Some Estimates of the Effects of Heating on Large Scale Disturbances

Effects of heating on large scale disturbances are studied by assuming that heating is tuned to the disturbances, with rate of heating proportional to individual pressure change but displaced by an arbitrary phase angle. The linearized two-layer baroclinic model reveals that the heating which accompanies condensation in the middle troposphere may lead to marked increase in instability and to shift of maximum instability from five to three thousand kilometer wavelengths, and this calls attention to a serious defect in the two-layer model which must influence the accuracy of numerical calculations using the non-linear equations.