| Title: | Reactive Chlorine Species Advancing the Atmospheric Oxidation Capacities of Inland Urban Environments |
| Author(s): | Ma W; Chen X; Xia M; Liu Y; Wang Y; Zhang Y; Zheng F; Zhan J; Hua C; Wang Z; Wang W; Fu P; Kulmala M; Liu Y; |
| Address: | "Aerosol and Haze Laboratory, Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. Institute for Atmospheric and Earth System Research, Faculty of Science, University of Helsinki, Helsinki 00014, Finland. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. Asicotech Company Limited, Shanghai 200241, China. Hebei Sailhero Environmental Protection Hi-tech, Ltd, Shijiazhuang 050035, China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Chlorine (Cl) radicals from photolabile chlorine species are highly reactive and can affect the fate of air pollutants in the atmosphere. Although several campaigns have been conducted, typically in coastal environments, long-term observations of reactive chlorine species and their impacts on atmospheric oxidation capacities (AOCs) are lacking. Here, we report nearly full-year observations of Cl(2) and ClNO(2) levels in Beijing and evaluate their impacts on the AOC with a box model coupled with Cl chemistry. Cl radicals promote the circulation of OH-HO(2)-RO(2) by accelerating the OH chain lengths by up to 12.6% on average, hence boosting the AOC, especially in the winter or spring. This promotion effect is nonlinearly dependent on the VOC and NO(x) concentrations, thus leading to a slight shift in ozone formation from a VOC-sensitive regime to a transition regime with seasonal differences. Given the ubiquitous reactive chlorines in polluted inland urban regions, the AOCs and the formation of secondary pollutants will be underestimated if the reactive chlorine species are neglected" |
| Keywords: | Chlorine *Volatile Organic Compounds *Ozone/analysis *Air Pollutants Atmosphere Chlorides atmospheric oxidation capacities inland cities ozone production reactive chlorine species; |
| Notes: | "MedlineMa, Wei Chen, Xin Xia, Men Liu, Yafei Wang, Yuzheng Zhang, Yusheng Zheng, Feixue Zhan, Junlei Hua, Chenjie Wang, Zongcheng Wang, Wei Fu, Peng Kulmala, Markku Liu, Yongchun eng Research Support, Non-U.S. Gov't 2023/09/22 Environ Sci Technol. 2023 Oct 3; 57(39):14638-14647. doi: 10.1021/acs.est.3c05169. Epub 2023 Sep 22" |
