气候变化领域集成服务门户(CCPortal): Organic aerosol volatility and viscosity in the North China Plain: Contrast between summer and winter

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DOI	10.5194/acp-21-5463-2021
	Organic aerosol volatility and viscosity in the North China Plain: Contrast between summer and winter
	Xu W.; Chen C.; Qiu Y.; Li Y.; Zhang Z.; Karnezi E.; Pandis S.N.; Xie C.; Li Z.; Sun J.; Ma N.; Xu W.; Fu P.; Wang Z.; Zhu J.; Worsnop D.R.; Lee Ng N.; Sun Y.
发表日期	2021
ISSN	1680-7316
起始页码	5463
结束页码	5476
卷号	21 期号:7
英文摘要	Volatility and viscosity have substantial impacts on gas-particle partitioning, formation and evolution of aerosol and hence the predictions of aerosol-related air quality and climate effects. Here aerosol volatility and viscosity at a rural site (Gucheng) and an urban site (Beijing) in the North China Plain (NCP) in summer and winter were investigated by using a thermodenuder coupled with a highresolution aerosol mass spectrometer. The effective saturation concentration (C) of organic aerosol (OA) in summer was smaller than that in winter (0.55 μgm-3 vs. 0.71- 0.75 μgm-3), indicating that OA in winter in the NCP is more volatile due to enhanced primary emissions from coal combustion and biomass burning. The volatility distributions varied and were largely different among different OA factors. In particular, we found that hydrocarbon-like OA (HOA) contained more nonvolatile compounds compared to coalcombustion- related OA. The more oxidized oxygenated OA (MO-OOA) showed overall lower volatility than less oxidized OOA (LO-OOA) in both summer and winter, yet the volatility of MO-OOA was found to be relative humidity (RH) dependent showing more volatile properties at higher RH. Our results demonstrated the different composition and chemical formation pathways of MO-OOA under different RH levels. The glass transition temperature (Tg) and viscosity of OA in summer and winter are estimated using the recently developed parameterization formula. Our results showed that the Tg of OA in summer in Beijing (291.5 K) was higher than that in winter (289.7-290.0 K), while it varied greatly among different OA factors. The viscosity suggested that OA existed mainly as solid in winter in Beijing (RHD29-17 %), but as semisolids in Beijing in summer (RHD48-25 %) and Gucheng in winter (RHD68-24 %). These results have the important implication that kinetically limited gas-particle partitioning may need to be considered when simulating secondary OA formation in the NCP. © 2021 Georg Thieme Verlag. All rights reserved.
语种	英语
scopus关键词	aerosol formation; organic matter; partitioning; relative humidity; summer; viscosity; winter; Beijing [China]; China; North China Plain
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/246986
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; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China; State Key Laboratory of Severe Weather and Key Laboratory for Atmospheric Chemistry, Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China; Aerodyne Research Inc., Billerica, MA 01821, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA ...
推荐引用方式 GB/T 7714	Xu W.,Chen C.,Qiu Y.,et al. Organic aerosol volatility and viscosity in the North China Plain: Contrast between summer and winter[J],2021,21(7).
APA	Xu W..,Chen C..,Qiu Y..,Li Y..,Zhang Z..,...&Sun Y..(2021).Organic aerosol volatility and viscosity in the North China Plain: Contrast between summer and winter.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(7).
MLA	Xu W.,et al."Organic aerosol volatility and viscosity in the North China Plain: Contrast between summer and winter".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.7(2021).