期刊
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
卷 195, 期 -, 页码 132-140出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jqsrt.2016.12.024
关键词
Atmospheric scattering; Diffraction; Ice crystal phenomena; lidar
资金
- Russian Foundation for Basic Research [15-05-06100, 15-55-53081, 16-35-60089]
- Russian Science Foundation [14-27-00022]
- Collaboration Research Program of the Research Institute for Applied Mechanics, Kyushu University [10, 8]
- JSPS Kakenhi Grant [25247078]
- Grants-in-Aid for Scientific Research [17H06139, 25247078] Funding Source: KAKEN
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 Galerldn 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. (C) 2016 Elsevier Ltd. All rights reserved.
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