Vertical changes of PM2.5 driven by meteorology in the atmospheric boundary layer during a heavy air pollution event in central China
文献类型：期刊论文
| 作者 | Sun, Xiaoyun2; Zhao, Tianliang2; Tang, Guiqian1; Bai, Yongqing3; Kong, Shaofei4; Zhou, Yue3; Hu, Jun5; Tan, Chenghao6,7; Shu, Zhuozhi2; Xu, Jiaping8 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 858页码:10 |
| 关键词 | ABL RegionalPM2 5 transport Receptor region Heavy air pollution |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2022.159830 |
| 英文摘要 | Regional PM2.5 transport is a crucial factor affecting air quality, and the meteorological mechanism in the atmospheric boundary layer (ABL) has not been fully understood over the receptor region in the regional transport of air pollutants. Based on the intensive vertical measurements of air pollutants and meteorology in the ABL during a transport-induced heavy air pollution event in Xiangyang, an urban site over a receptor region in central China, we investigated the me-teorological mechanism in vertical PM2.5 changes in the ABL for heavy air pollution over the receptor region. Driven by northerly winds, regional PM2.5 transport was built from upstream northern China to downstream central China, where the observed ABL structures were unstable throughout the air pollution event. We assessed the ABL structures with meteorological and PM2.5 profiles at growth, maintenance, and dissipation stages, and elucidated the mechanism of regional PM2.5 transport inducing air pollution over the receptor region with the contribution of thermal and me-chanical factors. The regional PM2.5 transport was concentrated in the upper ABL over the downwind receptor region with high PM2.5 concentrations at altitudes of 600-800 m, where the transported PM2.5 peaks were downwards mixed by vertical wind shear, forming the vertical PM2.5 transport from the upper ABL to near-surface in the growth stage; the weakened winds and less unstable structures in the ABL favored the sustained pollution with slight vertical PM2.5 changes in the maintenance stage, which was dominated by thermal factors with 87 % contribution; the removal of PM2.5 was triggered by increasing winds from the upper ABL, activating the dissipation of heavy PM2.5 pollution with the mechanical effect accounting for 60 % in the dissipation stage. These findings could improve our understanding of ABL's influence on air pollution over the receptor region with implications for the regional transport of air pollutants in environmental changes. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000898781500015 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/71402]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Zhao, Tianliang |
| 作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atmo, Beijing 100029, Peoples R China 2.Nanjing Univ Informat Sci & Technol, PREMIC, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Key Lab Aerosol Cloud Precipitat China Meteorol Ad, Nanjing 210044, Peoples R China 3.China Meteorol Adm, Inst Heavy Rain, Wuhan 430205, Peoples R China 4.China Univ Geosci Wuhan, Sch Environm Studies, Dept Atmospher Sci, Wuhan 430074, Peoples R China 5.Fujian Acad Environm Sci, Fuzhou 350011, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 8.Jiangsu Climate Ctr, Nanjing 210009, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Xiaoyun,Zhao, Tianliang,Tang, Guiqian,et al. Vertical changes of PM2.5 driven by meteorology in the atmospheric boundary layer during a heavy air pollution event in central China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,858:10. |
| APA | Sun, Xiaoyun.,Zhao, Tianliang.,Tang, Guiqian.,Bai, Yongqing.,Kong, Shaofei.,...&Ma, Xiaodan.(2023).Vertical changes of PM2.5 driven by meteorology in the atmospheric boundary layer during a heavy air pollution event in central China.SCIENCE OF THE TOTAL ENVIRONMENT,858,10. |
| MLA | Sun, Xiaoyun,et al."Vertical changes of PM2.5 driven by meteorology in the atmospheric boundary layer during a heavy air pollution event in central China".SCIENCE OF THE TOTAL ENVIRONMENT 858(2023):10. |
入库方式： OAI收割
来源：广州地球化学研究所
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