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DOI	10.5194/acp-22-11529-2022
	The effectiveness of the coaaulation sink of 3-10 nm atmospheric particles
	Cai, Runlong; Hakkinen, Ella; Yan, Chao; Jiang, Jingkun; Kulmala, Markku; Kangasluoma, Juha
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	11529
结束页码	11541
卷号	22 期号:17 页码:13
英文摘要	As a major source of ultrafine particles, new particle formation (NPF) occurs frequently in various environments. However, the survival of new particles and the frequent occurrence of NPF events in polluted environments have long been perplexing, since new particles are expected to be scavenged by high coagulation sinks Towards solving these problems, we establish an experimental method and directly measure the effectiveness of the size-dependent coagulation sink of monodisperse 3-10 nm particles in well-controlled chamber experiments. Based on the chamber experiments and long-term atmospheric measurements from Beijing, we then discuss the survival of new particles in polluted environments. In the chamber experiments, the measured coagulation sink of 3-10 nm particles increases significantly with a decreasing particle size, whereas it is not sensitive to the compositions of test particles. Comparison between the measured coagulation coefficient with theoretical predictions shows that almost every coagulation leads to the scavenging of one particle, and the coagulation sink exceeds the hard-sphere kinetic limit due to van der Waals attractive force. For urban Beijing, the effectiveness of the coagulation sink and a moderate or high (e.g., > 3 nm h(-1)) growth rate of new particles can explain the occurrence of measured NPF events; the moderate growth rate further implies that, in addition to gaseous sulfuric acid, other gaseous precursors also contribute to the growth of new particles.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000850451000001
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/273327
作者单位	University of Helsinki; Beijing University of Chemical Technology; Tsinghua University
推荐引用方式 GB/T 7714	Cai, Runlong,Hakkinen, Ella,Yan, Chao,et al. The effectiveness of the coaaulation sink of 3-10 nm atmospheric particles[J],2022,22(17):13.
APA	Cai, Runlong,Hakkinen, Ella,Yan, Chao,Jiang, Jingkun,Kulmala, Markku,&Kangasluoma, Juha.(2022).The effectiveness of the coaaulation sink of 3-10 nm atmospheric particles.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(17),13.
MLA	Cai, Runlong,et al."The effectiveness of the coaaulation sink of 3-10 nm atmospheric particles".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.17(2022):13.