Variability of PM2.5 and O-3 concentrations and their driving forces over Chinese megacities during 2018-2020
文献类型：期刊论文
| 作者 | Xu, Tianyi2,5; Zhang, Chengxin3; Liu, Cheng1,3,4,5; Hu, Qihou5 |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 124 |
| 关键词 | Air pollution PM2.5 and O-3 trends Meteorology COVID-19 lockdown |
| ISSN号 | 1001-0742 |
| DOI | 10.1016/j.jes.2021.10.014 |
| 通讯作者 | Zhang, Chengxin(zcx2011@ustc.edu.cn) ; Liu, Cheng(chliu81@ustc.edu.cn) |
| 英文摘要 | Recently, air pollution especially fine particulate matters (PM2.5) and ozone (O-3) has become a severe issue in China. In this study, we first characterized the temporal trends of PM2.5 and O-3 for Beijing, Guangzhou, Shanghai, and Wuhan respectively during 2018-2020. The annual mean PM2.5 has decreased by 7.82%-33.92%, while O-3 concentration showed insignificant variations by -6.77%-4.65% during 2018-2020. The generalized additive models (GAMS) were implemented to quantify the contribution of individual meteorological factors and their gas precursors on PM2.5 and O-3. On a short-term perspective, GAMS modeling shows that the daily variability of PM2.5 concentration is largely related to the variation of precursor gases (R = 0.67-0.90), while meteorological conditions mainly affect the daily variability of O-3 concentration (R = 0.65-0.80) during 2018-2020. The impact of COVID-19 lockdown on PM2.5 and O-3 concentrations were also quantified by using GAMS. During the 2020 lockdown, PM2.5 decreased significantly for these megacities, yet the ozone concentration showed an increasing trend compared to 2019. The GAMS analysis indicated that the contribution of precursor gases to PM2.5 and O-3 changes is 3-8 times higher than that of meteorological factors. In general, GAMS modeling on air quality is helpful to the understanding and control of PM2.5 and O-3 pollution in China. (C) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| WOS关键词 | SECONDARY ORGANIC AEROSOL ; AIR-POLLUTION ; OZONE CONCENTRATIONS ; NORTH CHINA ; IMPACTS ; TRENDS ; IMPROVEMENT ; CHEMISTRY ; NO2 |
| 资助项目 | National Key Research and Development Program of China[2018YFC0213104] ; National Key Research and Development Program of China[2017YFC0210002] ; National Natural Science Foundation of China[41977184] ; National Natural Science Foundation of China[41941011] ; National Natural Science Foundation of China[51778596] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23020301] ; Major Projects of High Resolution Earth Observation Systems of National Science and Technology[05-Y30B01-9001-19/20-3] ; Youth Innovation Promotion Association of CAS[2021443] ; Young Talent Project of the Center for Excellence in Regional Atmospheric Environment, CAS[CERAE202004] ; China Postdoctoral Science Foundation[2020TQ0320] ; China Postdoctoral Science Foundation[2021M693068] ; Anhui Provincial Natural Science Foundation[2108085QD178] ; Fundamental Research Funds for the Central Universities |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000797162500002 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Major Projects of High Resolution Earth Observation Systems of National Science and Technology ; Youth Innovation Promotion Association of CAS ; Young Talent Project of the Center for Excellence in Regional Atmospheric Environment, CAS ; China Postdoctoral Science Foundation ; Anhui Provincial Natural Science Foundation ; Fundamental Research Funds for the Central Universities |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/130889]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhang, Chengxin; Liu, Cheng |
| 作者单位 | 1.Univ Sci & Technol China, Key Lab Precis Sci Instrumentat, Anhui Higher Educ Inst, Hefei 230026, Peoples R China 2.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Peoples R China 3.Univ Sci & Technol China, Dept Precis Machinery & Precis Instrumentat, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 5.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Tianyi,Zhang, Chengxin,Liu, Cheng,et al. Variability of PM2.5 and O-3 concentrations and their driving forces over Chinese megacities during 2018-2020[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2023,124. |
| APA | Xu, Tianyi,Zhang, Chengxin,Liu, Cheng,&Hu, Qihou.(2023).Variability of PM2.5 and O-3 concentrations and their driving forces over Chinese megacities during 2018-2020.JOURNAL OF ENVIRONMENTAL SCIENCES,124. |
| MLA | Xu, Tianyi,et al."Variability of PM2.5 and O-3 concentrations and their driving forces over Chinese megacities during 2018-2020".JOURNAL OF ENVIRONMENTAL SCIENCES 124(2023). |
入库方式： OAI收割
来源：合肥物质科学研究院
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