Fig. 7From: An introductory review of the thermal structure of subduction zones: II—numerical approach and validationConvergence characteristics for Nu (frame a) and \({V}_\text {rms}\) (frame b) for the thermal convection benchmarks 1a–1c and 2a. Dashed lines with triangular symbols denote Sepran results. TerraFERMA results are shown by the solid lines with circles. The difference between the original Blankenbach “best” estimates and our new extrapolated results is shown by the diamonds at an arbitrary point on the x-axisBack to article page