I need to study the PV dissipation in the second layer of a meridional Rossby mode in a zonal channel. To give me a new start, run exp1 but with horizontal friction and no bottom friction and find the right value of dissipation for the wave amplitude to reach an equilibrium. Once the dissipation level is found, perform a similar experiment but now with two layers instead of one. The use of horizonal friction, instead of bottom friction, will allow the first upper layer to also reach an equilibrium (and avoid the layer to be indefinitively accelerated).
Study the differences in the parcel trajectories (and other quantities such as mean PV contours) in the layers of the different experiments. Study the effect of resolution (in time and space), dissipation level and/or form (Laplacian versus biharmonic), and Rossby characteristics (long versus short Rossby mode).