CauseandpredictabilityfortheseverehazepollutionindowntownBeijinginNovemberDecember2015.pdfBasedonthehourlyPM2.5concentrations,meteorologicalvariablerecordsandERA-Interimreanalysisdata,aseriesofdiagnosticanalyseswereconductedtoexplorethepossiblemeteorologicalcausesfortheseverehazepollutionthatoccurredinBeijinginNovember-December2015.Usingtheonline-coupledWRF-ChemmodelandGFSdata,thepredictabilityofhourlyanddailyPM2.5concentrationswasevaluated.Theresultsshowedthat,inthecontextofpollutantemission,theseverehazepollutionindowntownBeijinginNovember-December2015wasprimarilyattributedtoanomalouslocalmeteorologicalconditions,whichwerecausedandstrengthenedbyanomalouslarge-scaleatmosphericcirculations.Theabnormalchangesintheuppertroposphereappearedtotriggertheanomaliesinthemiddle-lowertroposphereandthelocalconditions.ThenumericalsimulationscancapturethespatialdistributionpatternsofthePM2.5concentrationsforpredictionsof1to10daysinadvance.ThePM2.5concentrationtrendsindowntownBeijingweregenerallyconsistentwiththepredictionsonbothdailyandhourlytime-scales,althoughthepredictabilitydecreasedgraduallyastheleadtimesprolonged.ThepredictabilityofthedailymeanPM2.5concentrationwasslightlyhigherthanthatofthehourlyconcentration.ThestatisticalindicessuggestedthatthepredictionsofdailyandhourlymeanPM2.5concentrationsweregenerallyskillfulandreliableformaximumleadtimesof8and5days,respectively.
作者：ZiyinZhang DaoyiGong RuiMao Seong-JoongKim JingXu XiujuanZhao ZhiqiangMa[5]
作者单位：EnvironmentalMeteorologyForecastCenterofBeijing-Tianjin-Hebei,ChineseMeteorologicalAdministration,Beijing100089,China;InstituteofUrbanMeteorology,ChineseMeteorologicalAdministration,Beijing100089,ChinaStateKeyLaboratoryofEarthSurfaceProcessesandResourceEcology,BeijingNormalUniversity,Beijing100875,ChinaKoreaPolarResearchInstitute,Incheon406-840,KoreaInstituteofUrbanMeteorology,ChineseMeteorologicalAdministration,Beijing100089,ChinaEnvironmentalMeteorologyForecastCenterofBeijing-Tianjin-Hebei,ChineseMeteorologicalAdministration,Beijing100089,China
母体文献：第二十二届大气污染防治技术研讨会论文集
会议名称：第二十二届大气污染防治技术研讨会
会议时间：2018年4月19日
会议地点：太原
主办单位：中国环境科学学会
语种：chi
分类号：
关键词：severehazepollution PM2.5 meteorologicalcondition atmosphericcirculation WRF-Chem
在线出版日期：2018年10月31日
基金项目：
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