摘要:研究采用扩散模型法,基于气象模型WRF耦合空气质量模型Models-3/CMAQ,对2019年辽宁中部城市群PM2.5污染特征进行模拟分析,通过目标情景设计,获取辽宁中部城市群7个城市间大气污染物传输特征并建立传输矩阵。研究发现:辽宁中部城市群中的PM2.5浓度本地源贡献率最高的是本溪(72.2%),其次为沈阳(63.2%),其他城市本地源贡献率在48.9%~62.1%之间。本溪为对外输送型城市,其排放的PM2.5主要影响辽阳(7.8%)和抚顺(7.1%);铁岭与抚顺之间为单向输送,铁岭向抚顺输送的PM2.5占到抚顺贡献率的9.0%,反之仅为2.3%;鞍山与辽阳PM2.5为双向输送,二者之间的影响分别为7.1%与8.3%。受海洋气候影响,营口本地源贡献率为48.9%,且对其他城市的影响仅在0.2%~2.4%之间。关键词:CMAQ;PM2.5;辽宁中部城市群;区域传输Abstract:ThediffusionmodelmethodwasusedtosimulateandanalyzethePM2.5pollutioncharacteristicsofthecentralurbanagglomerationofLiaoningProvincein2019basedonthemeteorologicalmodelWRFcoupledwiththeairqualityModelModels-3/CMAQ.ThetransmissioncharacteristicsofairpollutantsamongsevencitiesinthecentralurbanagglomerationofLiaoningProvincewereobtainedthroughthetargetscenariodesignandthetransmissionmatrixwasestablished.Theresultsshowthat:thecontributionrateoflocalsourcesincentralurbanagglomerationofLiaoningProvinceisthehighestinBenxi(72.2%),followedbyShenyang(63.2%),andthecontributionrateoflocalsourcesinothercitiesrangesfrom48.9%to62.1%.Benxiisanexternaltransportcity,andthepollutantsemittedmainlyaffectLiaoyang(7.8%)andFushun(7.1%);transmissionchainbetweenTielingandFushunisone-way,andPM2.5transmittedfromTielingtoFushunaccountsfor9.0%ofFushun'scontributionrate,whileonly2.3%viceversa;thePM2.5transmissioninAnshanandLiaoyangisbidirectional,andtheinfluencebetweenthemis7.1%and8.3%,respectively.UndertheinfluenceofMarineclimate,thecontributionrateofYingkoulocalsourcesis48.9%,andtheimpactonothercitiesrangesfrom0.2%to2.4%.Keywords:CMAQ;PM2.5;centralurbanagglomerationofLiaoningProvince;regionaltransmission中图分类号:X51文献标识码:A文章编号:1674-1021(2023)05-0069-041引言...