气候变化领域集成服务门户(CCPortal): Impact of aging on the sources, volatility, and viscosity of organic aerosols in Chinese outflows

CCPortal

DOI	10.5194/acp-23-611-2023
	Impact of aging on the sources, volatility, and viscosity of organic aerosols in Chinese outflows
	Feng, Tingting; Wang, Yingkun; Hu, Weiwei; Zhu, Ming; Song, Wei; Chen, Wei; Sang, Yanyan; Fang, Zheng; Deng, Wei; Fang, Hua; Yu, Xu; Wu, Cheng; Yuan, Bin; Huang, Shan; Shao, Min; Huang, Xiaofeng; He, Lingyan; Lee, Young Ro; Huey, Lewis Gregory; Canonaco, Francesco; Prevot, Andre S. H.; Wang, Xinming
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	611
结束页码	636
卷号	23 期号:1 页码:26
英文摘要	To investigate the impact of aging on the sources, volatility, and viscosity of organic aerosol (OA) in Chinese outflows, a high-resolution time-of-flight aerosol mass spectrometer (HR-AMS) coupled with a thermodenuder (TD) was deployed in the spring of 2018 in Dongying, which is a regional receptor site of metropolitan emissions in the North China Plain (NCP). The average mass concentration of PM1 is 31.5 +/- 22.7 mu gm(-3), which is mainly composed of nitrate (33 %) and OA (25 %). The source apportionment results show that the OA is mainly contributed by oxygenated OA (OOA) from secondary sources, including background-OOA (33 %) representing a background concentration of OA (2.6 mu gm(-3)) in the NCP area, and transported-OOA (33 %) oxidized from urban emissions. The other two factors include aged hydrocarbon-liked OA (aged-HOA, 28 %) from transported vehicle emissions and biomass burning OA (BBOA, 5 %) from local open burning. The volatility of total OA (average C=3.2x10(-4) mu gm(-3)) in this study is generally lower than that reported in previous field studies, which is mainly due to the high OA oxidation level resulting from aging processes during transport. The volatilities of OA factors follow the order of background-OOA (average C=2.7x10(-5) mu gm(-3)) < transported-OOA (3.7x10(-4)mu gm(-3))< aged-HOA (8.1x10(-4)mu gm(-3))< BBOA (0.012 mu gm(-3)). Extremely low volatilities in ambient air indicate that oligomers may exist in aged plumes. The viscosity estimation suggests that the majority of ambient OA in this study behaves as semisolid (60 %), liquifies at higher relative humidity (RH) (21 %), and solidifies (19 %) during noon when the RH is low and the oxidation level is high. Finally, the estimated mixing time of molecules in 200 nm OA varies dramatically from minutes at night to years in the afternoon, emphasizing the need to consider its dynamic kinetic limits when modeling OA. In general, the overall results of this study improve our understanding of the impact of aging on OA volatility and viscosity.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000916534900001
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/273186
作者单位	Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Chinese Academy of Sciences; Jinan University; Jinan University; University Town of Shenzhen; University System of Georgia; Georgia Institute of Technology; Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; Anhui Normal University
推荐引用方式 GB/T 7714	Feng, Tingting,Wang, Yingkun,Hu, Weiwei,et al. Impact of aging on the sources, volatility, and viscosity of organic aerosols in Chinese outflows[J],2023,23(1):26.
APA	Feng, Tingting.,Wang, Yingkun.,Hu, Weiwei.,Zhu, Ming.,Song, Wei.,...&Wang, Xinming.(2023).Impact of aging on the sources, volatility, and viscosity of organic aerosols in Chinese outflows.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(1),26.
MLA	Feng, Tingting,et al."Impact of aging on the sources, volatility, and viscosity of organic aerosols in Chinese outflows".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.1(2023):26.