Vertical velocity dispersion σ_ɀ in the CMZ ring in the CHEM_MHD (top) and CHEM_HD (bottom) simulations at t = l86Myr. The velocity dispersion in the dense gas ring is much larger in the magnetised simulation than in the unmagnetised one due to the MRI-driven turbulence. Only regions with surface density Σ > 100 M_⊙pc⁻² are shown. The velocity dispersion is calculated using cubical bins 20 pc on-a-side as in Fig. 18.