Analysis on Mean Abrupt Change of Precipitation in Hexi Corridor Region in Recent 50 Years
近50年河西走廊地区降水均值突变特征分析

Based on the precipitation data at 16 meteorological stations in Hexi corridor from 1960 to 2009,the multi-scale mean abrupt changes of annual and seasonal precipitation at each typical station in recent 50 years had been analyzed based on the Mexican Hat wavelet technique.It was showed that mean abrupt changes of annual precipitation in Hexi corridor were detected in 1968,1973,and around 1982,1991 and 2005.Abrupt changes of precipitation from less to more were detected in 1968 and 1991 in the western corri...