干旱地区农业研究Issue(4)：242-249,274,9.
三种不同干旱动态监测指数在陕西省的适用性研究
Application of three dynamic drought-monitoring indexes in Shaanxi Province
摘要
Abstract
Based on the meteorological data such as daily temperature ,precipitation ,wind speed and relative hu-midity from 1981 to 2012 at 96 meteorological stations in Shaanxi Province ,three daily dynamic drought-monitoring in-dexes ,including percentage of precipitation anomalies (Pa) ,standardized precipitation index (SPI) and relative mois-ture index ( MI ) ,were calculated for each station .By dividing the whole province geographically into north ,central and south Shaanxi ,and dividing the seasons into spring (March to May ) ,summer (June to August ) ,autumn (September to November ) and winter (December to January ) ,the corresponding drought occurrence frequency of different drought-mon-itoring indices was calculated and compared with the historical record of actual drought events ,so as to analyze the appli-cability of these drought-monitoring indexes in Shaanxi Province .The result showed that :(1 ) in summer ,the drought occurrence frequency obtained by MI was the highest while that obtained by Pa was the lowest , but in winter , the drought occurrence frequency obtained by MI was the lowest while that obtained by Pa was the highest ;(2 ) Pa was rela-tively suitable for spring and winter while MI was relatively suitable for summer and autumn ;(3 ) since Shaanxi was prone to strong precipitation in summer but long-term lack of precipitation in autumn and winter , SPI was not suitable for summer ,autumn and winter in Shaanxi Province .关键词
陕西省/干旱动态监测/干旱指数/干旱过程Key words
Shaanxi Province/dynamic drought-monitoring/drought index/drought process分类
农业科技引用本文复制引用
贺音,王钊,贺皓..三种不同干旱动态监测指数在陕西省的适用性研究[J].干旱地区农业研究,2014,(4):242-249,274,9.基金项目
陕西省自然科学基础研究计划 （）
