Parameter Tree:
EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD RADIATIVE TRANSFER > CLOUD EMISSIVITY

Definition:
The (dimensionless) ratio of the radiant energy emittance of a
substance (clouds) to the ideal emittance of an ideal (blackbody) radiator
at that same temperature. 


Reference:
Glossary of Weather and Climate, American Meteorological Society, 1996.