Abstract
Abstract An annual, zonally averaged, steady-state hemispherical climatic model is developed which incorporates the diffuse thin cloud tropospheric structure of Weare and Snell as a cloudiness feedback mechanism. The zones are 15° wide and the meridional energy transport is parameterized as that carried by the ocean and by tropospheric eddies, each using a single coefficient, and that carried by the mean annual circulation embodying four coefficients. The radiative transfer calculations through the atmosphere employ the Eddington approximation for the visible spectrum, using the appropriate annual averaged solar zenith angles and the Rodgers emissivity technique for the infrared. Ozone, above the troposphere, is assumed to act only as an absorber in the visible. In the infrared it is assumed to have a constant-hemispherical emissivity at the “tropopause” temperature (212 K). Surface reflectivities in terms of land and ocean are zonally set and land snow and ocean ice lines are calculated to occur at 273 a...
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