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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 24 — Aug. 20, 1999
  • pp: 5089–5095

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

Mika Sillanpää, Jarmo Moilanen, Marko Pekkola, Martti Penttinen, and Jari Piikki  »View Author Affiliations


Applied Optics, Vol. 38, Issue 24, pp. 5089-5095 (1999)
http://dx.doi.org/10.1364/AO.38.005089


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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.

© 1999 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.2940) Atmospheric and oceanic optics : Ice crystal phenomena

History
Original Manuscript: October 12, 1998
Revised Manuscript: May 13, 1999
Published: August 20, 1999

Citation
Mika Sillanpää, Jarmo Moilanen, Marko Pekkola, Martti Penttinen, and Jari Piikki, "Unusual pyramidal ice in the atmosphere as the origin of elliptical halos," Appl. Opt. 38, 5089-5095 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-24-5089


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References

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