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 journalArticlepeer-review

22 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

All Science Journal Classification (ASJC) codes

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

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