Fig. 1From: Subduction initiation from a stagnant lid and global overturn: new insights from numerical models with a free surfaceApplied yield stress profiles in regional models. Yield stress envelopes for the different experiments with either depth-constant (Δ σ y =0), depth-dependent (σ y,const=∞) or composite (σ y,const≠∞, Δ σ y ≠0) yield stresses. The transition between brittle (i.e. depth-dependent) and ductile (i.e. depth-constant) yielding is set to occur in the middle of the plate, at 50 km depthBack to article page