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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 30, Iss. 24 — Aug. 20, 1991
  • pp: 3408–3414

Mie theory model of the corona

James A. Lock and Leiming Yang  »View Author Affiliations


Applied Optics, Vol. 30, Issue 24, pp. 3408-3414 (1991)
http://dx.doi.org/10.1364/AO.30.003408


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Abstract

We performed a calculation of the corona colors that employed Mie theory to obtain the scattered light intensity. The scattered intensity was integrated over the visible spectrum for a number of different cloud droplet size distriubtions. The results were converted to chromaticity coordinates, convolved with the angular size of the sun, and plotted on the 1931 CIE chromaticity diagram. The results were compared to observations of multiple-ring coronas. It was found that, when using Mie theory to estimate cloud droplet sizes, water droplets with diameters in the 7-μm ≲ D ≲ 15-μm range produced the 13 multiple-ring coronas that were observed.

© 1991 Optical Society of America

History
Original Manuscript: October 1, 1990
Published: August 20, 1991

Citation
James A. Lock and Leiming Yang, "Mie theory model of the corona," Appl. Opt. 30, 3408-3414 (1991)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-30-24-3408


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References

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  34. The data of Fig. 6, where different diameter droplets correspond to different red rings in a single corona, resulted from the corona occurring at the edge of the cloud where the droplet size distribution was not homogeneous.
  35. One additional corona photograph provided by K. Sassen was analyzed for which Fig. 6 predicts a droplet diameter of 21 μm. This corona, however, occurs in a cirrostratus cloud and possesses a number of the features particular to ice crystal coronas. see for example, K. Sassen, “Corona-producing cirrus cloud properties derived from polarization lidar and photographic analyses,” Appl. Opt. 30, 3421–3428 (1991). [CrossRef] [PubMed]
  36. Ref. 26, Table 3.6.

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