Locally isothermal simulations with a non-migrating planet. Top: Unperturbed surface density profile (solid lines, left vertical axis) across the viscosity transition (dashed lines, right vertical axis). Bottom: Measurements of the normalized static torque at various orbital radii (points) scanning the viscosity transition. In both panels, α_DZ = 10⁻³ and different values of α_MRI are distinguished by colours and symbols (see the plot legend).