气候变化领域集成服务门户(CCPortal): Size-resolved particle number emissions in Beijing determined from measured particle size distributions

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DOI	10.5194/acp-20-11329-2020
	Size-resolved particle number emissions in Beijing determined from measured particle size distributions
	Kontkanen J.; Deng C.; Fu Y.; Dada L.; Zhou Y.; Cai J.; Daellenbach K.R.; Hakala S.; Kokkonen T.V.; Lin Z.; Liu Y.; Wang Y.; Yan C.; Petäjä T.; Jiang J.; Kulmala M.; Paasonen P.
发表日期	2020
ISSN	16807316
起始页码	11329
结束页码	11348
卷号	20 期号:19
英文摘要	The climate and air quality effects of aerosol particles depend on the number and size of the particles. In urban environments, a large fraction of aerosol particles originates from anthropogenic emissions. To evaluate the effects of different pollution sources on air quality, knowledge of size distributions of particle number emissions is needed. Here we introduce a novel method for determining size-resolved particle number emissions, based on measured particle size distributions. We apply our method to data measured in Beijing, China, to determine the number size distribution of emitted particles in a diameter range from 2 to 1000 nm. The observed particle number emissions are dominated by emissions of particles smaller than 30 nm. Our results suggest that traffic is the major source of particle number emissions with the highest emissions observed for particles around 10 nm during rush hours. At sizes below 6 nm, clustering of atmospheric vapors contributes to calculated emissions. The comparison between our calculated emissions and those estimated with an integrated assessment model GAINS (Greenhouse Gas and Air Pollution Interactions and Synergies) shows that our method yields clearly higher particle emissions at sizes below 60 nm, but at sizes above that the two methods agree well. Overall, our method is proven to be a useful tool for gaining new knowledge of the size distributions of particle number emissions in urban environments and for validating emission inventories and models. In the future, the method will be developed by modeling the transport of particles from different sources to obtain more accurate estimates of particle number emissions. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; air quality; atmospheric pollution; emission inventory; particle size; pollutant source; size distribution; traffic emission; 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/143917
作者单位	Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China; Institute for Atmospheric and Earth System Research (Physics), Faculty of Science, University of Helsinki, Helsinki, Finland; State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China; Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
推荐引用方式 GB/T 7714	Kontkanen J.,Deng C.,Fu Y.,et al. Size-resolved particle number emissions in Beijing determined from measured particle size distributions[J],2020,20(19).
APA	Kontkanen J..,Deng C..,Fu Y..,Dada L..,Zhou Y..,...&Paasonen P..(2020).Size-resolved particle number emissions in Beijing determined from measured particle size distributions.Atmospheric Chemistry and Physics,20(19).
MLA	Kontkanen J.,et al."Size-resolved particle number emissions in Beijing determined from measured particle size distributions".Atmospheric Chemistry and Physics 20.19(2020).