Air dynamics near the soil surface and convective emission of aerosol |
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| Authors: | E B Gledzer I G Granberg O G Chkhetiani |
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| Institution: | 1.Obukhov Institute of Atmospheric Physics,Russian Academy of Sciences,Moscow,Russia;2.Space Research Institute,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | Asymptotics for the mass concentration of finely dispersed aerosol are obtained on the basis of in situ measurements in a
desert in the Caspian region and estimates of hydrodynamic parameters in the viscous thermal boundary layer near the soil
surface. In the problem under consideration, the dynamic velocity (friction speed) and the temperature drop in the thermal
boundary layer are external parameters. The model of a porous soil layer, in which the air dynamics is described with the
use of the Darcy equation, is considered a possible mechanism of aerosol export. The estimates of the critical parameters
at which sand particles thermally roll over in soil pores are obtained. |
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