气象与环境学报2011，Vol.27Issue(2)：50-55,6.
1964-2008年辽宁省旱涝时空分布特征及演变趋势
Temporal and spatial distributions of drought/flood and their evolution trends from 1964 to 2008 in Liaoning province
摘要
Abstract
Based on the annual precipitation data from 51 weather stations from 1964 to 2008 in Liaoning province,the characteristics of drought and flood were analyzed with Z index for a single station and HL index for a region.The results indicate that the occurrence frequencies of drought and flood in a single station are higher in the westem,northern and southeastern regions than in the middle and eastern regions of Liaoning province.The regional flood index decreases gradually, while the regional drought index increases gradually.Z indices of 51 weather stations are analyzed by empirical orthogonal function (EOF) and rotated empirical orthogonal function (REOF)methods.It shows that spatial distributions of drought and flood are influenced by not only rainfall change brought by large-male weather system, but also different factors such as geographical location, land and sea distributions and so on.The study areas can be divided into 4 regions by REOF method,namely, I region is the western Liaoning province; Il region is the northern and northwestern Liaoning province; Ill region is the central and eastern Liaomg province and 1Vregion is the southeastern Liaoning province.关键词
降水/旱涝/Z指数/EOF/REOFKey words
Precipitation/ Flood/drought/ Z-index/ Empirical orthogonal function ( EOF )/ Rotated empirical orthogonal function (REOF)分类
天文与地球科学引用本文复制引用
唐亚平,张凯,李忠娴,李岚,戴新童,严晓瑜..1964-2008年辽宁省旱涝时空分布特征及演变趋势[J].气象与环境学报,2011,27(2):50-55,6.基金项目
公益性行业专项(GYHY20090627)和辽宁省气象局2010年科研课题"基于GIS的辽宁高速公路交通气象信息服务系统"共同资助. （GYHY20090627）
