Comparison of ScaRaB, GOES 8, aircraft, and surface observations of the absorption of solar radiation by clouds

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Abstract
Data obtained by the Scanner for Radiation Budget (ScaRaB) instrument on the Meteor 3 satellite have been analyzed and compared to satellite (GOES 8), aircraft (Radiation Measurement System, RAMS), and surface (Baseline Solar Radiation Network (BRSN), Solar and Infrared Observations System (SIROS), and RAMS) measurements of irradiance obtained during the Atmospheric Radiation Measurements Enhanced Shortwave Experiment (ARESE). It is found that the ScaRaB data covering the period from March 1994 to February 1995 (the instrument's operational lifetime) indicate excess absorption of solar radiation by the cloudy atmosphere in agreement with previous aircraft, surface, and GOES 8 results. The full ScaRaB data set combined with BSRN and SIROS surface observations gives an average all‐sky absorptance of 0.28. The GOES 8 data set combined with RAMS surface observations gives an average all‐sky absorptance of 0.26. The aircraft data set (RAMS) gives a mean all‐sky absorptance of 0.24 (for the column between 0.5 and 13 km).

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