Selected inertial modes computed in the extended setup, which includes the RZ. (a) Modes with motions predominantly in the CZ and decaying in the RZ. (b) Modes with comparable motions in the RZ and CZ, with flows in the CZ similar to those of the corresponding modes in panel a. (c) and (d): Surface and radial variations of the modes, respectively, as in Fig. 3. The spherical harmonic degree and the number of radial nodes of the RZ Rossby modes in the region 0.5 R_⊙ ≤ r ≤ 0.71 R_⊙ are denoted by ℓ_RZ and n_RZ, respectively. The m = 1 high-latitude modes are normalized to have a maximum surface velocity of 10 m s⁻¹, the m = 2 high-latitude modes to 4 m s⁻¹, and the other modes to 1 m s⁻¹. The notation and layout are the same as in Fig. 3.