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Table 3 Global model setups

From: Subduction initiation from a stagnant lid and global overturn: new insights from numerical models with a free surface

     Constant   
   Top   yield stress a Friction  
  Box boundary Resolution (σ y,const) coefficient Heating
Tag geometry condition (n x×n y×n z × n b) [MPa] (μ) mode
g l o b a l1 Cartesian Free-slip 2048×1×256 21.7 0.005 Purely internal
g l o b a l2 Cartesian Free 2048×1×256 21.7 0.005 Purely internal
g l o b a l3 Spherical Free-slip 128×384×64 × 2 190b 0.09 Internal & bottom c
g l o b a l4 Spherical Free 128×384×64 × 2 190b 0.09 Internal & bottom c
  1. aIn addition to a brittle, depth-dependent yield stress (see “Global model” section for more details)
  2. bGiven is the surface value that increases with depth according to σ y,ductile=σ y,const+Δ σ y ·d, where Δ σ y =0.025 and d is the non-dimensional depth ranging from 0 (top) to 1 (bottom)
  3. cUsing an isothermal bottom boundary with a non-dimensional temperature of T bot=1.0