Left: Stack plot of the relative contributions of shocks, CSs, and non-steep gradients (white), corresponding to the right panel of Fig. 9. The colour code of the different relative contributions to the mechanical heating (Q_mech = Q_comp + Q_ν + Q_η) is the same as for Figs. 7 and 9. Similarly, these contributions have been averaged in space horizontally and in time over 1 solar hour. Right: Absolute contribution of shocks (dotted magenta), CSs (dashed green), and the union of both (solid dark) to the mechanical heating.