近40 a西昌卫星发射中心雨季降水周期及突变特征分析  

Wavelet and Abrupt Analysis of Rainfall Variability for Rain Season during 1974-2013 of Xichang Satellite Launch Center

作　　者：李刚[1] 江晓华[1] 杨查 白涛[2] LI Gang JIANG Xiao-hua YANG Cha BAI Tao(Xiehang Satellite Launeh Center, Xiehang, Siehuan 615000, China No. 94188 Troops of PLA, Xi＇an 710077, China)

机构地区：[1]西昌卫星发射中心气象室 [2]94188部队气象中心

出　　处：《西昌学院学报（自然科学版）》2017年第2期60-63,共4页Journal of Xichang University(Natural Science Edition)

基　　金：国家重点基础研究发展规划项目(2013CB956203);国家自然科学基金项目(41475070;41490642;41575097)

摘　　要：采用西昌卫星发射中心单站的月平均降水资料、Morlet小波分析和Mann-Kendall方法分析了西昌发射场区1974—2013年的降水周期及突变特征。结果表明:降水量在雨季、8和9月呈现出显著的9~16的年代际周期,但其年际周期偏弱。此外,雨季、6和7月存在突变现象,但8和9月并不存在突变现象。Characteristic of rainfall variability over Xichang Satellite Launch Center is analyzed based on monthly mean rainfall data from a single station during 1974-2013 using the Morlet wavelet analysis and Mann-Kendall analysis. The results reveal that rainfall in rainy season, August and September, shows significant periodicities of 9-16, while the interannual periodicities is weak. Besides, rainfall in rainy season, June and July, shows significant climate abrupt, while there is no climate abrupt in August and September.

关 键 词：西昌卫星发射中心 雨季 降水周期 降水突变目标 气候变化 

分 类 号：P426.614[天文地球—大气科学及气象学]