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关中盆地近地面风场和大气输送特征分析.docx

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关中盆地近地面风场和大气输送特征分析 Title:AnalysisofNear-SurfaceWindFieldsandAtmosphericTransportCharacteristicsintheGuanzhongBasin Introduction: TheGuanzhongBasin,locatedinthecentralpartofChina,isanimportantgeographicalregionwithsignificantimplicationsforitsclimateandenvironmentalpatterns.Thestudyofnear-surfacewindfieldsandatmospherictransportcharacteristicsinthisareaprovidesvaluableinsightsintoregionalairpollution,weatherpatterns,andclimatechanges.Thispaperaimstoanalyzethenear-surfacewindfieldsandatmospherictransportfeaturesintheGuanzhongBasinandtheirimplicationsforvariousenvironmentalphenomena. I.Near-SurfaceWindFieldsintheGuanzhongBasin A.GeographicalInfluences: 1.Topography:TheGuanzhongBasinissurroundedbymountainsonthreesides,whichsignificantlyimpactswindflowandcirculationpatterns. 2.Monsoonalinfluence:TheEastAsianmonsoonsystemaffectswinddirectionsandintensitiesinthebasin,leadingtoseasonalvariations. B.DiurnalWindCycles: 1.Daytime:Oncleardays,theGuanzhongBasinexperiencesathermal-drivencirculationwithsurfaceheatingleadingtothedevelopmentoflow-pressuresystems. 2.Nighttime:Radiativecoolingofthesurfaceduringthenightcreatesahigh-pressurearea,resultinginsurfacewindsblowingfromthebasintowardsthesurroundingmountains. C.SeasonalVariations: 1.Winter:Coldairmassesfromthenorthwestinfluencethewindpatterns,leadingtonortherlyandnorthwesterlywinds. 2.Summer:Thebasinexperienceswesterlyandsouthwesterlywindsduetosoutherlymonsoonalflowsandthethermallow-pressuresystem. II.AtmosphericTransportCharacteristicsintheGuanzhongBasin A.AirPollutionTransport: 1.LocalSources:Pollutantsemittedfromindustrialactivities,vehicleemissions,anddomesticheatingcontributetothedeteriorationofairqualityinthebasin. 2.RegionalInfluence:Prevailingwindsfacilitatethetransportofpollutantsfromsurroundingregionstowardsthebasin,exacerbatingairpollutionlevels. B.DustTransport: 1.LoessDeposits:TheGuanzhongBasinissituatedontheedgeoftheextensiveLoessPlateau,makingithighlysusceptibletodustevents. 2.NortherlyWinds:Inspring,strongnorthw