气候变化领域集成服务门户(CCPortal): Summertime aerosol volatility measurements in Beijing; China

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DOI	10.5194/acp-19-10205-2019
	Summertime aerosol volatility measurements in Beijing; China
	Xu W.; Xie C.; Karnezi E.; Zhang Q.; Wang J.; Pandis S.N.; Ge X.; Zhang J.; An J.; Wang Q.; Zhao J.; Du W.; Qiu Y.; Zhou W.; He Y.; Li Y.; Li J.; Fu P.; Wang Z.; Worsnop D.R.; Sun Y.
发表日期	2019
ISSN	16807316
起始页码	10205
结束页码	10216
卷号	19 期号:15
英文摘要	Volatility plays a key role in affecting mass concentrations and the lifetime of aerosol particles in the atmosphere, yet our knowledge of aerosol volatility in relatively polluted environment, e.g., north China, remains poor. Here aerosol volatility in Beijing in summer 2017 and 2018 was measured using a thermodenuder (TD) coupled with an Aerodyne high-resolution aerosol mass spectrometer (AMS) and a soot particle AMS. Our results showed overall similar thermograms for most non-refractory aerosol species compared with those reported in previous studies. However, high mass fraction remaining and NOC=NOC 2 ratio for chloride and nitrate, each above 200 °C, indicated the presence of considerable metallic salts and organic nitrates in Beijing. The volatility distributions of organic aerosol (OA) and four OA factors that were resolved from positive matrix factorization were estimated using a mass transfer model. The ambient OA comprised mainly semi-volatile organic compounds (SVOCs; 63 %) with an average effective saturation concentration (C∗) of 0.55 μg m-3, suggesting overall more volatile properties than OA in megacities of Europe and the US. Further analysis showed that the freshly oxidized secondary OA was the most volatile OA factor (SVOC D 70 %) followed by hydrocarbon-like OA (HOA). In contrast, the volatility of more oxidized oxygenated OA (MO-OOA) was comparable to that of cooking OA with SVOC on average accounting for 60.2 %. We also compared the volatility of ambient and black-carbon-containing OA. Our results showed that the BC-containing primary OA (POA) was much more volatile than ambient POA (C∗ D 0:69 μg m-3 vs. 0.37 μg m-3), while the BC-containing SOA was much less volatile, highlighting the very different composition and properties between BC-containing and ambient aerosol particles. © 2019 Author(s).
语种	英语
scopus关键词	aerosol; black carbon; concentration (composition); hydrocarbon; mass spectrometry; saturation; summer; volatile organic compound; Beijing [Beijing (ADS)]; 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/144219
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; University of Chinese Academy of Sciences, Beijing, 100049, China; Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, United States; Department of Environmental Toxicology, University of California, 1 Shields Ave., Davis, CA 95616, United States; School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China; Aerodyne Research Inc., Billerica, MA 01821, United States; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Earth Sciences Department, Barcelona Supercomputing Center, Barcelona, 08034, Spain; Department of Physics, University of Helsinki, P.O. Box 64, Hel...
推荐引用方式 GB/T 7714	Xu W.,Xie C.,Karnezi E.,et al. Summertime aerosol volatility measurements in Beijing; China[J],2019,19(15).
APA	Xu W..,Xie C..,Karnezi E..,Zhang Q..,Wang J..,...&Sun Y..(2019).Summertime aerosol volatility measurements in Beijing; China.Atmospheric Chemistry and Physics,19(15).
MLA	Xu W.,et al."Summertime aerosol volatility measurements in Beijing; China".Atmospheric Chemistry and Physics 19.15(2019).