Ratio in arbitrary units of the z components of baroclinicity squared, b_z² = |(∇ρ×∇P)_z/ρ²|², and vorticity squared, ω_z² = |∇×v|_z², integrated in the z = 0 plane as a function of time in simulations with m = 2 and: (a) l/R = 0.5 and two different initial amplitudes, namely v₀/v_A, i = 0.05 and v₀/v_A, i = 0.15; (b) v₀/v_A, i = 0.1 and two different thicknesses of the nonuniform layer, namely l/R = 0 and l/R = 0.5.