辽宁省近48年降水变化特征研究  

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

作　　者：张海娜[1] 高杰[1] 

机构地区：[1]辽宁省沈阳区域气候中心,辽宁沈阳110016

出　　处：《安徽农业科学》2011年第15期9102-9103,共2页Journal of Anhui Agricultural Sciences

摘　　要：[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。[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 whole,and there was great difference in seasonal variation range;there was more rainfall in 1960s,1970s and 1990s and less rainfall in 1980s;annual and seasonal variation of spring precipitation were great,with increase trend on the whole,while it showed decrease trend in other season;the main fluctuation period of precipitation was 7-9 years which included shorter oscillation period of 2-3 years.[Conclusion] The study could provide scientific references for the rational utilization of water resources,disaster prevention and reduction in Liaoning Province.

关 键 词：降水 变化趋势 特征分析 

分 类 号：P468.024[天文地球—大气科学及气象学]