Ukrainian Hydrometeorological Research Institute, Kyiv - Ukraine
The time-dependent one-dimensional numerical models of winter frontal clouds with detaliled microphysics and parameterized dynamics were constructed. In microphysical models it takes into account presence of different ice crystals forms.
For various types of model clouds were calculated:
• the scatterring characteristics using Mie theory and taking into account that the cloud consists of water droplets and nonspherical ice crystals;
• reflectance and transmittance of cloud layer (using discrete ordinate method for various viewing geometry, optical thickness and underlying surfaces) in visible and near-infrared part of spectrum;
• satellite signal for 1-3 channels of AVHRR (NOAA) and for 1 channel of Meteosat taking into account the normalized spectral response function. Obtained results demonstrate the significant effect of microphysics and optical parameters of cloud on simulated satellite signal in visible and infrared part of spectrum.
We conclude that retreieving of cloud parameters (liquid water content, thermodynamic phase, mode radius) on satellite image depend on the microphysical model which used as input information in the equations of radiation transfer.