Physics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rsenv..11..337f&link_type=abstract
Remote Sensing of Environment, vol. 11, Nov. 1981, p. 337-347.
Physics
3
Earth Albedo, Earth Surface, Near Ultraviolet Radiation, Satellite-Borne Instruments, Solar Radiation, Backscattering, Cloud Cover, Radiative Transfer, Solar Terrestrial Interactions
Scientific paper
Satellite-borne measurements of solar radiation backscattered by the earth and atmosphere allow a determination of the surface albedo in the near ultraviolet. The data yielded albedos at tropical latitudes during a 15-month period in 1979-1980. The wavelengths studied are 331.2 and 339.8 nm. Sixty-nine percent of the measurements imply albedos less than 0.3. Higher values include a contribution due to reflection from clouds and are consistent with previous estimates of the fractional cloudover in the tropics. An albedo histogram based on a bin width of 0.1 shows results in the range 0.1-0.2 to be the most frequent, appearing in 29% of the cases, although values which span the entire range 0.0-1.0 are present. The derived albedos show no correlation with solar zenith angle. This result is consistent with the fact that, at the wavelengths considered, the diffuse integrated intensity is larger than the attenuated direct solar beam near the ground.
Abrams R. B.
Frederick John E.
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