Editorial Type:
Article
Article Type:
Research Article

Humidity Required for Ice Nucleation from the Vapor onto Silver Iodide and Lead Iodide Aerosols over the Temperature Range −6 to −67°C

Andrew G. Detwiler State University of New York at Albany, Albany, NY 12222

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Bernard Vonnegut State University of New York at Albany, Albany, NY 12222

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Print Publication:
01 Sep 1981
DOI:
https://doi.org/10.1175/1520-0450(1981)020<1006:HRFINF>2.0.CO;2
Page(s):
1006–1012
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Abstract

The ice saturation ratio at which 1% of aged silver iodide and lead iodide aerosol particles nucleate ice from moist air is observed to depend on temperature. Between roughly −30 and −67°C the threshold for both aerosol types rises slowly with decreasing temperature in agreement with a simple classical nucleation theory. Between −6 and −30°C the threshold for the silver iodide aerosol rises more rapidly than predicted by simple theory while the threshold for lead iodide decreases.

Abstract

The ice saturation ratio at which 1% of aged silver iodide and lead iodide aerosol particles nucleate ice from moist air is observed to depend on temperature. Between roughly −30 and −67°C the threshold for both aerosol types rises slowly with decreasing temperature in agreement with a simple classical nucleation theory. Between −6 and −30°C the threshold for the silver iodide aerosol rises more rapidly than predicted by simple theory while the threshold for lead iodide decreases.

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Cover Journal of Applied Meteorology and Climatology
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