中山大学学报（自然科学版）2016，Vol.55Issue(2)：124-133,10.DOI:10.13471/j.cnki.acta.snus.2016.02.022
多种气象干旱指数在新疆干旱评价中的应用对比研究
Evaluation and comparability of four meteorological drought indices during drought monitoring in Xinjiang
摘要
Abstract
Drought is perhaps the most complex natural hazard.Drought monitoring is an essential com-ponent of drought risk management.It is usually performed with the use of various drought indices.A number of drought indices have been introduced and applied in the drought monitoring in different regions to date all over the world.Xinjiang was divided into five sub-regions with Fuzzy Clustering Method along with considering its geographic and geomorphic conditions and different vapor sources:northern Xinjiang,southern Xinjiang,northern slope of Tianshan Mountain,southern slope of Tianshan Mountain,and the eastern part of Tianshan Mountain.Comparability analyses and correlation analyses have been carried out between the Standardized Precipitation Index (SPI),the Standardized Precipitation Evapotranspiration Index (SPEI),the Effective Drought Index (EDI),and the Self-calibrating PDSI (scPDSI)to investi-gate advantages and disadvantages of four drought indices and to pick out the most applicable drought in-dex for the five sub-regions in Xinjiang based on daily precipitation and temperature data from 50 meteor-ological stations in Xinjiang.SPI,SPEI,and EDI respond quickly to precipitation and temperature.The tendency and changing characteristics were in consistent with each other.Drought classes and wet classes defined with SPI are higher and lower than with EDI,respectively.Since SPEI can take into account of combined action of precipitation and temperature in the evaluation of drought and wet,some severe droughts that cannot be detected with SPI and scPDSI can be monitored with SPEI.The correlation be-tween SPI and EDI is better than it between SPEI and EDI.The difference of variation tendency between SPI,SPEI,EDI and scPDSI is very large and the relationship between scPDSI and other drought indices is worst.Therefore,scPDSI is not applicable to drought monitoring in Xinjiang.In addition,drought fre-quency,drought severity,drought stations proportion of different classes of annual and seasonal drought have been analyzed with SPEI1 2.No matter annual or seasonal droughts,there are obvious regional and seasonal characteristics.And the influence area has been reduced to an extent.关键词
干旱监测/气象干旱指数/相关性分析/新疆Key words
drought monitoring/meteorological drought indices/correlation analysis/Xinjiang分类
大气科学引用本文复制引用
慈晖,张强,肖名忠..多种气象干旱指数在新疆干旱评价中的应用对比研究[J].中山大学学报（自然科学版）,2016,55(2):124-133,10.基金项目
国家杰出青年科学基金资助项目（51425903）；江苏第二师范学院博士专项资助项目（JSNU2015BZ01）；新疆维吾尔自治区科技计划资助项目（201331104）；香港特别行政区研究资助局资助项目（CUHK441313）；中山大学滨海小流域自然地理综合过程观测与实验平台建设资助项目 （）
