气候变化领域集成服务门户(CCPortal): Vertical distribution of particle-phase dicarboxylic acids; oxoacids and α dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing

CCPortal

DOI	10.5194/acp-20-10331-2020
	Vertical distribution of particle-phase dicarboxylic acids; oxoacids and α dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing
	Zhao W.; Ren H.; Kawamura K.; Du H.; Chen X.; Yue S.; Xie Q.; Wei L.; Li P.; Zeng X.; Kong S.; Sun Y.; Wang Z.; Fu P.
发表日期	2020
ISSN	1680-7316
起始页码	10331
结束页码	10350
卷号	20 期号:17
英文摘要	Vertical distributions of dicarboxylic acids, oxoacids, dicarbonyls and other organic tracer compounds in fine aerosols (PM2:5) were investigated at three heights (8, 120 and 260 m) based on a 325m meteorological tower in urban Beijing in the summer of 2015. Results showed that the concentrations of oxalic acid (C2), the predominant diacid, were more abundant at 120m (210154 ngm3) and 260m (220140 ngm3) than those at the ground surface (16090 ngm3). Concentrations of phthalic acid (Ph) decreased with the increase in height, indicating that local vehicular exhausts were the main contributor. Positive correlations were noteworthy for C2 = total diacids with mass ratios of C2 to main oxoacids (Pyr and !C2) and-dicarbonyls (Gly and MeGly) in polluted days (0:42 r2 0:65), especially at the ground level. In clean days, the ratios of carbon content in oxalic acid to water-soluble organic carbon (C2C= WSOC) showed larger values at 120 and 260m than those at the ground surface. However, in polluted days, the C2C=WSOC ratio mainly reached its maximum at ground level. These phenomena may indicate the enhanced contribution of aqueous-phase oxidation to oxalic acid in polluted days. Combined with the influence of wind field, total diacids, oxoacids and-dicarbonyls decreased by 22% 58% under the control on anthropogenic activities during the 2015 Victory Parade period. Furthermore, the positive matrix factorisation (PMF) results showed that the secondary formation routes (secondary sulfate formation and secondary nitrate formation) were the dominant contributors (37 % 44 %) to organic acids, followed by biomass burning (25 % 30 %) and motor vehicles (18 % 24 %). In this study, the organic acids at ground level were largely associated with local traffic emissions, while the long-range atmospheric transport followed by photochemical ageing contributed more to diacids and related compounds in the urban boundary layer than the ground surface in Beijing. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	atmospheric chemistry; atmospheric transport; boundary layer; human activity; photochemistry; trace element; vertical distribution; Beijing [China]; China
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141118
作者单位	State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin, 300072, China; Institute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, Japan; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Chubu Institute for Advanced Studies, Chubu University, Kasugai, 487-8501, Japan; Department of Atmospheric Science, School of Environmental Sciences, China University of Geosciences, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Zhao W.,Ren H.,Kawamura K.,et al. Vertical distribution of particle-phase dicarboxylic acids; oxoacids and α dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing[J],2020,20(17).
APA	Zhao W..,Ren H..,Kawamura K..,Du H..,Chen X..,...&Fu P..(2020).Vertical distribution of particle-phase dicarboxylic acids; oxoacids and α dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing.Atmospheric Chemistry and Physics,20(17).
MLA	Zhao W.,et al."Vertical distribution of particle-phase dicarboxylic acids; oxoacids and α dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing".Atmospheric Chemistry and Physics 20.17(2020).