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| Titel |
On the analytic approximation of bulk collision rates of non-spherical hydrometeors |
| VerfasserIn |
A. Seifert, U. Blahak, R. Buhr |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 7, no. 2 ; Nr. 7, no. 2 (2014-03-04), S.463-478 |
| Datensatznummer |
250115576
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| Publikation (Nr.) |
 copernicus.org/gmd-7-463-2014.pdf |
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| Zusammenfassung |
| Analytic approximations of the binary collision rates of
hydrometeors are derived for use in bulk microphysical
parameterizations. Special attention is given to non-spherical
hydrometeors like raindrops and snowflakes. The terminal fall
velocity of these particles cannot be sufficiently well approximated
by power-law relations which are used in most microphysical
parameterizations, and therefore an improved formulation is
needed. The analytic approximations of the bulk collision rates
given in this paper are an alternative to look-up tables and can
replace the Wisner approximation, which is used in many atmospheric
models. |
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