气候变化领域集成服务门户(CCPortal): Detailed budget analysis of HONO in Beijing; China: Implication on atmosphere oxidation capacity in polluted megacity

CCPortal

DOI	10.1016/j.atmosenv.2020.117957
	Detailed budget analysis of HONO in Beijing; China: Implication on atmosphere oxidation capacity in polluted megacity
	Liu J.; Liu Z.; Ma Z.; Yang S.; Yao D.; Zhao S.; Hu B.; Tang G.; Sun J.; Cheng M.; Xu Z.; Wang Y.
发表日期	2021
ISSN	13522310
卷号	244
英文摘要	In this study, continuous measurements of HONO and related parameters were carried out at an urban site in Beijing during intense summer and winter campaigns. Highly variable HONO levels were observed ranging from 0.53 ppb to 2.41 ppb in summer and from 0.02 ppb to 3.18 ppb in winter. An additional unknown source with HONO production rates of 2.10 ppb h−1 and 0.87 ppb h−1 were derived, accounting for 86.4% and 70.4% of the total HONO daytime sources in summer and winter, respectively. In order to explore the potential sources and formation pathways of HONO, a zero-dimensional box model (F0AM) based on Master Chemical Mechanism (MCM3.3.1) coupled with six updated HONO sources was used to reveal the HONO chemistry and its impact on atmospheric oxidation capacity. With the additional sources, the simulation results reproduced the observations well, and suggested the HONO concentrations during the summer daytime (7:00–17:00) mainly came from the homogeneous OH + NO reaction (22.0%), photosensitized heterogeneous conversion on aerosol surfaces (19.2%) and direct emission (18.5%). Whereas, photosensitized heterogeneous conversion on aerosol surfaces (29.7%), photosensitized heterogeneous conversion on ground surfaces (24.9%) and direct emission (20.4%) became the three major sources during winter daytime. The surprisingly high OH oxidation rates simulated in the winter campaign, which was significantly underestimated in current MCM, highlighting the urgent need for full consideration of additional HONO sources in the numerical model, especially in the cases of winter haze in megacities of North China. © 2020 Elsevier Ltd
英文关键词	Atmosphere oxidation capacity; Formation pathways; Heterogeneous reactions; HONO
语种	英语
scopus关键词	Aerosols; Atmospheric chemistry; Budget control; Urban growth; Atmospheric oxidation capacity; Continuous measurements; Direct emissions; Formation pathways; Master chemical mechanism; Oxidation capacity; Potential sources; Production rates; Oxidation; nitrous acid; aerosol; atmospheric chemistry; atmospheric pollution; concentration (composition); megacity; oxidation; pollutant source; summer; urban pollution; winter; aerosol; air pollution; Article; atmosphere; boundary layer; China; circadian rhythm; city; concentration (parameter); model; oxidation; priority journal; seasonal variation; simulation; summer; surface property; winter; Beijing [China]; 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/144844
作者单位	Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Environmental Meteorology Forecast Center of Beijing_Tianjin_Hebei, Beijing Meteorological Bureau, Beijing, 100089, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Liu J.,Liu Z.,Ma Z.,et al. Detailed budget analysis of HONO in Beijing; China: Implication on atmosphere oxidation capacity in polluted megacity[J],2021,244.
APA	Liu J..,Liu Z..,Ma Z..,Yang S..,Yao D..,...&Wang Y..(2021).Detailed budget analysis of HONO in Beijing; China: Implication on atmosphere oxidation capacity in polluted megacity.Atmospheric Environment,244.
MLA	Liu J.,et al."Detailed budget analysis of HONO in Beijing; China: Implication on atmosphere oxidation capacity in polluted megacity".Atmospheric Environment 244(2021).