《Precipitation Chemistry and Corresponding Transport Patterns of Influencing Air Masses at Huangshan Mountain in East China》.pdf

ADVANCESINATM OSPHERICSCIENCES，VOL．31，SEPTEMBER 2014，1157—1166 PrecipitationChemistryandCorrespondingTransportPatternsofInfluencing AirM assesatHuangshanMountaininEastChina SHIChunE ．一，DENGXueliang，YANGYuanjian ，HUANGXiangrong，andWUBiwen AnhuiInstituteofMeteorologicalSciences,KeyLaboratoryforAtmosphericSciencesand RemoteSensingofAnhuiProvince,Hefei230031 StateKeyLaboratoryofAtmosphericBoundaryPhysicsandAtmosphericChemistry,InstituteofAtmosphericPhysics ChineseAcademyofSciences，Beijing100029 KeyLaboratoryofAtmosphericCompositionandOpticalRadiation，AnhuiInstituteofOpticsandFineMechanics, ChineseAcademyofSciences，Hefei230031 (Received17September2013；revised20December2013；accepted10January2014) ABSTRACT OnehundredandtensamplesofrainwaterwerecollectedforchemicalanalysisatthesummitofHuangshanMountain，a high-altitudesiteinEastChina．fromJuly2010toJune20l1．Thevolume—weighted-mean(VWM)pHofrthewholesampling periodwas5．03．S0 —na dCa2十werethemostabundantanionandcation respectively．Theionicconcentrationsvaried monthlywiththehighestconcentrationsinwinter／springandthelowestinsummer．Evidentinter—correlationswerefound amongmostions，indicatingthecommonsourcesofrsomespeciesandfullymixingchraacteristicsofthealpineprecipitation chemistry．TheVWMratioofs【0i_J／N【O ]was2．54，suggestingtheacidityofrainwatercomesrfombothnitricand sulfuricacids．Comparedwithcontemporrayobservationsatotheralpinecontinenta1sitesinChina．theprecipitationat HuangshanMountalnwastheleastpolluted．withthelowestionicconcentrations．TrajectoriestoHuangshanMountainon rainydayscouldbeclassifiedintosixgroups．TherainwaterwithinfluencingairmassesoriginatinginMongoliawasthe