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乌鲁木齐市人工日照时数变化特征分析.docx

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乌鲁木齐市人工日照时数变化特征分析 Abstract ThepurposeofthispaperistoanalyzethecharacteristicsofthechangesinthesunshinedurationinUrumqicity,China.ThestudywasbasedondatacollectedfromthemeteorologicalstationinUrumqicityfrom1951to2020.Theanalysisincludedanexaminationofmonthly,seasonal,andannualchangesinthesunshineduration.TheresultsshowedthatthesunshinedurationinUrumqicityhasdecreasedsignificantlyoverthepast70years.Thedeclineinsunshinedurationwasmostapparentduringthesummermonthsandtheannualmeansunshinedurationwasmostlyaffected.Thedecreaseofsunshinedurationmayresultfromthemeteorologicalandclimatechanges. Introduction SunshinedurationisacrucialfactorintheEarth'sclimatesystem.Itcanaffectthetemperature,precipitation,andtheplant'sgrowth.Therefore,theanalysisofthesunshinedurationchangeshaspracticalsignificanceforpeople'slife,ecologicalenvironment,andeconomicdevelopment.UrumqicityislocatedinthenorthwestofChinaandbelongstothearidregion.Thecityisfamousforitsabundantsunshineresourcesanduniquescenicspots,suchastheHeavenlyLake.However,recentstudieshaveshownthatthesunshinedurationinUrumqicityhaschangedsignificantlyinrecentyears,andlittleresearchhasbeenconducted.Therefore,itisofgreatsignificancetoanalyzethecharacteristicsofthechangesinthesunshinedurationinUrumqicity. Methods ThedatausedinthisstudywerecollectedfromtheUrumqimeteorologicalstation.Thedataincludeddailysunshinedurationinformationfrom1951to2020.TheMann-Kendalltestwasusedtodetecttrendsinthesunshinedurationovertime.Sen'sslopeestimatorwasusedtocalculatethemagnitudeofthetrend.ThedatawereanalyzedbyusingMicrosoftExcelandSPSSsoftware. Results Theanalysisofmonthlychangesinthesunshinedurationshowedasignificantdownwardtrendinthesummermonths,withthegreatestdeclineinJuly.ThesunshinedurationdecreasedsignificantlyfromJunetoSeptember,whichwasthemaincauseofthedecreaseintheannualmeansunshineduration.Incontrast,therewasanupwardtrendinthesunshinedurationinthewintermonths,withthelargestincreaseinDecember.Moreover,thesunshinedurationinthespringandautumnshoweda