Radius at which the models switch to the local closure relations for the outer regions. Case A is shown in purple. For better visibility, case B (turquoise) and case C (orange) are shifted by –0.001 and –0.0024, respectively (see Table 2). The black lines show ∇_ad of the different models, shifted by the same amount as the model ∇. The dotted vertical lines mark the last grid point at which the fully non-local 3KM was applied.