气象Issue(12)：1656-1662,7.DOI:10.7519/j.issn.1000-0526.2013.12.015
基于多尺度标准化降水指数的陕西苹果主产区气象干旱分析
Drought Analysis Based on Multi-Scale Standardized Precipitation Index of Apple Production Area in Shaanxi Province
摘要
Abstract
By using monthly precipitation data of 30 meteorological stations within the apple production area in Shaanxi Province from 1961 to 2010,the standardized precipitation indexSPI3 ,SPI6 ,SPI9 andSPI12 were calculated.Results show that annualSPI12 ,spring-summer-autumnSPI9 and autumnSPI3 have a significant linear downward trend (P<0.05)and drought intensity tends to increase.The frequency of light drought,mild drought,severe drought and extreme drought in the study area are 16%,6%,4%and 0% correspondingly.Kriging interpolation method is used to draw drought frequency distribution map based onSPIvalue of the stations in the study area.The spatial distribution of annual drought frequency shows that four high drought frequency areas distribute with certain intervals from south to north and the drought frequency in Guanzhong Area is the highest.The spatial distribution of spring-summer-autumn drought frequency has a similar regulation with the frequency of annual drought.The distribution of win-ter-spring drought frequency generally shows the trend of being higher in south than in north.The distri-bution of winter-spring drought frequency shows that the frequency in middle is higher than in the both sides.The drought frequency in Guanzhong Area is the highest in spring,while that in the east of Weibei Area is the highest in the other seasons.In addition,76.4% apple orchards do not have irrigation facili-ties,so this research is of some significance for establishing targeted drought-relief measures and emergen-cy preplans.关键词
陕西苹果/标准化降水指数/气象干旱分析/突变检验Key words
Shaanxi apple production/standardized precipitation index/meteorological drought analysis/abrupt change analysis分类
农业科技引用本文复制引用
王景红,张勇,刘璐..基于多尺度标准化降水指数的陕西苹果主产区气象干旱分析[J].气象,2013,(12):1656-1662,7.基金项目
2011年中国气象局气候变化专项（CCSF2011-4）资助 （）
