The convective eddy momentum tendency F, neglected in many global circulation models, looks broadly similar in 2 and 3 dimensional simulations. It has a large component in quadrature with the mean wind profile, tending to cause momentum profile features to descend. This component opposes, and exceeds in magnitude, the corresponding large-scale vertical advective tendency, which would tend to make features ascend in convecting regions. The portion of F in phase with the mean wind is isolated by vertically integrating F.u, yielding a kinetic energy tendency which is overwhelmingly negative.
Large scatter reflects the effects of varying convective organization.