An improved method of ice nucleus measurement

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Show simple item record Shih, Chi-Fan G. 2017-06-20T00:48:52Z 2017-06-20T00:48:52Z 1982-09
dc.description Thesis (M.S.) University of Alaska Fairbanks, 1982 en_US
dc.description.abstract Ice nuclei, which initiate the ice nucleation process at a higher temperature than the homogeneous nucleation temperature, are essential for the initiation of the ice phase in clouds. Unfortunately, no standard method has been established for the measurement of ice nucleus concentration. The filter technique is a promising candidate if the tendency for ice nucleus concentrations to decreases as the volume sampled increases can be explained. For this study, an improved ventilation method for the development of exposed filters was developed and tested. The results were compared with results obtained in a static diffusion chamber. The volume effect was observed to be less with the new dynamic system. Further work needs to be done to find the optimum flow rate in order to reduce the vapor depletion problem to a minimum. The ratio of total counts of dynamic and static system appears to be a promising evaluation index. en_US
dc.language.iso en_US en_US
dc.subject Ice nuclei en_US
dc.title An improved method of ice nucleus measurement en_US
dc.type Thesis en_US

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