Vertical profiles of the relative contributions of shocks and CSs. Profiles are averaged horizontally in space and over 1 solar hour in time. At each height, we sum either Q_comp (left) or Q_mech = Q_ν + Q_η + Q_comp (right) over a selected subset of the domain (shocks, CSs, or the intersection of both) and compare it to the sum of the same quantity over the whole horizontal extent at that height. The vertical dashed line indicates the top of the CZ. Left: Relative contribution to the compression heating Q_comp, with shocks in dark grey and CSs in light grey. Right: Similar to the left panel in Fig. 7, but showing summed compression heating from the left panel (see Appendix D for an illustration of the stacking, along with absolute values). Contributions of the shocks, CSs, and non-steep gradients to the mechanical heating Q_mech are in purple, green, and white, respectively.