Articles | Volume 25, issue 21
https://doi.org/10.5194/acp-25-15359-2025
https://doi.org/10.5194/acp-25-15359-2025
Research article
 | 
10 Nov 2025
Research article |  | 10 Nov 2025

Chloric acid-driven nucleation enhanced by dimethylamine and sulfuric acid in the Arctic: mechanistic study

Shengming Wang, Huidi Zhang, Xiangli Shi, Qingzhu Zhang, Wenxing Wang, and Qiao Wang

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Cited articles

Almeida, J., Schobesberger, S., Kürten, A., Ortega, I. K., Kupiainen-Määttä, O., Praplan, A. P., Adamov, A., Amorim, A., Bianchi, F., and Breitenlechner, M.: Molecular understanding of sulphuric acid–amine particle nucleation in the atmosphere, Nature, 502, 359–363, https://doi.org/10.1038/nature12663, 2013. 
Arquero, K. D., Xu, J., Gerber, R. B., and Finlayson-Pitts, B. J.: Particle formation and growth from oxalic acid, methanesulfonic acid, trimethylamine and water: a combined experimental and theoretical study, Physical Chemistry Chemical Physics, 19, 28286–28301, https://doi.org/10.1039/c7cp04468b, 2017. 
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Dawson, M. L., Varner, M. E., Perraud, V., Ezell, M. J., Gerber, R. B., and Finlayson-Pitts, B. J.: Simplified mechanism for new particle formation from methanesulfonic acid, amines, and water via experiments and ab initio calculations, Proceedings of the National Academy of Sciences, 109, 18719–18724, 2012. 
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Recent studies have shown that chloric acid (HClO3, CA) is prevalent in the Arctic boundary layer. However, the mechanism of CA-based nucleation is unclear. We provide molecular-level evidence that CA-dimethylamine (DMA) nucleation may not effectively contribute to Arctic new particle formation (NPF). The proposed CA-DMA nucleation mechanism may help us to deeply understand marine NPF events in the Arctic boundary layer.
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