重庆市伏旱频次气候特征分析  

Analysis on Features of Chongqing Summer Drought Frequency

作　　者：韩世刚[1,2] 苟思[1,2] 吉莉[1,2] 陈欢[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29期16372-16373,16428,共3页Journal of Anhui Agricultural Sciences

摘　　要：利用重庆市1960～2006年34个地面气象站逐日气象资料,采用Morlet小波分析方法分析了近47年来重庆市伏旱气候变化特征。结果表明,重庆伏旱天气有明显下降趋势;特重伏旱有"先下降-后上升"趋势,特别是从20世纪90年代开始上升趋势越来越明显。重庆市1995和2004年前后伏旱气候变化有明显的2～3年振荡周期;整个60年代,重庆市特重伏旱很稳定,没有明显的振荡变化。1970～1978年重庆市特重伏旱有明显的4～5年强振荡周期。By using the weather data of 34 meteorological observation stations in Chongqing from 1960 to 2006,the features of summer drought frequency were studied with Morlet technique.The results showed that there are a trend of decreasing with the total summer drought frequency and a trend of decreasing-increasing with the extreme serious summer drought frequency in Chongqing.There are a strong period of 2-3 years in 1995 and 2004 with the total summer drought frequency and a strong period of 4-5 years from 1970 to 1978 with the extreme serious summer drought frequency.

关 键 词：伏旱 MORLET小波分析 MATLAB 重庆 

分 类 号：P463.3[天文地球—大气科学及气象学]