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DOI	10.5194/acp-21-17885-2021
	Measurement report: New particle formation characteristics at an urban and a mountain station in northern China
	Zhou Y.; Hakala S.; Yan C.; Gao Y.; Yao X.; Chu B.; Chan T.; Kangasluoma J.; Gani S.; Kontkanen J.; Paasonen P.; Liu Y.; Petäjä T.; Kulmala M.; Dada L.
发表日期	2021
ISSN	1680-7316
起始页码	17885
结束页码	17906
卷号	21 期号:23
英文摘要	Atmospheric new particle formation (NPF) events have attracted increasing attention for their contribution to the global aerosol number budget and therefore their effects on climate, air quality and human health. NPF events are regarded as a regional phenomenon, occurring over a large area. Most observations of NPF events in Beijing and its vicinity were conducted in populated areas, whereas observations of NPF events on mountaintops with low anthropogenic emissions are still rare in China. The spatial variation of NPF event intensity has not been investigated in detail by incorporating both urban areas and mountain measurements in Beijing. Here, we provide NPF event characteristics in summer 2018 and 2019 at urban Beijing and a comparison of NPF event characteristics - NPF event frequency, formation rate and growth rate - by comparing an urban Beijing site and a background mountain site separated by 1/480km from 14 June to 14 July 2019, as well as giving insights into the connection between both locations. During parallel measurements at urban Beijing and mountain background areas, although the median condensation sink during the first 2h of the common NPF events was around 0.01s-1 at both sites, there were notable differences in formation rates between the two locations (median of 5.42cm-3s-1 at the urban site and 1.13cm-3s-1 at the mountain site during the first 2h of common NPF events). In addition, the growth rates in the 7-15nm range for common NPF events at the urban site (median of 7.6nmh-1) were slightly higher than those at the mountain site (median of 6.5nmh-1). To understand whether the observed events were connected, we compared air mass trajectories as well as meteorological conditions at both stations. Favorable conditions for the occurrence of regional NPF events were largely affected by air mass transport. Overall, our results demonstrate a clear inhomogeneity of regional NPF within a distance of 1/4100km, possibly due to the discretely distributed emission sources. © Copyright:
语种	英语
scopus关键词	aerosol; air mass; mass transport; mountain region; particulate matter; spatial variation; urban atmosphere; 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/246382
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; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Joint International Research Laboratory of Atmospheric and Earth System Sciences (JirLATEST), Nanjing University, Nanjing, China; Extreme Environments Research Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis, Sion, 1951, Switzerland; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, 5232, Switzerland
推荐引用方式 GB/T 7714	Zhou Y.,Hakala S.,Yan C.,et al. Measurement report: New particle formation characteristics at an urban and a mountain station in northern China[J],2021,21(23).
APA	Zhou Y..,Hakala S..,Yan C..,Gao Y..,Yao X..,...&Dada L..(2021).Measurement report: New particle formation characteristics at an urban and a mountain station in northern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(23).
MLA	Zhou Y.,et al."Measurement report: New particle formation characteristics at an urban and a mountain station in northern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.23(2021).