Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 20, issue 2
Articles | Volume 20, issue 2
https://doi.org/10.5194/acp-20-683-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-683-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 2
Research article
 | 
21 Jan 2020
Research article |  | 21 Jan 2020

Modelling the effect of condensed-phase diffusion on the homogeneous nucleation of ice in ultra-viscous particles

Kathryn Fowler, Paul Connolly, and David Topping

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Latest update: 23 Oct 2025
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Short summary
Observations of low–temperature cirrus clouds have found unexpectedly low ice crystal numbers and high supersaturations, suggesting an incomplete understanding of the freezing mechanisms under these conditions. The existence of viscous organic aerosol has offered alternative ice nucleation pathways, which have been observed in laboratory studies. We have developed the first cloud parcel model to investigate the effect of viscosity on ice nucleation.
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