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The drivers and health risks of unexpected surface ozone enhancements over the Sichuan Basin, China, in 2020

文献类型：期刊论文

作者Sun, Youwen4,5; Yin, Hao4,5; Lu, Xiao6; Notholt, Justus1; Palm, Mathias1; Liu, Cheng5; Tian, Yuan3; Zheng, Bo2
刊名ATMOSPHERIC CHEMISTRY AND PHYSICS
出版日期2021-12-22
卷号21
ISSN号1680-7316
DOI10.5194/acp-21-18589-2021
通讯作者Yin, Hao(yhyh95@mail.ustc.edu.cn) ; Lu, Xiao(luxiao25@mail.sysu.edu.cn)
英文摘要Following a continuous increase in the surface ozone (O-3) level from 2013 to 2019, the overall summertime O-3 concentrations across China showed a significant reduction in 2020. In contrast to this overall reduction in surface O3 across China, unexpected surface O-3 enhancements of 10.2 +/- 0.8 ppbv (23.4 %) were observed in May-June 2020 (relative to 2019) over the Sichuan Basin (SCB), China. In this study, we use high-resolution nested-grid GEOS-Chem simulation, the eXtreme Gradient Boosting (XGBoost) machine learning method, and the exposure-response relationship to determine the drivers and evaluate the health risks due to the unexpected surface O-3 enhancements. We first use the XGBoost machine learning method to correct the GEOS-Chem model-measurement O-3 discrepancy over the SCB. The relative contributions of meteorology and anthropogenic emission changes to the unexpected surface O-3 enhancements are then quantified with a combination of GEOS-Chem and XGBoost models. In order to assess the health risks caused by the unexpected O-3 enhancements over the SCB, total premature mortalities are estimated. The results show that changes in anthropogenic emissions caused a 0.9 +/- 0.1 ppbv O-3 reduction, whereas changes in meteorology caused an 11.1 +/- 0.7 ppbv O-3 increase in May-June 2020 relative to 2019. The meteorology-induced surface O-3 increase is mainly attributed to an increase in temperature and decreases in precipitation, specific humidity, and cloud fractions over the SCB and surrounding regions in May-June 2020 relative to 2019. These changes in meteorology combined with the complex basin effect enhance biogenic emissions of volatile organic compounds (VOCs) and nitrogen oxides (NOx), speed up O-3 chemical production, and inhibit the ventilation of O-3 and its precursors; therefore, they account for the surface O-3 enhancements over the SCB. The total premature mortality due to the unexpected surface O-3 enhancements over the SCB has increased by 89.8 % in May-June 2020 relative to 2019.
WOS关键词STRATOSPHERE-TROPOSPHERE EXCHANGE ; ANTHROPOGENIC EMISSION INVENTORY ; GROUND-LEVEL OZONE ; EASTERN CHINA ; GLOBAL BURDEN ; AIR-QUALITY ; DRY DEPOSITION ; MODEL ; POLLUTION ; TRANSPORT
资助项目National Key Research and Development Program of China[2019YFC0214802] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2019434] ; Sino-German Mobility programme[M-0036]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
出版者COPERNICUS GESELLSCHAFT MBH
WOS记录号WOS:000733104800001
资助机构National Key Research and Development Program of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Sino-German Mobility programme
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/126982]  
专题中国科学院合肥物质科学研究院
通讯作者Yin, Hao; Lu, Xiao
作者单位1.Univ Bremen, Inst Environm Phys, D-28334 Bremen, Germany
2.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Inst Environm & Ecol, Shenzhen 518055, Peoples R China
3.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China
4.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, HFIPS, Hefei 230031, Peoples R China
5.Univ Sci & Technol China, Key Lab Precis Sci Instrumentat Anhui Higher Educ, Hefei 230026, Peoples R China
6.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai 519082, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Youwen,Yin, Hao,Lu, Xiao,et al. The drivers and health risks of unexpected surface ozone enhancements over the Sichuan Basin, China, in 2020[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2021,21.
APA Sun, Youwen.,Yin, Hao.,Lu, Xiao.,Notholt, Justus.,Palm, Mathias.,...&Zheng, Bo.(2021).The drivers and health risks of unexpected surface ozone enhancements over the Sichuan Basin, China, in 2020.ATMOSPHERIC CHEMISTRY AND PHYSICS,21.
MLA Sun, Youwen,et al."The drivers and health risks of unexpected surface ozone enhancements over the Sichuan Basin, China, in 2020".ATMOSPHERIC CHEMISTRY AND PHYSICS 21(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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