Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974a%26a....35..209v&link_type=abstract
Astronomy and Astrophysics, vol. 35, no. 2, Oct. 1974, p. 209-214.
Astronomy and Astrophysics
Astrophysics
14
Albedo, Atmospheric Scattering, Cloud Cover, Diffuse Radiation, Light Scattering, Planetary Atmospheres, Homogeneity, Optical Thickness, Reflectance, Scattering Functions
Scientific paper
The similarity rules valid for reflection against planetary cloud layers make it possible to transform the set of parameters a (albedo for single scattering), g (asymmetry factor for single scattering), and b (optical thickness) in such a manner that the numerical results remain about the same. Three forms of such rules, which coincide for nearly-conservative scattering, are explained and a preference is expressed for one of them, in which the parameter s is kept invariant. The numerical test on the spherical albedo A* of a homogeneous semiinfinite atmosphere with Henyey-Greenstein scattering confirms that A* may be expressed as a simple function of s alone, with deviations reaching at most 0.002 for any set of parameters (a, g). Such a close similarity cannot be found for the plane albedo.
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