Abstract

Using a microphysical approach to nucleation, we present an extensive study of water nucleation rates for wide ranges of both temperature and supersaturation ratio. Based on the fundamental molecular properties of clusters instead of bulk properties, the microphysical approach is demonstrated to predict good agreement with measured nucleation rates over this broad range of conditions. Predicted critical sizes for nucleation are found to be relatively small, and are in the molecular cluster size regime rather than in a size regime that should be characterized by bulk values. Estimated sticking coefficient values cover the range of ~0.9 to ~0.2 for the temperature range considered, whereas sticking coefficient values corresponding to Becker-Doring theory suffer an unreasonably large three-orders of magnitude decrease for temperature increase from 220K to 285K.

Department(s)

Physics

Keywords and Phrases

Molecular Cluster; Nucleation Rate; Sticking Coefficient; Supersaturation; Temperature; Water

International Standard Serial Number (ISSN)

0022-4928

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1988 American Meteorological Society, All rights reserved.

Included in

Physics Commons

Share

 
COinS