Page 21 - 《水资源与水工程学报》2023年第2期
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!34 " ! 2 #                       & ' ( ) & * + , -                               Vol.34No.2
               2023 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2023

            DOI:10.11705/j.issn.1672-643X.2023.02.03


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                          Temperatureinterpolationconsideringterrainfluctuations

                                                    1
                                                                    2
                                   WANGChangqing,FANGYizhou,XIONGYujiu             1,3,4
                 (1.SchoolofCivilEngineering,SunYat-senUniversity,Zhuhai519082,China;2.AffairsCenterofPearlRiverBasin
                      FrontandRearChannel ,Guangzhou510641,China;3.CenterforWaterResourcesandEnvironment,Sun
                           Yat -senUniversity,Guangzhou510275,China;4.SouthernMarineScienceandEngineering
                                       GuangdongLaboratory(Zhuhai),Zhuhai519000,China)

                 Abstract:Temperatureisdirectlyaffectedbytheearth’senergyprocessandisanimportantindicatorof
                 climatechange ,theaccuratemeasurementandthegraspofspatiotemporaldistributionoftemperatureisof
                 greatsignificanceforthestudyofenergyprocessandclimatechange.Spatialinterpolationisanimportant
                 methodtoobtaintemperaturespatialdistribution ;however,terrainfluctuationsaffecttheinterpolationre
                 sultsgreatly ,whichrestrictstheaccuracyofestimateddataofspatialtemperature.Toaddresssuchchal
                 lenge ,weperformedacasestudytotesttemperatureinterpolationwithandwithoutconsideringterrain
                 fluctuationsintheLoessPlateauwithhugeelevationvariations.Basedonthetemperatureobservations
                 from33nationalmeteorologicalstationsandShuttleRadarTopographyMission(SRTM)digitalelevation
                 model (DEM)of1km,differencesbetweentemperaturevaluesinterpolatedwithandwithoutconsidering
                 terrainfluctuationsweresystematicallystudiedathourly,daily,andmonthlyscales,respectively.The
                 resultsshowthatatthesethreescales,theinterpolationresultsvarygreatlybeforeandafterterraincorrec
                 tion,andthedifferenceincreaseswiththeincreaseofelevation.Whentheelevationisbelow1,000m,
                 thetemperaturedifferencebeforeandafterterraincorrectionisrelativelysmall(themeanvalueisless
                 than0.5℃),whereasitcanreach3℃ whentheelevationexceeds2,000m,and6℃ whentheeleva
                 tionisgreaterthan3,000matmonthlyscale.Moreover,theinfluenceofelevationfluctuationsoninter
                 polationresultstendstoweakenwhenthetemporalscalechangesfromhourlytodailyandtomonthly.

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