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Evolutionlawofcompounddroughtandheatwaveeventsinthe
upperYellowRiverbasinbasedonCMIP6coupledWRF
1
1
1
2
MENBaohui,LXing,CHENShihao,WANGHongrui
(1.CollegeofWaterResourcesandHydropowerEngineering,NorthChinaElectricPowerUniversity,Beijing 102206,China;
2.CollegeofWaterSciences,BeijingNormalUniversity,Beijing 100875,China)
Abstract:TheCompoundDroughtandHeatwaveeventismoredestructivethanthetraditionalextremeweathere
vent,andithasdevelopedrapidlyallovertheworldinrecentyears.Bywhich,theupperYellowRiverbasinis
particularlyaffectedasaclimatesensitivearea.Itisofgreatsignificancetodescribeitscharacteristicsandanalyze
thefutureevolutiontrendforeventpreventionandcontrol.Inthispaper,adynamicdownscalingmethodoffuture
meteorologicaldatabasedonCMIP6coupledwithWRFisproposed.TheCompoundDroughtandHeatwaveevents
andtheircharacteristicsunderdifferentscenariosintheupperreachesoftheYellowRiverareidentified ,thediffer
encebetweenthecompoundeventandthesingleeventisrevealed ,andthefutureevolutionlawoftheCompound
DroughtandHeatwaveeventisanalyzed.Theresultsshowthat :(1)comparedwiththesingleevent,thetempera
tureoftheCompoundDroughtandHeatwaveeventinthehistoricalperiod ,SSP245andSSP585scenariosincreases
by3.8%,13.1% and13.5%,whilethedroughtindexdecreasesby5.8%,2.6% and2.6%.(2)Underthe
SSP245scenario ,thecharacteristicsoftheCompoundDroughtandHeatwaveeventarehighinthesouthwestand
lowinthenortheast,whileintheSSP585scenario,thedistributioninthenorthandeastisthehighest.(3)Inthe
future ,thecharacteristicsofregionalCompoundDroughtandHeatwaveeventsshowasignificantupwardtrend,in
whichtherisingtrendofSSP585ishigherthanthatofSSP245.
Keywords:CMIP6;upperYellow Riverbasin;WRFmodel;CompoundDroughtandHeatwaveevents;MK
trendtest
(责任编辑:耿庆斋)
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