Multilevel air quality evolution in Shenyang:Impact of elevated point emission reduction

作     者：Xiaolan Li Guiqian Tang Liguang Li Weijun Quan Yangfeng Wang Ziqi Zhao Ningwei Liu Ye Hong Yanjun Ma Xiaolan Li;Guiqian Tang;Liguang Li;Weijun Quan;Yangfeng Wang;Ziqi Zhao;Ningwei Liu;Ye Hong;Yanjun Ma

作者机构：Institute of Atmospheric EnvironmentChina Meteorological AdministrationNo.388 Changbai South RoadShenyangLiaoning 110166China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric ChemistryInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Environmental Meteorology Forecast Center of Beijing-Tianjin-HebeiBeijing 100089China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2022年第34卷第3期

页      面：300-310页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：This work was supported by the National Natural Science Foundation of China(No.41730647) the Natural Science Foundation of Liaoning Province(No.2020-MS-350) the Science&Technology Project of Liaoning Province(No.2019JH8/10300095) the Key Program of Science Foundation of Liaoning Meteorological Office(Nos.201904,D202101) the Basic Research Funds of Central Public Welfare Research Institutes(Nos.2018SYIAEZD4,2020SYIAEZD1) the Open Project of Shangdianzi National Atmosphere Background Station(No.SDZ2020620) 

主　　题：Aerosol pollution Atmospheric visibility Planetary boundary layer Northeast China Vertical evolution 

摘      要：Visibility observed at different altitudes is favorable to understand the causes of air *** conducted 4-years of observations of visibility at 2.8 and 60 m and particulate matter(PM)concentrations from 2015 to 2018 in Shenyang,a provincial city in Northeast *** results indicated that visibility increased with the increasing height in winter(especially at night),and decreased with height in summer(especially at the daytime).PM concentration exhibited opposite vertical variation to visibility,reflecting that visibility de-grades with the increase of aerosol concentration in the *** radiosonde meteorological data showed that weak turbulence in the planetary boundary layer(PBL)in winter favored aerosols accumulation near the *** in summer,unstable atmospheric con-ditions,upper-level moister environment,and regional transport of air pollutants resulted in the deterioration of upper-level ***-annual variation in the two-level visibility indicated that the upper-level visibility improved more significantly than low-level visibil-ity,much likely due to the reduction in emission of elevated point sources in *** study suggested that strengthening the control of surface non-point emissions is a promis-ing control strategy to improve Shenyang air quality.