灾害学2017，Vol.32Issue(1)：90-95,6.DOI:10.3969/j.issn.1000-811X.2017.01.016
1961－2010年吉林省作物生长季极端降水时空变化特征
Temporal and Spatial Change Analysis of Extreme Precipitation of the Crop Growth Period in Jilin Province
摘要
Abstract
Drought is one of the major agro-meteorological disasters in Jilin province,extreme drought serious-ly hampering crop growth and reducing crop yields.Under the background of global climate change,flood events also appeared increasingly.Based on the daily precipitation data of 18 observational stations in Jilin province during 1961 -2000,we selected 7 extreme precipitation indices and analyzed the temporal and spatial variation character-istics of extreme precipitation indices within crop growth period.The main conclusions were listed as follows:ex-treme precipitation indices were all showed increasing trends except GPRr25 .GPTDD accounted for 34.5% of TOTDD averagely,accounted for 56.4% of the entire growing season.The occurrence frequency of GPCDD and CDD>10 in each period tend to the average distribution trend.The occurrence frequency of GPRr25 and GPRr50 mainly focused on July and August,the highest occurrence frequency of GPRr25 and GPRr50 appeared in late Ju-ly.The spatial distribution of GPTDD,GPCDD and TCDD>10 were decreasing from the northwest to southeast. The spatial changing trend of linear tendency rate of GPTDD、GPCDD、GPRr25 and GPRr50 were not obvious, but the linear tendency rates of GPTDD and GPCDD were all positive,and the linear tendency rates of GPRr25 and GPRr50 were negative in the northwest of Jilin province.This study is important for clearing the changing situation of extreme precipitation in Jilin province,which is helpful for the disaster defense of extreme precipitation.关键词
极端降水/作物/生长季/时空变化/吉林省Key words
extreme precipitation/the crop growth period/temporal and spatial change/Jilin province分类
资源环境引用本文复制引用
王秀芬,尤飞..1961－2010年吉林省作物生长季极端降水时空变化特征[J].灾害学,2017,32(1):90-95,6.基金项目
国家自然科学基金项目 （）
