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Applied Optics

Applied Optics


  • Vol. 39, Iss. 33 — Nov. 20, 2000
  • pp: 6080–6085

Halo observations provide evidence of airborne cubic ice in the Earth’s atmosphere

Marko Riikonen, Mika Sillanpää, Leena Virta, Daniel Sullivan, Jarmo Moilanen, and Ismo Luukkonen  »View Author Affiliations

Applied Optics, Vol. 39, Issue 33, pp. 6080-6085 (2000)

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An ice crystal halo display that contains several previously unknown halo phenomena was observed in Northern Chile. Analysis of computer simulations of the halos demonstrates that most of the new halo arcs in the display can be explained by the presence of airborne and preferentially oriented crystals of cubic ice. These observations therefore provide evidence of the existence of the cubic phase of ice in the Earth’s atmosphere.

© 2000 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.2940) Atmospheric and oceanic optics : Ice crystal phenomena
(290.5850) Scattering : Scattering, particles

Original Manuscript: January 14, 2000
Revised Manuscript: August 29, 2000
Published: November 20, 2000

Marko Riikonen, Mika Sillanpää, Leena Virta, Daniel Sullivan, Jarmo Moilanen, and Ismo Luukkonen, "Halo observations provide evidence of airborne cubic ice in the Earth’s atmosphere," Appl. Opt. 39, 6080-6085 (2000)

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