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Abstract
The prevailing view for aqueous secondary aerosol formation is that it occurs in clouds and fogs, owing to the large liquid water content compared to minute levels in fine particles. Our research indicates that this view may need reevaluation due to enhancements in aqueous reactions in highly concentrated small particles. Here, we show that low temperature can play a role through a unique effect on particle pH that can substantially modulate secondary aerosol formation. Marked increases in hydroxymethanesulfonate observed under extreme cold in Fairbanks, Alaska, demonstrate the effect. These findings provide insight on aqueous chemistry in fine particles under cold conditions expanding possible regions of secondary aerosol formation that are pH dependent beyond conditions of high liquid water.
Department
Earth Systems Research Center
Publication Date
9-4-2024
Journal Title
Science Advances
Publisher
AAAS
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Campbell, J. R., M. Battaglia, Jr., K. Dingilian, M. Cesler-Maloney, W. Simpson, E. Robinson, P. Decarlo, B. Temime-Roussel, B. D'Anna, A. I. Holen, J. Wu, K. A. Pratt, J. Dibb, A. Nenes, R. Weber, and J. Mao (2024), Enhanced aqueous formation and neutralization of fine atmospheric particles driven by extreme cold, Science Advances,https://www.science.org/doi/10.1126/sciadv.ado4373
Rights
© 2024 The Authors
Comments
This is an open access article published by AAAS in Science Advances in 2024, available online: https://dx.doi.org/10.1126/sciadv.ado4373