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Toward a Comprehensive Model of Snow Crystal Growth: 9. Characterizing Structure-Dependent Attachment Kinetics near -4 C

Libbrecht, Kenneth G. (2020) Toward a Comprehensive Model of Snow Crystal Growth: 9. Characterizing Structure-Dependent Attachment Kinetics near -4 C. . (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20201203-151015297

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Abstract

In this paper I examine snow crystal growth near -4 C in comparison with a comprehensive model that includes Structure-Dependent Attachment Kinetics (SDAK). Together with the previous paper in this series that investigated growth near 14 C, I show that a substantial body of experimental data now supports the existence of pronounced 'SDAK dips' on basal surfaces near -4 C and on prism surfaces near -14 C. In both cases, the model suggests that edge-associated surface diffusion greatly reduces the nucleation barrier on narrow facet surfaces relative to that found on broad facets. The remarkable quantitative similarities in the growth behaviors near -4 C and -14 C suggest that these two SDAK features arise from essentially the same physical mechanism occurring at different temperatures on the two principal facets. When applied to atmospheric snow crystal formation, this comprehensive model can explain the recurrent morphological transitions between platelike and columnar growth seen in the Nakaya diagram.


Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/2011.02353arXivDiscussion Paper
ORCID:
AuthorORCID
Libbrecht, Kenneth G.0000-0002-8744-3298
Record Number:CaltechAUTHORS:20201203-151015297
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20201203-151015297
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106896
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:05 Dec 2020 01:33
Last Modified:05 Dec 2020 01:33

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