title: The impact of the "Air Pollution Prevention and Control Action Plan" on PM2.5concentrations in Jing-Jin-Ji region during 2012-2020.
abstract: In order to cope with heavy haze pollution in China, the Air Pollution Prevention and Control Action Plan including phased goals of the fine particulate matter (PM2.5) was issued in 2013. In this study, China's emission inventories in the baseline 2012 and the future scenarios of 2017 and 2020 have been developed based on this Action Plan. Beijing-Tianjin-Hebei (Jing-Jin-Ji) region, one of the most polluted regions in China, was taken as a case to assess the impact of phased emission control measures on PM2.5concentration reduction using WRF-CMAQ model system. With the implementation of the Action Plan, the emissions of sulfur dioxide (SO2), nitrogen oxides (NOX),PM2.5, non-methane volatile organic compound (NMVOC), and ammonia (NH3) in 2017 will decrease by36%, 31%, 30%,12%, and -10% from the 2012 levels in Jing-Jin-Ji, respectively. In 2020, the emissions of SO2, NOX,PM2.5, NMVOC, and NH3will decrease by 40%, 44%, 40%, 22%, and -3% from the 2012 levels in Jing-Jin-Ji, respectively. Consequently, the ambient annual PM2.5concentration under the scenarios of 2017 and 2020 will be 28.3% and 37.8% lower than those in 2012, respectively. The Action Plan provided an effective approach to alleviate PM2.5pollution level in Jing-Jin-Ji region. However, emission control of NMVOC and NH3should be paid more attention and be strengthened in future. Meanwhile, emission control of NOx, SO2, NH3and NMVOC synergistically are highly needed in the future because multiple pollutants impact on PM2.5and O3concentrations nonlinearly.
authors.affiliation: School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China.
authors.forename: Siyi
authors.initials: S
authors.lastname: Cai
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
authors.forename: Yangjun
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Joint Institute for Regional Earth System Science and Engineering and Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA 90095, USA.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhao
authors.affiliation: School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China. Electronic address: shxwang@tsinghua.edu.cn.
authors.forename: Shuxiao
authors.initials: S
authors.lastname: Wang
authors.affiliation: School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Chang
authors.affiliation: School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China.
authors.forename: Jiming
authors.initials: J
authors.lastname: Hao
keywords: Air pollution prevention and control action plan; CMAQ; Emission inventory; PM(2.5) concentration