气候变化领域集成服务门户(CCPortal): Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies

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DOI	10.1029/2019GL086288
	Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies
	Sun Y.; He Y.; Kuang Y.; Xu W.; Song S.; Ma N.; Tao J.; Cheng P.; Wu C.; Su H.; Cheng Y.; Xie C.; Chen C.; Lei L.; Qiu Y.; Fu P.; Croteau P.; Worsnop D.R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:5
英文摘要	Submicron aerosol (PM1) species measured by aerosol mass spectrometers have been widely used to validate chemical transport models; however, the uncertainties due to chemical differences between PM1 and PM2.5 are poorly constrained. Here we characterized such differences in a highly polluted environment in north China in winter. Our results showed that the changes in PM1/PM2.5 ratios as a function of relative humidity (RH) were largely different for primary and secondary species. Secondary organic and inorganic aerosol (SOA and SIA) presented clear decreases in PM1/PM2.5 ratios at RH > 60% during periods with high SIA contributions (>50%), likely driven by the changes in aerosol hygroscopicity and phase states, while the traffic and coal combustion OA had limited dependence on RH. Thermodynamic modeling showed negligible impacts of PM differences on predictions of particle acidity, yet these impacts can cause a difference in aerosol water content by up to 50–70%. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Coal combustion; Pollution; Aerosol mass spectrometers; Chemical transport models; highly polluted environment; Inorganic aerosol; PM2.5; Secondary aerosols; Submicron aerosol; Thermodynamic model; Atmospheric movements; aerosol composition; coal combustion; hygroscopicity; pollution incidence; relative humidity; thermodynamics; uncertainty analysis; water content; China
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170622
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; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; State Key Laboratory of Severe Weather & Key Laboratory for Atmospheric Chemistry, Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, China; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou, China; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany; Institute of Surface-Earth System Science, Tianjin University, Tianjin, China;...
推荐引用方式 GB/T 7714	Sun Y.,He Y.,Kuang Y.,et al. Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies[J],2020,47(5).
APA	Sun Y..,He Y..,Kuang Y..,Xu W..,Song S..,...&Worsnop D.R..(2020).Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies.Geophysical Research Letters,47(5).
MLA	Sun Y.,et al."Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies".Geophysical Research Letters 47.5(2020).