Numerical study of influence of different dispersed components of crystal cloud on transmission of radiant energy

Highlights: • Influence of crystals on extinction and transmission of radiation is evaluated. • Oriented plates play the main role in features of transmission of optical radiation. • Effect of polarization on transmission of radiant energy for crystals is estimated. • Contributes of large and small crystals to transmission by medium are considered. - Abstract: The calculated results of the transmission of visible and infrared radiation by an atmosphere layer involving ensembles of large preferentially oriented crystals and spherical particles are presented. To calculate extinction characteristics, the physical optics method and the Mie theory are applied. Among all atmospheric particles, both the small particles that are commensurable with the wavelength of the incident radiation and the large plates and the columns are distinguished by the most pronounced dependence of the transmission on spectra of radiant energy. The work illustrates features of influence of parameters of the particle size distribution, particle aspect ratios, orientation and particle refractive index, also polarization state of the incident radiation on the transmission. The predominant effect of the plates on the wavelength dependence of the transmission is shown. A separated and cooperative contributes of the large plates and the small volume shape particles to the common transmission by medium are considered.