Discussion of the source-term results of a simulation of the global January climate by means of the two-level Mintz-Arakawa atmospheric general-circulation model. The source terms under consideration are the mean surface wind stress, the net diabatic heating rate, and the net rate of moisture addition. The model's latitudinal distributions of the zonal averages of these forcing fields accord reasonably well with available observations, but the model exaggerates convective precipitation in the tropics. That suggests the importance of accurately accumulating the convective precipitation rate during integration when determining monthly mean forcing fields. (See also R-877.)
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