Estimates of net radiation for evaporation calculations / Evaluations de différence du rayonnement pour les calculs d'évaporation

Abstract

Net radiation at the surface of the Earth, when estimated from relationships employed in the equation of Penman, is found to be greater than the values of net radiation that are measured. Since the net short-wave (solar) radiation is well estimated when derived from Penman relationships, the problem is identified as an overestimate of the net long-wave radiation and primarily as an underestimate of the outgoing long-wave radiation from the surface of the Earth. Evaluations