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Abstract
In their comments on my paper "A note on CISK in polar air masses", Huang and Kallen suggest using the structure function (3) to describe the diabatic heating. Close inspection reveals that there is no reasonable physical correspondence between this function and the vertical velocity field (2). The rsing branches are treated differently. Some are heated and some are not! It is not surprising that this peculiar choice does not satisfy the perturbation equation (I) . If the heating is modeled by using cos (kx) cos (ly) in the rising branches and 0 in the sinking branches, then the leading terms of the Fourier-expansion are 2/π2+0.5 cos(kx)cos(ly)+.... This corresponds well with the treatment in my paper.