Page 100 - 《水资源与水工程学报》2022年第5期
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! 33 " ! 5 #                      & ' ( ) & * + , -                               Vol.33No.5
               2022 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2022

            DOI:10.11705/j.issn.1672-643X.2022.05.12


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                                 +
                 HIJKL:P426.61 4   MNOPQ:A    MRSL:1672643X(2022)05009613
               PrecipitationdivisionoftheQinghai-TibetPlateaufrom1978to2018and
                             spatiotemporalevolutioncharacteristicsofeachzone

                                                                  1,2,3
                                                                                                     1,2,3
                                                  1,2,3
                               1,2,3
                 GONGChengqi ,DONGXiaohua             ,WEIChong      ,OUYANGXijun     1,2,3 ,WUHanyu
              (1.CollegeofHydraulicandEnvironmentalEngineering,ChinaThreeGorgesUniversity,Yichang443002,China;2.Engineering
                  ResearchCenterofEcoenvironmentinThreeGorgesReservoirRegion,MinistryofEducation,Yichang443002,China;
                       3.HubeiProvincialCollaborativeInnovationCenterforWaterResourcesSecurity,Wuhan430072,China)
                 Abstract:Aimingatthedynamicimpactofglobalclimatechangeonthespatialandtemporalevolutionof
                 precipitation ,thedailyprecipitationdataof85meteorologicalstationsinandaroundtheQinghai-Tibet
                 Plateauduring41afrom1978to2018wereselectedtoanalyzethetypicaldistributiontypesofannual
                 precipitationandregionalspatiotemporalevolutionofprecipitationoftheplateauusingempiricalorthogo
                 nalfunction(EOF),rotatingempiricalorthogonalfunction(REOF),Sen’sslopeestimation,slidingt
                 testandMorletwaveletanalysis.TheresultsshowthattheoverallannualprecipitationoftheQinghai-
                 TibetPlateaumainlypresentedtwotypicaldistributiontypes ,whicharenorth-southdifferenceand
                 southeast-northwestdifference,andtherewasadry-wetdifferencethatgraduallydecreasedaroundthe
                 centercomposedofthelowerreachesoftheYarlungZangboRiver ,thelowerreachesoftheLancangRiv
                 erandwesternSichuan.REOFwasthenusedtodividetheQinghai-TibetPlateauintoeightgeographic
                 zones ,theprecipitationinzoneⅤ andⅥ showedadownwardtrend,withadecreaseof1.5% and
                3.7%,respectively;whereastheprecipitationinZone Ⅰ, Ⅱ, Ⅲ, Ⅶ andⅧ showedanupwardtrend,

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