Page 44 - 《水资源与水工程学报》2023年第1期
P. 44

!34 " ! 1 #                       & ' ( ) & * + , -                               Vol.34No.1
               2023 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2023

            DOI:10.11705/j.issn.1672-643X.2023.01.05


               )*µ¶+,-5–.[ À/0”12CiH‰


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                 FGHIJ:P426.6   KLMNO:A    KPQJ:1672643X(2023)01004010
                              Responseofextremeprecipitationtolocalaverage
                                    temperatureintheYangtzeRiverBasin

                                               1,2
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                                     JIANGYan ,HEXinguang ,ZHANGXinping
                    (1.SchoolofGeographicalSciences,HunanNormalUniversity,Changsha410081,China;2.KeyLaboratoryof
                            GeospatialBigDataMiningandApplication ,HunanProvince,Changsha410081,China)
                 Abstract:Studyingthenonstationarityofextremeprecipitationanditsresponsetotemperaturecanhelp
                 thefightagainstthenegativeeffectsfromrainfallrelatedhazards.Basedonthegriddatasetofdailypre
                 cipitationandtemperatureovertheYangtzeRiverBasinfrom1961to2020 ,thegeneralizedextremevalue
                 modelsareestablishedtoconfirmwhethertheprevious0day (T )andtheprevious9day(T )local
                                                                      0                         1-9
                 averagetemperatureswouldcausenonstationarityinextremeprecipitation.Thentheresponsesofextreme
                 precipitationtoT andT areinvestigatedbyequalsamplebinningmethod,piecewiselinearregression
                                     1-9
                               0
                 andexponentialregression.Theresultsshowedthattheextremeprecipitationwasnonstationaryat
                99.7% ofthegridsofthebasin ,T andT inducednonstationarityinextremeprecipitationat74.4%
                                              0     1-9
                 ofthegrids,andT hadagreaterimpactonextremeprecipitationthanT.Extremeprecipitationintensi
                                1-9                                           0
                 tyincreasedatlowtemperaturebutdecreasedathightemperature(peakstructure)withtheriseofT in
                                                                                                      0
                 thebasin.Besides,therewasanobviousdividinglineattheeasternmarginoftheTibetanPlateau,and
                 thepeakpointtemperaturewashigher (about24℃)intheeastbutlower(about9℃)inthewestof
                 thisline.Meanwhile,thescalingrateofextremeprecipitationwithT rangefrom -12.3%/℃ to
                                                                              0
                53.6%/℃ andshoweda“superCC,CClikeandsubCCscaling”patternfromSichuanBasincenterto

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                '()*: K(0IEÔJ?s†Á¬„2./(18K018)
                +,-.: v à(1997-), A, rrwqE, FG+^L, OP+^µf¾1U·¸。
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