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

doi:10.1016/j.jqsrt.2016.12.024

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

Division of Earth Environment Dynamics

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	132-140
Number of pages	9
Journal	Journal of Quantitative Spectroscopy and Radiative Transfer
Volume	195
DOIs	https://doi.org/10.1016/j.jqsrt.2016.12.024
Publication status	Published - Jul 1 2017

All Science Journal Classification (ASJC) codes

Radiation
Atomic and Molecular Physics, and Optics
Spectroscopy

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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 journal › Article › peer-review

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AU - Förstner, Jens

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