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Abstract
The properties of several atmospheric models, which have been proposed for the purpose of numerical computation of prognostic maps, are discussed, and a new version of the ≥2 1/2-dimensional model≤ is given. It is pointed out that the ≥barotropic≤ model is unable to explain adequately the growth of wave perturbations, and that the advective model gives too strong instability for short waves, whereas the two-layer model and the continuous 2 1/2-dimensional model seem to describe almost correctly the behaviour of waves in a baroclinic current.
