Influence of tropospheric aerosol on integral albedo of cloudy atmosphere. Underlying surface system

Physics

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Aerosols, Atmospheric Physics, Clouds (Meteorology), Earth Albedo, Earth Atmosphere, Troposphere, Mathematical Models, Optical Properties, Planetary Radiation

Scientific paper

The integral albedo which is formed for the most part due to the albedo of clouds and the underlying surface, but aerosol outside the cloud can exert an influence is discussed. The four layer system was examined. Stimulated parameters for the individual layers and stipulated albedo of the underlying surface are used in computing the spectral albedo of the cloud layer of subsystem and transmission. The albedo for the system (a formula for Asys is derived) are determined. The method reduces the problem of determining the albedo of the four layer system to three independent problems, A sub 0, A sub I, A sub II, each of which is solved in the delta-Eddington two-flux approximation on the assumption of homogeneity of the individual layers. The effect of aerosol outside the cloud is indicated. In small absorption aerosol scattering in the layers outside the clouds increases the albedo of the system as a whole. The formula for Asys and other results evaluate the aerosol effect information of the integral albedo of the system.

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