Page 45 - 《水资源与水工程学报》2023年第1期
P. 45
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thesurroundingareas.ExtremeprecipitationintensitywithincreasingT mainlyshowedanupwardtrend
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inthewestwhilepeakstructureintheeastcentralregionofthebasin ,andtheintensityoftheheaviest
extremeprecipitationreacheditspeakwhenthetemperaturewascloseto25℃.Furthermore,thescaling
rateofextremeprecipitationwith T roughlyexhibitedapatternofsuperCCtoCCliketosubCCscal
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ingfrom westtoeastoverthebasin,andthescalingratefellwithinarangeof-3.7%/℃ to
33.8%/℃,whichwasmainlyconcentratedinthevicinityof4%/℃ and10%/℃.Withtheincreaseof
precipitationintensity ,therangeofscalingchangeshortenedowingtothedecreaseofsensitivityofex
tremeprecipitationtotemperaturechange.Inaddition ,itwasspeculatedthatthesuperCCscalingcould
resultfromconvectiveprecipitation,latentheatreleaseandsoon,andthepeakstructurecouldberelated
tocoolingeffectofprecipitation,anticyclonicactivities,etc.
Keywords:extremeprecipitation;localaveragetemperature;nonstationarity;response;Clausius-
Clapeyronscaling;theYangtzeRiverBasin
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