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Vol. 33, issue 12, article # 6

Zhuravleva T. B. Simulation of solar radiation brightness fields in the presence of optically anisotropic crystal clouds: algorithm and test results. // Optika Atmosfery i Okeana. 2020. V. 33. No. 12. P. 937–943. DOI: 10.15372/AOO20201206 [in Russian].
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Abstract:

An original algorithm for statistical of the solar radiation transfer in the presence of crystal clouds, optically anisotropic with respect to the zenith angle of the incident radiation, is presented. Examples of preliminary calculated local optical characteristics of clouds consisting of horizontally oriented plates (without taking into account internal absorption) are given. The software developed was tested in two numerical experiments. In the first of them, the results of calculations of reflected radiation for an isotropic medium with the use the previously developed algorithm for clouds consisting of chaotically oriented particles and the algorithm presented in this work were compared. In the second experiment the angular dependence of the upward radiation intensity and the phase scattering function in crystal clouds consisting of horizontally oriented plates is compared. The results of numerical experiments indicate that when simulating radiation transfer using this algorithm, the properties of the optical anisotropy of the medium are adequately taken into account.

Keywords:

radiation transfer, Monte Carlo method, optical anisotropy, horizontally oriented plates

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