Significant effects of transport on nanoparticles during new particle formation events in the atmosphere of Beijing (Open Access)--颗粒学报PARTICUOLOGY

Shang, D., Hu, M., Tang, L., Fang, X., Liu, Y., Wu, Y., . . . Zhang, Y. (2023). Significant effects of transport on nanoparticles during new particle formation events in the atmosphere of Beijing. Particuology, 80, 1-10. https://doi.org/10.1016/j.partic.2022.12.006

Significant effects of transport on nanoparticles during new particle formation events in the atmosphere of Beijing (Open Access)

Dongjie Shang ^a, Min Hu ^{a b *}, Lizi Tang ^a, Xin Fang ^a, Ying Liu ^a, Yusheng Wu ^a, Zhuofei Du ^a, Xuhui Cai ^a, Zhijun Wu ^{a b}, Shengrong Lou ^d, Mattias Hallquist ^c, Song Guo ^{a b}, Yuanhang Zhang ^{a b}

a State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, International Joint Laboratory for Regional Pollution Control, Ministry of Education (IJRC), Peking University, Beijing, 100871, China
b Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing, 210044, China
c Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, 41296, Sweden
d Shanghai Academy of Environmental Sciences, Shanghai, 200233, China

10.1016/j.partic.2022.12.006

Volume 80, September 2023, Pages 1-10

Received 27 October 2022, Revised 12 December 2022, Accepted 14 December 2022, Available online 9 January 2023, Version of Record 1 March 2023.

E-mail: minhu@pku.edu.cn

Highlights

• Both “polluted” (28%) and “clean” (22%) NPF events were observed in Beijing.

• The “polluted” NPF were influenced by both transport and local nucleation-growth.

• Transport was contributing (40%) to particle number concentrations in 6–25 nm during “polluted” NPF.

Abstract

The mechanisms of new particle formation (NPF) events that occurred under high aerosol loadings (“polluted” NPF) in the atmosphere have been unclear, which has inhibited the precision of particle pollution control. To deepen the understanding of how the “polluted” NPF events occur, a one-month comprehensive measurement was conducted in the atmosphere of Beijing during the summer of 2016. The “clean” NPF events (frequency = 22%) (condensation sink, CS < 0.015 s⁻¹) were found to be caused by local nucleation and growth. The “polluted” NPF events (frequency = 28%) (CS > 0.015 s⁻¹) were influenced by both local nucleation-growth and regional transport, and the contributions from the two factors to 6–25 nm particle number concentration were 60% and 40%, respectively. This study emphasized the importance of the transport for nanoparticles in relatively polluted atmospheres, and for that the regional joint particle pollution control would be an essential policy.

Graphical abstract

Keywords

New particle formation; Transport; Nanoparticles; Sulfuric acid

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