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Cirrus crystal nucleation by homogeneous freezing of solution dropletsA numerical model consisting of a system of differential equations is used to study cirrus crystal nucleation in a rising parcel containing a distribution of cloud condensation nuclei. The evolution of the particle population and the thermodynamic variables in the parcel are examined. The results suggest that, if homogeneous freezing is not considered, liquid water should be detected below -40 C. If homogeneous freezing is considered, the rapid growth of ice crystals and vapor depletion prevent water saturation from being reached. It is shown that the likelihood of a droplet being frozen is increased by lower temperatures, larger droplet diameter, or lower solution density.
Document ID
19890059874
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Heymsfield, Andrew J.
(National Center for Atmospheric Research Boulder, CO, United States)
Sabin, Robert M.
(National Center for Atmospheric Research Boulder, CO, United States)
Date Acquired
August 14, 2013
Publication Date
July 15, 1989
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 46
ISSN: 0022-4928
Subject Category
Meteorology And Climatology
Accession Number
89A47245
Funding Number(s)
CONTRACT_GRANT: NASA ORDER L-98100-B
Distribution Limits
Public
Copyright
Other

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