Figure 18From: Towards scaling laws for subduction initiation on terrestrial planets: constraints from two-dimensional steady-state convection simulationsSurface velocities over time for R a=3×107, θ=16, a=0.75, (a) T 0=0.8, τ y =6.6×105, (b) T 0=0.4, τ y =6.1×105, bottom velocity ≈650. The surface velocity in (b) increases slowly. Although it has evolved for approximately 25 times as much as the period for (a) to fail, it is far from reaching the bottom velocity.Back to article page