Light scattering by ice crystals of cirrus clouds: From exact numerical methods to physical-optics approximation

Alexander Konoshonkin, Anatoli Borovoi, Natalia Kustova, Hajime Okamoto, Hiroshi Ishimoto, Yevgen Grynko, Jens Förstner

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The problem of light scattering by ice crystals of cirrus clouds is considered in the case of a hexagonal ice plate with different distributions over crystal orientations. The physical-optics approximation based on (E, M)-diffraction theory is compared with two exact numerical methods: the finite difference time domain (FDTD) and the discontinuous Galerkin time domain (DGTD) in order to estimate its accuracy and limits of applicability. It is shown that the accuracy of the physical-optics approximation is estimated as 95% for the averaged backscattering Mueller matrix for particles with size parameter more than 120. Furthermore, the simple expression that allows one to estimate the minimal number of particle orientations required for appropriate spatial averaging has been derived.

Original languageEnglish
Pages (from-to)132-140
Number of pages9
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume195
DOIs
Publication statusPublished - Jul 1 2017

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cirrus clouds
Physical optics
physical optics
Ice
Light scattering
Numerical methods
ice
light scattering
Crystals
Backscattering
estimates
approximation
Crystal orientation
crystals
backscattering
Diffraction
matrices
diffraction

All Science Journal Classification (ASJC) codes

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

Cite this

Light scattering by ice crystals of cirrus clouds : From exact numerical methods to physical-optics approximation. / Konoshonkin, Alexander; Borovoi, Anatoli; Kustova, Natalia; Okamoto, Hajime; Ishimoto, Hiroshi; Grynko, Yevgen; Förstner, Jens.

In: Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 195, 01.07.2017, p. 132-140.

Research output: Contribution to journalArticle

Konoshonkin, Alexander ; Borovoi, Anatoli ; Kustova, Natalia ; Okamoto, Hajime ; Ishimoto, Hiroshi ; Grynko, Yevgen ; Förstner, Jens. / Light scattering by ice crystals of cirrus clouds : From exact numerical methods to physical-optics approximation. In: Journal of Quantitative Spectroscopy and Radiative Transfer. 2017 ; Vol. 195. pp. 132-140.
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