南京信息工程大学学报Issue(3)：260-267,8.
近49年来河北省干旱时空变化特征研究
Spatial-temporal characteristics analysis of drought in Hebei province in recent 49 years
摘要
Abstract
Based on seasonal and annual precipitation data from 73 meteorological stations during 1961—2009 in Hebei province and its vicinity,the spatial and temporal characteristics of drought are analyzed by the precipitation Z index,empirical orthogonal function and Morlet wavelet analysis method. The results show that uniform drought/flood is the most common pattern for the distribution of seasonal and annual drought in Hebei.The second pattern is a seesaw between southern and northern region,including flood in south with drought in north,and drought in south with flood in north.The emergence of seasonal and annual drought has obvious inter⁃decadal changes as well as sig⁃nificant inter⁃annual changes.In the recent 49 years,annual drought index in Hebei presented a downward trend.An abrupt change of annual drought index emerged after 1979 and the climate in the province has entered into dry peri⁃od since then.关键词
降水/Z 指数/干旱/时空特征/河北省Key words
precipitation/Z index/drought/spatial-temporal characteristics/Hebei province分类
天文与地球科学引用本文复制引用
王宏,余锦华,李宗涛..近49年来河北省干旱时空变化特征研究[J].南京信息工程大学学报,2015,(3):260-267,8.基金项目
公益性行业（气象）科研专项 （）
