Linear relationship between the interdecadal and interannual variabilities of North China rainfall in rainy season  

作　　者：LU Riyu Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100080, China 

出　　处：《Chinese Science Bulletin》2003年第10期1040-1044,共5页

基　　金：supported by the Key Project of the Chinese Academy of Sciences(Grant No.KZCX2-203);the National Natural Science Foundation of China(Grant Nos.40075016 and 40023001).

摘　　要：Interdecadal and interannual timescales are dominant in the North China rainfall in rainy season (July and August). On the interdecadal timescale, the North China rainfall exhibited an abrupt decrease at the end of 1970s. In this study, we examined the effect of this abrupt rainfall decrease on the association between rainfall and circulation on the interannual timescale, and found that the interdecadal variation does not change the physical mechanism responsible for the interannual variation of North China rainfall. There is a linear relationship between the interdecadal and interannual variabilities of North China rainfall in rainy season.Interdecadal and interannual timescales are dominant in the North China rainfall in rainy season (July and August). On the interdecadal timescale, the North China rainfall exhibited an abrupt decrease at the end of 1970s. In this study, we examined the effect of this abrupt rainfall decrease on the association between rainfall and circulation on the interannual timescale, and found that the interdecadal variation does not change the physical mechanism responsible for the interannual variation of North China rainfall. There is a linear relationship between the interdecadal and interannual variabilities of North China rainfall in rainy season.

关 键 词：线性关系 中国北部 降雨量 大气环流 

分 类 号：P468.024[天文地球—大气科学及气象学]