气候变化领域集成服务门户(CCPortal): Impacts of chlorine emissions on secondary pollutants in China

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DOI	10.1016/j.atmosenv.2020.118177
	Impacts of chlorine emissions on secondary pollutants in China
	Zhang Y.; Liu J.; Tao W.; Xiang S.; Liu H.; Yi K.; Yang H.; Xu J.; Wang Y.; Ma J.; Wang X.; Hu J.; Wan Y.; Wang X.; Tao S.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	The identified components of fine particulate matter with dynamic diameters less than 2.5 μm (PM2.5) suggests the remarkable increase in Cl− in PM2.5 during autumn and winter over North China. Anthropogenic chlorine emissions, including those from biomass burning, coal combustion and biofuel burning, are the main sources of Cl−, which could potentially affect the formation of secondary pollutants in the troposphere. In this study, we resolve the effect of chlorine emissions on PM2.5 and O3 by using the Weather Research and Forecasting (WRF) model coupled with Chemistry (WRF-Chem model) with an updated chemistry mechanism that includes the gaseous chemistry of chlorine, N2O5 heterogeneous reactions and detailed aqueous chemistry. Additionally, the biomass burning emissions of chlorine are derived from the Fire Inventory of the National Center for Atmospheric Research (NCAR) (FINN), which are considered the main contributor to atmospheric chloride over inland areas. The improved model is able to simulate the atmospheric Cl− in PM2.5 with reasonable agreement with the available observations in China. In addition, this model reduces the mean bias of ground-level PM2.5 concentrations from −7.5% to 3.2% over the BTH area and from −11.6% to −0.4% over the Northeast China Plain (NEP). The model also slightly improves O3 simulations by reducing the mean bias from 25.3% to 23.9% over mainland China. The anthropogenic chlorine emissions are estimated to increase the monthly average PM2.5 by 7.5 μg/m3 (9.1%), whereas ozone decreases slightly by up to 2.1 ppbv (4.3%) in November 2014. The influence of ozone was more significant in summer, reaching 2–8 ppbv over the biomass burning regions in 2014. The increase in Cl− and NH4+ accounted for the impacts on PM2.5, and the decline in O3 could be explained by the cycle between chlorine radicals and gases and changes in precursor concentrations. Our results suggest the importance of chlorine emissions and their chemical processes in the formation of PM2.5 and O3 over high-emission regions in China. © 2021 Elsevier Ltd
关键词	Biomass burning Chlorine emission Ozone formation Particulate matter WRF-Chem model
语种	英语
scopus关键词	Air pollution; Atmospheric chemistry; Biomass; Chlorine compounds; Coal combustion; Ozone; Weather forecasting; Biomass burning emissions; Biomass burning regions; Fine particulate matter; Heterogeneous reactions; National center for atmospheric researches; PM2.5 concentration; Precursor concentration; Weather research and forecasting models; Chlorine; ammonia; chlorine; ozone; biofuel; biomass burning; chlorine; concentration (composition); numerical model; weather forecasting; air pollutant; aqueous solution; Article; biomass; chemical reaction; chemistry; China; exhaust gas; particulate matter 2.5; precursor; priority journal; summer; China
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248628
作者单位	Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Univ North Carolina Chapel Hill, Environm Sci & Engn, Chapel Hill, NC, United States; Institute of Science and Technology, China Three Gorges Corporation, Beijing, 100038, China; Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106, United States
推荐引用方式 GB/T 7714	Zhang Y.,Liu J.,Tao W.,et al. Impacts of chlorine emissions on secondary pollutants in China[J],2021,246.
APA	Zhang Y..,Liu J..,Tao W..,Xiang S..,Liu H..,...&Tao S..(2021).Impacts of chlorine emissions on secondary pollutants in China.ATMOSPHERIC ENVIRONMENT,246.
MLA	Zhang Y.,et al."Impacts of chlorine emissions on secondary pollutants in China".ATMOSPHERIC ENVIRONMENT 246(2021).