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中文摘要: 利用NCEP/NCAR提供的1950～1999年4～6月逐日再分析资料,通过奇异值分解、子波变换等方法分析了华南前汛期降水与500hPa位势高度场耦合关系的多时间尺度特征。结果表明:华南前汛期降水和500hPa位势高度场相互耦合的空间分布型、季节内变化存在明显的年际差异,具有多层次、多时间尺度特征;华南前汛期降水和高度场耦合相关型许多一致的年际、年代际周期表明两者长期变化的耦合关系密切;另外,两者的年代际突变都十分显著。
Abstract:With the SVD(Singular Value Decomposition), wavelet transform, the multiple temporal scale feature of coupling relationship between rainfalls in the first flood season in South China and 500hPa geopotential height is investigated. Results indicate that rainfall-height coupled mode appears pronounced interannual difference, and various periodic variability. Characterized by the multiple level and multiple temporal scale, a lot of coincident periods between rainfall and Height field indicate the closed couple relationship between them, besides, they all appear decadal abrupt.
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黄晓东,郑伟杰,2005.华南前汛期降水与500hPa高度场耦合关系特征[J].气象,31(10):35-38.
,2005.Multiple Temporal Scale Feature of Coupled Relationship between Rainfall in First Flood Season of South China and 500hPa Height[J].Meteor Mon,31(10):35-38.
黄晓东,郑伟杰,2005.华南前汛期降水与500hPa高度场耦合关系特征[J].气象,31(10):35-38.
,2005.Multiple Temporal Scale Feature of Coupled Relationship between Rainfall in First Flood Season of South China and 500hPa Height[J].Meteor Mon,31(10):35-38.