摘要
用１９５１～１９９２年３１个站的降水资料，作自然正交分解研究了近４２年汛期降水（４～９月）变化异常的时空分布，得到３种降水型。在此基础上通过相关函数和谱分析讨论了副高强度、副高强度、副高面积指数、副高西伸脊点、南方涛动指数。
In this paper,using the precipitation data acquired from 31 stations,the spatial and temporal distribution of the abnormal precipitation of the flood period(from April to September) in 42 years (1951～1992) were analysed by the Empirical Orthogonal Function (EOF).It is shown that there are three rainfall types.And then,the effect and mode of the flood period,precipitation and the rainfall types in Southwest China,the intensity of subtropical high,western ridge point of subtropical high,western ridge point of subtropical high,southern oscillation index,plateau heating index were analysed and discussed by using the correlation function and spectrum analysis.
关键词
汛期
降水异常
南方涛动
影响因子
降水
Abnormal precipitation of the flood period
Subtropical High
Southern oscillation
Plateau heating index
Modificational factor.
