,分析了它们与 50 0hPa高度场异常的同时、时滞关系 ,得到一些对长江中下游沿江地区汛期旱涝异常预测有意义的结果。更多还原

【Abstract】 Based on the EOF analysis of summer precipitation of eight stations in the middle and lower reaches of the Changjiang River from 1961 to 2000, four patterns are named according to the first three eigenvectors. Moreover, the 500 hPa height departure in the same and preceding months are analyzed. Some useful relations for the summer precipitation prediction are obtained.更多还原