1959～2001年保山市隆阳区降水时序特征初步分析

Preliminary study on the serial characteristics of annual precipitation in Baoshan Longyang region

利用保山市气象站43年来的降水资料,分析了隆阳区年降水的时间序列特征。得出以下结论:自1959～2001年保山隆阳区年降水呈现总体上升的趋势。其中降水变化经历了1963～1970年逐渐上升,1971～1987年下降,1988年后迅速上升3个阶段。从降水年代际变化情况来看,该降水序列表现出不稳定的5～7年周期。降水年际波动幅度在1975～1980年和1991～1996年两段时期较小,但波动较为频繁。

In this paper,the characteristics of precipitation in Baoshan Longyang region have been analyzed based on the gauge records of annual precipitation between 1959-2001. By analysis,the conclusions is that under the long time increasing trend,the Precipitation undergo 3 phages, it was increasing from 1960to1970,decreasing weekly from 1971to1987,and increasing strongly after 1988. A cycle period from 5to 7years was detected in the precipitation series. The amplitude of precipitation vibration was small and it fluctuated with high frequency around the mean value in two periods,1975- 1980 and 1991 - 1996.