The formation and evolution of secondary organic aerosol during summer in Xi'an: Aqueous phase processing in fog-rain days

doi:10.1016/j.scitotenv.2020.144077

	The formation and evolution of secondary organic aerosol during summer in Xi'an: Aqueous phase processing in fog-rain days
	Duan, Jing 7; Huang, Ru-Jin 6,7; Gu, Yifang 5,7; Lin, Chunshui 7; Zhong, Haobin 5,7; Wang, Ying 7; Yuan, Wei 5,7; Ni, Haiyan 7; Yang, Lu 7; Chen, Yang 4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-02-20
卷号	756 页码:10
关键词	Secondary organic aerosol Aqueous-phase oxidized organic aerosol Fog-rain days Photochemical oxidation
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.144077
通讯作者	Huang, Ru-Jin(rujin.huang@ieecas.cn)
英文摘要	Secondary organic aerosol (SOA) is an important contributor to organic aerosol (OA), however, the model simulations of SOA concentrations and oxidation states remain significant uncertainties because of inadequate cognition of its formation and aging chemistry. In this study, SOA formation and evolution processes during summer in XIan were investigated, based on high-resolution online measurements of non-refractory PM2.5 (NR-PM2.5) species and OA source apportionment using positive matrix factorization. The results showed that the total SOA, including less oxidized-oxygenated OA (LO-OOA), more oxidized-oxygenated OA (MO-OOA), and aqueous-phase-processed oxygenated OA (aq-OOA), on average constituted 69% of OA, and 43% of NR-PM2.5, suggesting the high atmospheric oxidation capacity and the dominance of SOA during summer in Xi'an. Photochemical oxidation processes dominated the summertime SOA formation both during non-fog-rain days and fog-rain days, which were responsible for the formation of both LO-OOA and MO-OOA. Consistently, LO-OOA and MO-OOA in total contributed 59% to OA during non-fog-rain days and 56% to OA during fog-rain days, respectively. On the contrary, aq-OOA was mainly observed during fog-rain days, which increased dramatically from 2% of OA during non-fog-rain days to 19% of OA during fog-rain days with the mass concentration increasing accordingly from 0.3 mu g m(-3) to 2.5 mu g m(-3). Episodic analyses further highlighted the persistently high RH high aerosol liquid water content (ALWC) was the driving factor of aq-OOA formation, and high O-x condition could further enhance its formation. Meanwhile, air masses from east and southeast were much favorable for the formation of long-time fog-rain days, which facilitated aq-OOA production during summer in Xi'an. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China (NSFC)[41925015] ; National Natural Science Foundation of China (NSFC)[91644219] ; National Natural Science Foundation of China (NSFC)[41877408] ; Chinese Academy of Sciences[ZDBS-LY-DQC001] ; Chinese Academy of Sciences[XDB40000000] ; Cross Innovative Team fund from the State Key Laboratory of Loess and Quaternary Geology[SKLLQGTD1801]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000603487500123
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/12694]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Huang, Ru-Jin
作者单位	1.Natl Univ Ireland Galway, Ryan Inst, Sch Phys, Univ Rd, Galway H91 CF50, Ireland 2.Natl Univ Ireland Galway, Ryan Inst, Ctr Climate & Mr Pollut Studies, Univ Rd, Galway H91 CF50, Ireland 3.Aerodyne Res Inc, Billerica, MA 01821 USA 4.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China 7.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Inst Earth Environm, State Key Lab Loess & Quaternary Geol,Key Lab Aer, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Duan, Jing,Huang, Ru-Jin,Gu, Yifang,et al. The formation and evolution of secondary organic aerosol during summer in Xi'an: Aqueous phase processing in fog-rain days[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,756:10.
APA	Duan, Jing.,Huang, Ru-Jin.,Gu, Yifang.,Lin, Chunshui.,Zhong, Haobin.,...&O'Dowd, Colin.(2021).The formation and evolution of secondary organic aerosol during summer in Xi'an: Aqueous phase processing in fog-rain days.SCIENCE OF THE TOTAL ENVIRONMENT,756,10.
MLA	Duan, Jing,et al."The formation and evolution of secondary organic aerosol during summer in Xi'an: Aqueous phase processing in fog-rain days".SCIENCE OF THE TOTAL ENVIRONMENT 756(2021):10.