Pyramidal ice crystal scattering phase functions and concentric halos

Pyramidal ice crystal scattering phase functions and concentric halos

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...

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Bibliographic Details
Main Authors: C. Liu, P. R. Jonas, C. P. R. Saunders
Format: Article
Language:English
Published: Copernicus Publications 1996-11-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/14/1192/1996/angeo-14-1192-1996.pdf
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spelling doaj-5540a8b30d524688bcf39d8208a2b7902020-11-24T21:06:11ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05761996-11-01141192119710.1007/s00585-996-1192-2Pyramidal ice crystal scattering phase functions and concentric halosC. Liu0P. R. Jonas1C. P. R. Saunders2Department of Pure and Applied Physics, UMIST, PO Box 88, Manchester M60 1QD, UKDepartment of Pure and Applied Physics, UMIST, PO Box 88, Manchester M60 1QD, UKDepartment of Pure and Applied Physics, UMIST, PO Box 88, Manchester M60 1QD, UKPhase 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.https://www.ann-geophys.net/14/1192/1996/angeo-14-1192-1996.pdf
collection DOAJ
language English
format Article
sources DOAJ
author C. Liu
P. R. Jonas
C. P. R. Saunders
spellingShingle C. Liu
P. R. Jonas
C. P. R. Saunders
Pyramidal ice crystal scattering phase functions and concentric halos
Annales Geophysicae
author_facet C. Liu
P. R. Jonas
C. P. R. Saunders
author_sort C. Liu
title Pyramidal ice crystal scattering phase functions and concentric halos
title_short Pyramidal ice crystal scattering phase functions and concentric halos
title_full Pyramidal ice crystal scattering phase functions and concentric halos
title_fullStr Pyramidal ice crystal scattering phase functions and concentric halos
title_full_unstemmed Pyramidal ice crystal scattering phase functions and concentric halos
title_sort pyramidal ice crystal scattering phase functions and concentric halos
publisher Copernicus Publications
series Annales Geophysicae
issn 0992-7689
1432-0576
publishDate 1996-11-01
description 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.
url https://www.ann-geophys.net/14/1192/1996/angeo-14-1192-1996.pdf
work_keys_str_mv AT cliu pyramidalicecrystalscatteringphasefunctionsandconcentrichalos
AT prjonas pyramidalicecrystalscatteringphasefunctionsandconcentrichalos
AT cprsaunders pyramidalicecrystalscatteringphasefunctionsandconcentrichalos
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