Quasi-Meridional Precipitation Belt in East China and Its Formating Cause Analysis
TANG Mao-cang;LIU Miao;ZHU De-qin;LI Dong-liang
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Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
According to clear quasi-meridional geological structure in East China,the quasi-meridional precipitation is classified as three types,they are(1) 3e,there is rainy in Yanlu rapture and coastal areas at east of Yanlu,and there is dry at west areas of Yanlu;(2) 3m,there is rainy near north-south seismic belts in center China,and there is less rain at east of Taihang mountain-Wuling mountain;(3) 3d,there are two rainy belts or two dry belts in East China.Almost all of the meridional precipitation belts occurred in April during summer when rotation of the earth is slower(ΔLOD0) and when such slower is speed-up(Δ2 LOD0).This gives an important index for prediction of meridional precipitation in flood season.