| Title: | "Multiple Impacts of Aerosols on O(3) Production Are Largely Compensated: A Case Study Shenzhen, China" |
| Author(s): | Tan Z; Lu K; Ma X; Chen S; He L; Huang X; Li X; Lin X; Tang M; Yu D; Wahner A; Zhang Y; |
| Address: | "Institute of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Julich GmbH, 52428Julich, Germany. International Joint Laboratory for Regional Pollution Control, 52428Julich, Germany. International Joint Laboratory for Regional Pollution Control, 100871Beijing, China. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, 100871Beijing, China. Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, 518055Shenzhen, China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Tropospheric ozone (O(3)) is a harmful gas compound to humans and vegetation, and it also serves as a climate change forcer. O(3) is formed in the reactions of nitrogen oxides and volatile organic compounds (VOCs) with light. In this study, an O(3) pollution episode encountered in Shenzhen, South China in 2018 was investigated to illustrate the influence of aerosols on local O(3) production. We used a box model with comprehensive heterogeneous mechanisms and empirical prediction of photolysis rates to reproduce the O(3) episode. Results demonstrate that the aerosol light extinction and NO(2) heterogeneous reactions showed comparable influence but opposite signs on the O(3) production. Hence, the influence of aerosols from different processes is largely counteracted. Sensitivity tests suggest that O(3) production increases with further reduction in aerosols in this study, while the continued NO(x) reduction finally shifts O(3) production to an NO(x)-limited regime with respect to traditional O(3)-NO(x)-VOC sensitivity. Our results shed light on the role of NO(x) reduction on O(3) production and highlight further mitigation in NO(x) not only limiting the production of O(3) but also helping to ease particulate nitrate, as a path for cocontrol of O(3) and fine particle pollution" |
| Keywords: | Humans *Air Pollutants/analysis *Ozone/analysis *Air Pollution China *Volatile Organic Compounds/analysis Aerosols/analysis Environmental Monitoring Atmospheric Oxidation Capacity Cocontrol pollution Heterogeneous Reactions O3 Pm2.5; |
| Notes: | "MedlineTan, Zhaofeng Lu, Keding Ma, Xuefei Chen, Shiyi He, Lingyan Huang, Xiaofeng Li, Xin Lin, Xiaoyu Tang, Mengxue Yu, Dan Wahner, Andreas Zhang, Yuanhang eng Research Support, Non-U.S. Gov't 2022/12/07 Environ Sci Technol. 2022 Dec 20; 56(24):17569-17580. doi: 10.1021/acs.est.2c06217. Epub 2022 Dec 6" |
