气候变化领域集成服务门户(CCPortal): Increase of High Molecular Weight Organosulfate With Intensifying Urban Air Pollution in the Megacity Beijing

CCPortal

DOI	10.1029/2019JD032200
	Increase of High Molecular Weight Organosulfate With Intensifying Urban Air Pollution in the Megacity Beijing
	Xie Q.; Li Y.; Yue S.; Su S.; Cao D.; Xu Y.; Chen J.; Tong H.; Su H.; Cheng Y.; Zhao W.; Hu W.; Wang Z.; Yang T.; Pan X.; Sun Y.; Wang Z.; Liu C.-Q.; Kawamura K.; Jiang G.; Shiraiwa M.; Fu P.
发表日期	2020
ISSN	2169897X
卷号	125 期号:10
英文摘要	Organosulfates (OSs), a key component of secondary organic aerosols (SOA), account for up to one third of organic matter in the atmosphere. However, high molecular weight (HMW, 500–800 Da) OSs in ambient aerosols are poorly characterized at a molecular level, due to experimental difficulties. With Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICRMS), we are able to identify more than 8,000 OSs in wintertime aerosols in Beijing. We found that both the number and signal magnitudes of HMW OSs with low H/C and O/C ratios and degrees of unsaturation were greatly enhanced during hazy days, indicating that most HMW OSs were freshly formed during stagnant air pollution episodes. They are most likely to be the oxidation products of semivolatility to low-volatility precursors (e.g., polycyclic aromatic hydrocarbons and fatty acids) and have showed a strong influence of anthropogenic emissions. The molecular corridor analysis suggests that the high abundance of HMW aromatic-like and aliphatic OSs considerably decreases the volatility of organic aerosols in the urban atmosphere. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	FT-ICR MS; Organic aerosol; Organosulfates; Secondary organic aerosol; Volatile organic compounds
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186007
作者单位	State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Department of Chemistry, University of California, Irvine, CA, United States; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China; School of Environmental Science and Engineering, Tianjin University, Tianjin, China; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany; Chubu Institute for Advanced Studies, Chubu University, Kasugai, Japan
推荐引用方式 GB/T 7714	Xie Q.,Li Y.,Yue S.,et al. Increase of High Molecular Weight Organosulfate With Intensifying Urban Air Pollution in the Megacity Beijing[J],2020,125(10).
APA	Xie Q..,Li Y..,Yue S..,Su S..,Cao D..,...&Fu P..(2020).Increase of High Molecular Weight Organosulfate With Intensifying Urban Air Pollution in the Megacity Beijing.Journal of Geophysical Research: Atmospheres,125(10).
MLA	Xie Q.,et al."Increase of High Molecular Weight Organosulfate With Intensifying Urban Air Pollution in the Megacity Beijing".Journal of Geophysical Research: Atmospheres 125.10(2020).