气候变化领域集成服务门户(CCPortal): Biomass burning related ammonia emissions promoted a self-amplifying loop in the urban environment in Kunming (SW China)

CCPortal

DOI	10.1016/j.atmosenv.2020.118138
	Biomass burning related ammonia emissions promoted a self-amplifying loop in the urban environment in Kunming (SW China)
	Zhou Y.; Zheng N.; Luo L.; Zhao J.; Qu L.; Guan H.; Xiao H.; Zhang Z.; Tian J.; Xiao H.
发表日期	2021
ISSN	1352-2310
卷号	253
英文摘要	Particulate ammonium (NH4+) is one of the most important inorganic components in aerosol. The concentrations of NH4+ in PM2.5 significantly increased when PM2.5 levels elevated. Increased understanding of the atmospheric processes and sources of ambient ammonia is an effective way to control atmospheric ammonia and tackle air pollution problems. This study focused on the concentration and nitrogen stable isotopic composition of particulate NH4+ in PM2.5 in a southwest typical plateau city, Kunming. The trend in NH4+concentrations was parallel to the trend in PM2.5 levels, with obviously increased concentrations observed in November. Aerosol pH and liquid water content (ALWC) were synchronously simulated by the ISORROPIA-II model. And the ammonia gas-particle conversion ratio (f) was calculated for each day. Then, we proposed that a self-amplifying feedback mechanism of NH4+ formation was associated with the variations of ALWC, pH, and the ammonia gas-particle conversion ratio. Based on the inverse analysis of the nitrogen isotopic composition of particulate NH4+, the corresponding δ15N values of initial ambient NH3 were estimated to be −27.4‰–15.3‰, with an average of −8.1 ± 8.3‰. Results from Back trajectory analysis, PSCF analysis, and isotope-based source apportionment of NH3 shed light on source compositions and potential source regions, indicating that, in the study area, ambient NH3 during slightly polluted days were dominated by biomass burning emissions, which might have been originated from local emissions and regional transport process in late autumn. © 2020 Elsevier Ltd
关键词	Ammonia Ammonium Back-trajectories Fire spots Source apportionment δ15N–NH3
语种	英语
scopus关键词	Aerosols; Air pollution; Air pollution control; Atmospheric movements; Isotopes; Nitrogen; Particles (particulate matter); Ammonia gas; Ammonium; Back trajectories; Fire spot; Liquid water content; NH$-3$; Particulates; PM$-2.5$; Source apportionment; Δ15N–NH3; Ammonia; ammonia; nitrogen; nitrogen 15; aerosol composition; air quality; ammonia; atmospheric pollution; biomass burning; concentration (composition); isotopic composition; nitrogen; particulate matter; aerosol; Article; atmosphere; autumn; biomass; chemical reaction; China; combustion; equilibrium constant; feedback system; flow rate; fractionation; gas; geographic distribution; meteorology; monsoon climate; particulate matter 2.5; pH; pollution transport; priority journal; thermodynamics; urban area; water content; wind speed
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/248488
作者单位	State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Key Laboratory of the Causes and Control of Atmospheric Pollution, East China University of Technology, Nanchang, 330000, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
推荐引用方式 GB/T 7714	Zhou Y.,Zheng N.,Luo L.,et al. Biomass burning related ammonia emissions promoted a self-amplifying loop in the urban environment in Kunming (SW China)[J],2021,253.
APA	Zhou Y..,Zheng N..,Luo L..,Zhao J..,Qu L..,...&Xiao H..(2021).Biomass burning related ammonia emissions promoted a self-amplifying loop in the urban environment in Kunming (SW China).ATMOSPHERIC ENVIRONMENT,253.
MLA	Zhou Y.,et al."Biomass burning related ammonia emissions promoted a self-amplifying loop in the urban environment in Kunming (SW China)".ATMOSPHERIC ENVIRONMENT 253(2021).