Articles | Volume 16, issue 20
https://doi.org/10.5194/acp-16-13359-2016
https://doi.org/10.5194/acp-16-13359-2016
Research article
 | 
28 Oct 2016
Research article |  | 28 Oct 2016

Effect of particle surface area on ice active site densities retrieved from droplet freezing spectra

Hassan Beydoun, Michael Polen, and Ryan C. Sullivan

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Short summary
A particle's surface is treated as a continuum of ice nucleation sites with a Gaussian distribution of freezing ability to predict particle-induced freezing of cloud droplets. This does not require prescribing the size or number of active sites. Analysis of droplet freezing spectra revealed a critical total surface area threshold, above which the variability of active site ability saturates. Below this threshold an apparently higher ice active site density (ns) is retrieved for the same system.
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