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《Yunnan Geographic Environment Research》 2015-06
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SPATIAL AND TEMPORAL VARIATION CHARACTERISTICS OF DROUGHT IN GUANGXI BASED ON SPEI

ZHANG Jing-yang;LU Yuan;LI Jia-li;HUA Cui;School of Geography and Planning,Guangxi Teachers Education University;School of Land Resources and Surveying,Guangxi Teachers Education University;  
The Standardized Precipitation Evapotranspiration Index(SPEI) was used as evaluation index of drought to calculate the monthly precipitation and average temperature among the 87 weather stations in Guangxi region from 1961 to 2013,which showed different scales of SPEI values in each site.According to the change rule of different scales of SPEI values,the frequency of each season,spatial distribution,cycle and the change trend,the authors analyzed the temporal and spatial variation characteristics of drought in Guangxi.The results showed that affected by the monsoon circulation and topography distribution,the odds of summer drought are quite low but high in the winter,while the spatial distribution pattern of spring and autumn drought in Guangxi was obvious.The pattern of spring drought occurs in the northwest of Guangxi and the Beibu Gulf region,while the pattern of autumn drought occurs in the northeast of Guangxi,and the probability of severe drought in autumn is larger than that of in spring.There exist the periodic variations of 4 years,11 years and 15 years in the spring drought while the autumn drought has the periodic variations of 2 years,4 years,11 years as well as 23 years.It has entered into a drought cycle in 21 stcentury.
【Fund】: 广西自然科学基金资助项目(2014GXNSFAA118293)
【CateGory Index】: P426.616
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