摘要
基于吉林省东部山区13个气象站点1958—2009年逐月降水量数据,采用标准化降水指数(SPI)作为干旱评价因子,对吉林省东部山区干旱程度及时空特征进行分析。在时间上,吉林省东部山区干旱具有持续性的特点,干旱出现的频率在增加。在空间上,发生轻旱的空间分布面积最广,安图县、和龙市、延吉市、龙井市、图们市、梅河口市、通化县和集安市的东南部这些地区轻旱、中旱、重旱的程度均较为严重。
The mountains area of eastern Jilin Province is the most important ecological barrier of northeast Asia.This paper studies the spatial-temporal characteristics of drought in the mountain areas of eastern Jilin Province during 1958 to 2009 by Standardized Precipitation Index（SPI）,one of the drought indexes widely used.According to precipitation data from 13 stations in eastern Jilin Province,SPI12 are calculated to show the temporal characteristics.From the perspective of time,the drought in the mountains of eastern Jilin Province is periodic and sustainable and the frequency of drought is on the increase.From the perspective of space,the light drought is most widely distributed,while the areas of Antu,Helong,Yanji,Longjing,Tumen,Meihekou,Tonghua and the southeast of Ji＇an are severely affected by light drought,middle drought and severe drought.
出处
《环境科学与管理》
CAS
2012年第2期35-39,共5页
Environmental Science and Management
基金
教育部人文社会科学规划基金项目(10YJA840032)
吉林省教育厅社会科学项目
关键词
标准化降水指数(SPI)
反距离加权法
干旱时空特征
吉林省东部山区
standard precipitation index（SPI）
inverse distance weighted（IWD）
spatial-temporal characteristics of drought
mountains of eastern Jilin Province
