| Title: | Novel Method for Ozone Isopleth Construction and Diagnosis for the Ozone Control Strategy of Chinese Cities |
| Author(s): | Shen H; Sun Z; Chen Y; Russell AG; Hu Y; Odman MT; Qian Y; Archibald AT; Tao S; |
| Address: | "School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States. Centre for Atmospheric Science, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom. College of Urban and Environmental Sciences, Laboratory for Earth Surface Processes, Sino-French Institute for Earth System Science, Peking University, Beijing 100871, China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Ozone (O(3)) isopleths describe the nonlinear responses of O(3) concentrations to changes in nitrogen oxides (NO(X)) and volatile organic compounds (VOCs) and thus are pivotal to the determination of O(3) control requirements. In this study, we innovatively use the Community Multiscale Air Quality model with the high-order decoupled direct method (CMAQ-HDDM) to simulate O(3) pollution of China in 2017 and derive O(3) isopleths for individual cities. Our simulation covering the entire China Mainland suggests severe O(3) pollution as 97% of the residents experienced at least 1 day, in 2017, in excess of Chinese Level-II Ambient Air Quality Standards for O(3) as 160 mug.m(-3) (81.5 ppbV equally). The O(3) responses to emissions of precursors vary widely across individual cities. Densely populated metropolitan areas such as Jing-Jin-Ji, Yangtze River Delta, and Pearl River Delta are following NO(X)-saturated regimes, where a small amount of NO(X) reduction increases O(3). Ambient O(3) pollution in the eastern region generally is limited by VOCs, while in the west by NO(X). The city-specific O(3) isopleths generated in this study are instrumental in forming hybrid and differentiated strategies for O(3) abatement in China" |
| Keywords: | *Air Pollutants/analysis *Air Pollution China Cities Environmental Monitoring *Ozone/analysis *Volatile Organic Compounds/analysis Cmaq-hddm Ekma air pollution decoupled direct method nitrogen oxide ozone abatement ozone isopleth volatile organic compound; |
| Notes: | "MedlineShen, Huizhong Sun, Zhe Chen, Yilin Russell, Armistead G Hu, Yongtao Odman, Mehmet Talat Qian, Yu Archibald, Alexander T Tao, Shu eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2021/11/18 Environ Sci Technol. 2021 Dec 7; 55(23):15625-15636. doi: 10.1021/acs.est.1c01567. Epub 2021 Nov 17" |
