2023年1月JournalofGreenScienceandTechnology第25卷第2期收稿日期:2022-11-10作者简介:张壹(1990-),女,硕士,工程师,主要从事大气污染治理方向相关工作。2019~2021年唐山市PM2.5及O3污染特征分析张壹,魏扬(唐山市环境规划科学研究院唐山市生态环境宣传教育中心,河北唐山063000)摘要:为了解近年来唐山市大气污染特征,基于2019~2021年的空气质量数据,对唐山市PM2.5及O3污染规律进行了分析。结果表明:①唐山市PM2.5及O3年均浓度均呈现逐年下降趋势,但仍超过国家二级标准;②PM2.5浓度季节分布特征表现为冬季浓度高,夏季浓度低的分布特点;O3浓度则呈现夏季浓度高,冬季浓度低的特点;③PM2.5小时浓度日变化呈双峰型分布,小时浓度最大值出现时段为4:00~7:00;O3的24h变化曲线呈单峰型分布,在午后15:00~16:00达到浓度峰值;④空间上,2019~2021年PM2.5高值浓度主要集中于古冶区、丰润区以及滦州市;O3年均浓度超标县区主要为玉田县、迁西县、遵化市以及路南区。关键词:PM2.5和O3复合污染;污染特征;时空分布中图分类号:X51文献标识码:A文章编号:1674-9944(2023)02-0081-07CharacteristicsofPM2.5andO3PollutioninTangshanCityFrom2019to2021ZhangYi,WeiYang(TangshanInstituteofEnvironmentalPlanningandScience(TangshanEcologicalEnvironmentPublicityandEducationCenter),Tangshan,Hebei063000,China)Abstract:ToresearchtherecentatmosphericpollutioncharacteristicsinTangshanCity,thepollutioncondi-tionsofPM2.5andO3havebeenanalyzedbyusingtheairqualitydatafrom2019to2021.Theresultsshowedthat:①TheannualconcentrationsofPM2.5andO3inTangshancityshowedthedownwardtrend,butstillex-ceededthenationalsecondaryairqualitystandard;②TheconcentrationseasonaldistributioncharacteristicsofPM2.5werehigherinwinterandlowerinsummer;whilethevariationofO3concentrationspresentedtheoppo-sitetrend;theconcentrationwashigherinsummerandlowerinwinter;③ThedailyvariationofPM2.5hourlyconcentrationswasbimodal,withthemaximumvalueoccurringfrom4to7AM;the24-hourvariationcurveofO3wasunimodal,withthepeakconcentrationat15and16PM;④Spatially,thehighPM2.5concentrationsfrom2019to2021mainlyconcentratedinGuye,FengrunandLuanzhoudistrict;whiletheO3exceedingcon-ditionswereconcentratedinYutian,Qianxi,ZunhuaandLunandistrict.Keywo...
