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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 4, Iss. 3 — Mar. 1, 1987
  • pp: 591–599

Multiple-scattering effects in halo phenomena

E. Tränkle and Robert G. Greenler  »View Author Affiliations


JOSA A, Vol. 4, Issue 3, pp. 591-599 (1987)
http://dx.doi.org/10.1364/JOSAA.4.000591


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Abstract

Using a hit-and-miss Monte Carlo method, we followed many paths of Sun rays through a layer of hexagonal ice crystals. The angle of scattering by a single crystal is determined by tracing the path of the Sun rays through the crystal with its particular orientation. In this way we produced point plots of the intensity of the scattered sunlight for a specified population of crystals. By comparing the intensity patterns from single and multiple scattering, we looked for additional effects caused by multiple scattering. Several new secondary structures appear; however, their intensities are significant only when they result from spotlike primary structures. It appears that secondary structures from two combinations should be observable: from thick-plate crystals, the sun dogs of the sun dogs; and for long-column crystals in the Parry-arc orientation, the subsun of the lower tangent arc for Sun elevations around 15°. We show that multiple scattering is essential to explain the Saskatoon display.

© 1987 Optical Society of America

History
Original Manuscript: August 23, 1986
Manuscript Accepted: November 19, 1986
Published: March 1, 1987

Citation
E. Tränkle and Robert G. Greenler, "Multiple-scattering effects in halo phenomena," J. Opt. Soc. Am. A 4, 591-599 (1987)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-4-3-591


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References

  1. R. G. Greenler, Rainbows, Halos, and Glories (Cambridge U. Press, New York, 1980).
  2. F. Pattloch, E. Tränkle, “Monte Carlo simulation and analysis of halo phenomena,” J. Opt. Soc. Am. A 1, 520–526 (1984). [CrossRef]
  3. R. G. Greenler, E. Tränkle, “Anthelic arcs from airborne ice crystals,” Nature (London) 311, 339–343 (1984). [CrossRef]
  4. Y. Takano, S. Asano, “Fraunhofer diffraction by ice crystals suspended in the atmosphere,”J. Met. Soc. Jpn. 61, 289–300 (1983).
  5. W. Tape, Department of Mathematics, University of Alaska, Fairbanks, Alaska 99701 (personal communication, 1986).
  6. E. A. Ripley, B. Saugier, “Photometeors at Saskatoon on 3 December 1970,” Weather 26, 150–157 (1971). [CrossRef]
  7. W. F. J. Evans, R. A. R. Tricker, “Unusual arcs in the Saskatoon halo display,” Weather 27, 234–236 (1972). [CrossRef]

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