Unusual pyramidal ice in the atmosphere as the origin of elliptical halos

Mika Sillanpää; Jarmo Moilanen; Marko Pekkola; Martti Penttinen; Jari Piikki

doi:10.1364/AO.38.005089

Unusual pyramidal ice in the atmosphere as the origin of elliptical halos

Mika Sillanpää, Jarmo Moilanen, Marko Pekkola, Martti Penttinen, Jari Piikki

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The formation mechanism of elliptical halos and Bottlinger’s rings has long remained uncertain. The current model for elliptical halos requires multiple scattering from two different populations of ice crystals in a complex mode of motion. New evidence indicates that elliptical halos, and possibly Bottlinger’s rings, are due to refraction through ice crystals shaped like obtuse pyramids. This unusual ice crystal may not have been documented previously.

Original language	English
Pages (from-to)	5089-5095
Number of pages	7
Journal	Applied Optics
Volume	38
Issue number	24
DOIs	https://doi.org/10.1364/AO.38.005089
Publication status	Published - 20 Aug 1999
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.38.005089

Cite this

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abstract = "The formation mechanism of elliptical halos and Bottlinger{\textquoteright}s rings has long remained uncertain. The current model for elliptical halos requires multiple scattering from two different populations of ice crystals in a complex mode of motion. New evidence indicates that elliptical halos, and possibly Bottlinger{\textquoteright}s rings, are due to refraction through ice crystals shaped like obtuse pyramids. This unusual ice crystal may not have been documented previously.",

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AU - Pekkola, Marko

AU - Penttinen, Martti

AU - Piikki, Jari

PY - 1999/8/20

Y1 - 1999/8/20

N2 - The formation mechanism of elliptical halos and Bottlinger’s rings has long remained uncertain. The current model for elliptical halos requires multiple scattering from two different populations of ice crystals in a complex mode of motion. New evidence indicates that elliptical halos, and possibly Bottlinger’s rings, are due to refraction through ice crystals shaped like obtuse pyramids. This unusual ice crystal may not have been documented previously.

AB - The formation mechanism of elliptical halos and Bottlinger’s rings has long remained uncertain. The current model for elliptical halos requires multiple scattering from two different populations of ice crystals in a complex mode of motion. New evidence indicates that elliptical halos, and possibly Bottlinger’s rings, are due to refraction through ice crystals shaped like obtuse pyramids. This unusual ice crystal may not have been documented previously.

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M3 - Article

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Unusual pyramidal ice in the atmosphere as the origin of elliptical halos

Abstract

ASJC Scopus subject areas

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