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Measurements of natural ice nuclei with a continuous flow diffusion chamberA description is given of a continuous flow diffusion chamber technique for measuring the atmospheric concentrations of natural C-F nuclei. It is noted that the same device can also measure deposition nuclei; these two modes can thus be separated and compared. The laminar flow characteristics allow the temperature and supersaturation to be calculated with a high degree of precision and confidence. The method avoids the problems of a supporting substrate and of concentrating the sample into a small volume (as for membrane filters). The present measurements of natural ice nucleus concentrations at +1 percent water supersaturation are found to be comparable to research aircraft measurements of ice crystal concentrations in winter cap clouds over Elk Mountain, Wyoming (Vali et al., 1982).
Document ID
19830068475
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rogers, D. C.
(Wyoming, University Laramie, WY, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: Conference on Cloud Physics
Location: Chicago, IL
Start Date: November 15, 1982
End Date: November 18, 1982
Accession Number
83A49693
Funding Number(s)
CONTRACT_GRANT: NSF ATM-77-17540
CONTRACT_GRANT: NAS8-33150
Distribution Limits
Public
Copyright
Other

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