气候变化领域集成服务门户(CCPortal): Variation of size-segregated particle number concentrations in wintertime Beijing

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DOI	10.5194/acp-20-1201-2020
	Variation of size-segregated particle number concentrations in wintertime Beijing
	Zhou Y.; Dada L.; Liu Y.; Fu Y.; Kangasluoma J.; Chan T.; Yan C.; Chu B.; Daellenbach K.R.; Bianchi F.; Kokkonen T.V.; Liu Y.; Kujansuu J.; Kerminen V.-M.; Petäjä T.; Wang L.; Jiang J.; Kulmala M.
发表日期	2020
ISSN	16807316
起始页码	1201
结束页码	1216
卷号	20 期号:2
英文摘要	The spatial and temporal variability of the number size distribution of aerosol particles is an indicator of the dynamic behavior of Beijing's atmospheric pollution cocktail. This variation reflects the strength of different primary and secondary sources, such as traffic and new particle formation, as well as the main processes affecting the particle population. In this paper, we report size-segregated particle number concentrations observed at a newly developed Beijing station during the winter of 2018. Our measurements covered particle number size distributions over the diameter range of 1.5 nm-1 μm (cluster mode, nucleation mode, Aitken mode and accumulation mode), thus being descriptive of a major fraction of the processes taking place in the atmosphere of Beijing. Here we focus on explaining the concentration variations in the observed particle modes, by relating them to the potential aerosol sources and sinks, and on understanding the connections between these modes. We considered haze days and new particle formation event days separately. Our results show that during the new particle formation (NPF) event days increases in cluster mode particle number concentration were observed, whereas during the haze days high concentrations of accumulation mode particles were present. There was a tight connection between the cluster mode and nucleation mode on both NPF event and haze days. In addition, we correlated the particle number concentrations in different modes with concentrations of trace gases and other parameters measured at our station. Our results show that the particle number concentration in all the modes correlated with NOx , which reflects the contribution of traffic to the whole submicron size range. We also estimated the contribution of ion-induced nucleation in Beijing, and we found this contribution to be negligible. © Author(s) 2020.
关键词	air quality atmospheric pollution cluster analysis concentration (composition)parameter estimation particle size size distribution spatial variation temporal variation traffic emission Beijing [China]China
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132265
推荐引用方式 GB/T 7714	Zhou Y.,Dada L.,Liu Y.,et al. Variation of size-segregated particle number concentrations in wintertime Beijing[J]. Atmospheric Chemistry and Physics,2020,20(2).
APA	Zhou Y..,Dada L..,Liu Y..,Fu Y..,Kangasluoma J..,...&Kulmala M..(2020).Variation of size-segregated particle number concentrations in wintertime Beijing.,20(2).
MLA	Zhou Y.,et al."Variation of size-segregated particle number concentrations in wintertime Beijing".20.2(2020).