Author
BAI Meilan,LI Jintian,LI Xicang,DI Ruiqi,FENG Xianjing,YANG Jing
Journal
Journal of Arid Land Resources and Environment
Paper Keyword
comprehensive meteorological drought index; EOF method; drought characteristics; climate warming
Abstract
Based on the comprehensive meteorological drought index ( CI) ， using data of daily temperature and precipitation of 75 weather stations which have more than 200mm precipitation a year，CI sequences and spatial and temporal distribution in spring and summer during 1961 － 2010 were built． It shows that: ( 1) Drought in spring and summer of central and eastern Inner Mongolia can be divided into three types: drought or not drought all over the central and eastern Inner Mongolia， anticorrelation of east and west part of drought， anticorrelation of north and south part of drought． ( 2) Drought in spring was reduce after 1980， but regional heavy drought in spring was increase; drought frequency in summer in Inner Mongolia increased． ( 3) Climate warming began in 1980s． Since then the precipitation distribution changed， which aggravated the summer drought．
