Reflecting light back in the direction of the source.
Process by which up to 25% of radiant energy from the sun is reflected or scattered away from the surface by clouds. Serves the greatest importance in the Atmospheric Heat Budget. Large errors in the assumed value of this variable may have important effects on computer models of the atmosphere.
the scattering into directions generally reverse to the incident beam
<radiobiology> Deflection of incident particle / radiation through an angle greater than 90 degrees relative to the original direction of motion/propagation. ... (09 Oct 1997) ... 
Portion of solar radiation directed back into space as a result of particle scattering in the atmosphere.
Primary radiation deflected or secondary radiation emitted in the general direction of the incident radiation beam. 
Primary radiation deflected or secondary radiation emitted in the general direction of the incident radiation beam.