Influence of the shape and size of crystal particles on the angular distribution of transmitted solar radiation in two geometric sounding schemes: results of numerical simulation
T.B. Zhuravleva
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: метод Монте-Карло, модели кристаллической облачности, угловые распределения нисходящего солнечного излучения, AERONET, Monte Carlo method, models of crystal clouds, angular distribution of downward solar radiation, AERONET
Abstract
The results of statistical simulation of transmitted solar radiation intensity in the presence of optically thin cirrus clouds for two geometrical sensing schemes - solar almucanthrate and hybrid scanning (AERONET photometric network) are considered. Numerical experiments were performed using crystal cloud models: OPAC (hexagonal particles with a smooth surface) and a model proposed by Baum B.A., Yang P., Heymsfield A.J. et al. (а mixture of particles of different shapes, hexagonal columns and aggregates of hexagonal columns with a very rough surface). Estimates of the influence of the shape and size of ice crystals on the angular distribution of downward radiation in the 440 and 870 nm spectral channels for background atmospheric situations observed in Tomsk in the summer period are presented.
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