Preprints
https://doi.org/10.5194/acp-2020-1301
https://doi.org/10.5194/acp-2020-1301

  04 Feb 2021

04 Feb 2021

Review status: this preprint is currently under review for the journal ACP.

Impact of aerosol-radiation interaction on new particle formation

Gang Zhao1, Yishu Zhu1, Zhijun Wu1, Taomou Zong1, Jingchuan Chen1, Tianyi Tan1, Haichao Wang1, Xin Fang1, Keding Lu1, Chunsheng Zhao2, and Min Hu1 Gang Zhao et al.
  • 1State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
  • 2Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China

Abstract. New particle formation (NPF) is thought to contribute to half of the global cloud condensation nuclei. A better understanding of the NPF at different altitudes can help assess the impact of NPF on cloud formation and corresponding physical properties. However, NPF is not sufficiently understood in the upper boundary layer because previous studies mainly focus on ground-level measurements. In this study, the developments of aerosol size distribution at different altitudes are characterized based on the field measurement conducted in January 2019, in Beijing, China. We find that the partition of nucleation mode particles at the upper boundary layer is larger than that at the ground, which implies that the nucleation processing is more likely to happen in the upper boundary layer than that at the ground. Results of the radiative transfer model show that the photolysis rates of the nitrogen dioxide and ozone increase with altitude within the boundary layer, which lead to a higher concentration of sulfuric acid at the upper boundary layer than that at the ground. Therefore, the nucleation processing in the upper boundary layer should be stronger than that at the ground, which is consistent with our measurement results. Our study emphasizes the influence of aerosol-radiation interaction on the NPF. These results have the potential to improve our understanding of source of cloud condensation nuclei in global scale due to the impacts of aerosol-radiation interaction.

Gang Zhao et al.

Status: open (until 01 Apr 2021)

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Gang Zhao et al.

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Short summary
New particle formation is thought to contribute to half of the global cloud condensation nuclei. We find that the new particle formation is more likely to happen in the upper boundary layer than that at the ground, which can be patially explained by the aerosol-radiation interaction. Our study emphasizes the influence of aerosol-radiation interaction on the NPF.
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