Environmental differences in velocities, H I gas surface density and velocity dispersion in M 83. Mask: colors represent the different regions: central disk, ring, southern area, northern arm and the southern arm. We note the total sightlines for each of the regions. The grey colors in the background show the H I column density contours (N_HI = 13 × 10¹⁹ cm⁻²) that we showed in Fig. 1. Violin plots: each violin represents the distribution of each quantity in a region defined in the mask. We set the kernel density estimation (KDE) to compute an empirical distribution of each quantity to 200 points. The columns on the x axis show the H I gas surface density Σ_HI, the second the line width σ_eff, the observed velocities V_los, and the last residual velocities V_res. The mean value of the observed quantity is reported for each violin. The long tails seen for example in the V_los violin for the northern arm represents that there is one discrepant value.