| Title: | Response of aerosol composition to the clean air actions in Baoji city of Fen-Wei River Basin |
| Author(s): | Wang Y; Li X; Wang Q; Zhou B; Liu S; Tian J; Hao Q; Li G; Han Y; Hang Ho SS; Cao J; |
| Address: | "School of Public Policy and Administration, Northwestern Polytechnical University, Xi'an, 710129, China. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; Guanzhong Plain Ecological Environment Change and Comprehensive Treatment National Observation and Research Station, China. Electronic address: wangqy@ieecas.cn. Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, College of Geography & Environment, Baoji University of Arts & Sciences, Baoji, 721013, China. Future Lab, Tsinghua University, Beijing, China. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; Guanzhong Plain Ecological Environment Change and Comprehensive Treatment National Observation and Research Station, China. Division of Atmospheric Sciences, Desert Research Institute, Reno, NV89512, United States. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China. Electronic address: cao@loess.llqg.ac.cn" |
| DOI: | 10.1016/j.envres.2022.112936 |
| ISSN/ISBN: | 1096-0953 (Electronic) 0013-9351 (Linking) |
| Abstract: | "The implementation of air pollution control measures could alter the compositions of submicron aerosols. Identifying the changes can evaluate the atmospheric responses of the implemented control measures and provide more scientific basis for the formulation of new measures. The Fen-Wei River Basin is the most air polluted region in China, and thereby is a key area for the reduction of emissions. Only limited studies determine the changes in the chemical compositions of submicron aerosols. In this study, Baoji was selected as a representative city in the Fen-Wei River Basin. The compositions of submicron aerosols were determined between 2014 and 2019. Organic fractions were determined through an online instrument (Quadrupole Aerosol Chemical Speciation Monitor, Q-ACSM) and source recognition was performed by the Multilinear Engine (ME-2). The Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) was also employed to evaluate the contributions of emissions reduction and meteorological conditions to the changes of submicron aerosol compositions. The results indicate that the mass concentrations of submicron aerosols have been substantially decreased after implementation of air pollution control measures. This was mainly attributed to the emission reductions of sulfur dioxide (SO(2)) and primary organic aerosol (POA). In addition, the main components that drove the pollution episodes swapped from POA, sulfate, nitrate and less-oxidized organic (LO-OOA) in 2014 to nitrate and more-oxidized OOA (MO-OOA) in 2019. Due to the changes of chemical compositions of both precursors and secondary pollutants, the pollution control measures should be modernized to focus on the emissions of ammonia (NH(3)), nitrogen oxides (NO(x)) and volatile organic compounds (VOC(s)) in this region" |
| Keywords: | Aerosols/analysis *Air Pollutants/analysis *Air Pollution/analysis/prevention & control China Environmental Monitoring/methods Nitrates Nitrogen Oxides/analysis Particulate Matter/analysis Rivers Air pollution Control measures Fen-Wei River basin Q-acsm S; |
| Notes: | "MedlineWang, Yichen Li, Xia Wang, Qiyuan Zhou, Bianhong Liu, Suixin Tian, Jie Hao, Qiang Li, Guohui Han, Yongming Hang Ho, Steven Sai Cao, Junji eng Netherlands 2022/02/20 Environ Res. 2022 Jul; 210:112936. doi: 10.1016/j.envres.2022.112936. Epub 2022 Feb 16" |
