Analyses of the non-sectoral Rossby mode in the RZ with ℓ_RZ = 4, m = 3, n_RZ = 3. (a) Radial profiles of the RMS velocity in the horizontal (red) and radial (blue) directions. The profiles are normalized to have a maximum total RMS velocity of unity. (b) RMS of the radial component of various forces, defined in Eqs. (15)–(18). The pressure gradient force (solid blue), Coriolis force (dashed black), buoyancy force (dashed red), and viscous force (solid orange) are normalized so that the maximum of the pressure gradient force is unity. (c) Same as (b) but for the horizontal component of the forces. Colours of the shaded regions follow the same notation as in Fig. 2.