Fig. 6: Evolution of velocities in the slab rollback subduction models.

Diagrams illustrating the temporal evolution of velocities for the two slab rollback subduction models. Please see figure legend of Fig. 5 for details, including explanations on panels a–c. Model rollback_tomo is represented by a continuous line while model rollback_stereo is represented with a dashed line. Note that the position of Vup_MW with respect to the trench changes during the experiment and that the distance between them progressively increases from ~600 km during the free sinking phase to ~2200 km in an advanced stage of the steady-state phase (Fig. 4c, d). Further note that the position of Vup_edge changes with respect to the trench from next to the sub-slab domain during the free sinking phase to next to the mantle wedge domain during the steady-state phase (cf. Fig. 4c, d).