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| Titel |
Pyramidal ice crystal scattering phase functions and concentric halos |
| VerfasserIn |
C. Liu, P. R. Jonas, C. P. R. Saunders |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 14, no. 11 ; Nr. 14, no. 11, S.1192-1197 |
| Datensatznummer |
250012471
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| Publikation (Nr.) |
 copernicus.org/angeo-14-1192-1996.pdf |
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| Zusammenfassung |
| Phase functions have been calculated using
the Monte Carlo/geometric ray tracing method for single hexagonal pyramidal ice
crystals (such as solid and hollow bullets) randomly oriented in space and
horizontal plane, in order to study the concentric halo formations. Results from
three dimensional model calculations show that 9° halo can be as bright as the
common 22° halo for pyramidal angle of 28°, and the 18°, 20°, 24° and 35°
halos cannot be seen due to the strong 22° halo domination in the scattering
phase function between 18° and 35°. For solid pyramidal ice crystals randomly
oriented horizontally, the 35° arc can be produced and its intensity depends on
the incident ray solar angle and the particle aspect ratio. |
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