辽宁省近48年降水变化特征研究

目的]研究辽宁省近48年降水变化特征。方法]利用1961～2008年辽宁气象观测站的月降水资料,采用一元线性趋势估计、5年滑动平均和小波变换法对辽宁降水变化特征进行分析。结果]1961～2008年辽宁年降水总体呈减少趋势,各季节变化幅度差异较大;60、70、90年代为多雨期,80年代为少雨期;春季降水年季变幅很大,总体呈上升趋势,其他季节呈减少趋势;降水主要波动周期为7～9年,在7～9年的振荡周期中还包含2～3年的更小震荡周期。结论]该研究为当地水资源的合理利用及防灾减灾提供科学依据。

Study on the Variation Characteristic of Precipitation in Liaoning Province in Recent 48 Years

Objective] The aim was to study the variation characteristics of precipitation in Liaoning Province in recent 48 years.Method] According to monthly precipitation data from meteorological observation station in Liaoning Province from 1961 to 2008,the variation characteristic of precipitation in Liaoning was analyzed by means of one-dimensional linear estimation,5-year moving average and wavelet transform method in our paper.Result] Annual mean precipitation in Liaoning from 1961 to 2008 decreased on the w...