基于SPEI的三江平原作物生长季干旱时空特征分析

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中图分类号：P426.6 文献标志码：A 文章编号：2095-2945（2025）30-0077-05

Abstract：InordertodeeplyexplorethetemporalandspatialcharacteristicsofdroughtintheSanjiangPlaincropgrowing season（MaytoSeptember），thestudywasbasedonthegridmeteorologicaldataoftheSanjiangPlain，usedthePenmanMonteithformulatocalculatepotentialevapotranspiration，andthencalculatedtheStandardizedPrecipitationEvapotranspiration Index（SPEI），andbasedonindicatorssuchasdroughtfrequencyrange，durationandintensitythedroughtevolutionlawsinthe studyareawererevealed.TheresultsshowthattheinterannualSPEIgenerallyshowsanupwardtrend（O.Oll/a），andtheclimate tendstobecomehumid.2O14isasuddenchangeyearintheSanjiangPlainfromdroughttohumidity；droughtocursmost frequentlyinAugust，andJulyisaperiodofhighincidenceofseveredrought.Thespatialdistributionofdroughtfrequencyon anannualscaleshowsapattemof"highinthemiddle，lowinthenorthandsouth".Thedurationandseverityofdroughtin theShuangyashan and Jixi areas are higher than those in the northwest.

Keywords：SanjiangPlain；cropgrowingseason；meteorologicaldrought；standardizedprecipitationevapotranspirationindex; spatio-temporal characteristics

在全球气候变化的背景下，干旱作为一种具有广泛影响和强烈破坏力的自然灾害，其研究价值和现实意义日益凸显。（剩余5666字）