Analysis on the Climate Characteristics of Summer Drought Frequency in Chongqing  

重庆市伏旱频次气候特征分析(英文)

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：《Meteorological and Environmental Research》2010年第10期36-38,共3页气象与环境研究（英文版）

摘　　要：By using daily meteorological data from 34 surface meteorological stations in Chongqing from 1960 to 2006,the climate characteristics of summer drought in recent 47 years were analyzed by means of Morlet wavelet analysis.The results revealed that summer drought in Chongqing showed obvious decrease trend on the whole,while extreme severe summer drought decreased firstly and then increased,especially since 1990s with obvious increase trend.Around 1995 or 2004,there existed obvious oscillation period of 2-3 years in summer drought in Chongqing,and extreme severe summer drought was very stable without evident oscillation in 1906s,while there was obvious strong oscillation period of 4-5 years in extreme severe summer drought in Chongqing from 1970 to 1978.By using daily meteorological data from 34 surface meteorological stations in Chongqing from 1960 to 2006,the climate characteristics of summer drought in recent 47 years were analyzed by means of Morlet wavelet analysis.The results revealed that summer drought in Chongqing showed obvious decrease trend on the whole,while extreme severe summer drought decreased firstly and then increased,especially since 1990s with obvious increase trend.Around 1995 or 2004,there existed obvious oscillation period of 2-3 years in summer drought in Chongqing,and extreme severe summer drought was very stable without evident oscillation in 1906s,while there was obvious strong oscillation period of 4-5 years in extreme severe summer drought in Chongqing from 1970 to 1978.

关 键 词：Summer drought Morlet wavelet analysis MATLAB CHONGQING China 

分 类 号：P426.616[天文地球—大气科学及气象学]