1960～2006年重庆市高温天气频次气候特征morlet小波分析  

Morlet Wavelet Analysis of Frequency Climatic Characteristics of High-temperature Weather in Chongqing from 1960 to 2006

作　　者：韩世刚[1,2] 吉莉[1,2] 陈欢[1,2] 苟思[1,2] 

机构地区：[1]重庆市气象局,重庆401147 [2]兰州大学大气科学学院,甘肃兰州73000

出　　处：《安徽农业科学》2010年第28期15732-15733,共2页Journal of Anhui Agricultural Sciences

摘　　要：利用1960～2006年重庆市34个地面气象站逐日气温资料,使用morlet小波分析方法分析了重庆市高温天气气候特征。结果表明,重庆市35℃以上高温天气经历了先下降后上升的过程,重庆40℃以上的特别严重高温日数变化趋势前期不明显,但是从20世纪90年代开始出现了急速上升趋势。重庆市2～4年高温日数振荡周期最强时段出现在20世纪70年代后期。重庆市2～8年特别严重高温日数振荡最强时段出现在2000年后。By using the daily air temperature data from 34 meteorological observation stations in Chongqing from 1960 to 2006,the climatic features of high temperature weather in Chongqing were analyzed by using morlet wavelet analysis.The results showed that the high-temperature （above 35 ℃） weather in Chongqing had a trend of first decreasing then increasing.The change trend of extremely serious high-tempera-ture （over 40 ℃） days was not obvious in early period,but it showed a rapidly increasing trend since 1990s.The strongest period of oscillation period of 2-4 year high temperature days in Chongqing appeared in the late stage of 1970s.The strongest period of oscillation period of 2-8 year extreme serious high temperature days appeared after 2000.

关 键 词：高温天气 MORLET小波分析 MATLAB 重庆 

分 类 号：P468.021[天文地球—大气科学及气象学]