Abstract

The results of statistical simulation of intensity of transmitted solar radiation in the presence of optically thin cirrus clouds for two sensing geometries: in solar almucantar and hybrid scan (AERONET photometric network) are considered. Numerical experiments were performed using ice crystal cloud models: OPAC (hexagonal particles with a smooth surface) and a model proposed by Baum et al. (а mixture of particles with different shapes, hexagonal columns and aggregates of hexagonal columns with a very rough surface). The effects of shape and size of ice crystals on the angular distributions of downward radiation in the wavelength channels of 440 and 870 nm are estimated for background atmospheric situations observed in Tomsk in the summer period.

中文翻译：

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两种感知几何中晶体颗粒的形状和大小对透射太阳辐射角分布的影响：数值模拟的结果

摘要

考虑了在光学薄卷云的存在下对两种传感几何形状：太阳铝al和混合扫描（AERONET光度网络）的透射太阳辐射强度的统计模拟结果。使用冰晶云模型进行了数值实验：OPAC（具有光滑表面的六边形颗粒）和Baum等人提出的模型。（具有不同形状的颗粒，六边形柱和具有非常粗糙表面的六边形柱的聚集体的混合物）。对于夏季期间在托木斯克观察到的背景大气情况，估计了冰晶的形状和大小对440和870 nm波长通道中向下辐射的角度分布的影响。