Distribution of dimensionless local radial shear Ro_sh^l as given in Eq. (5) for the run with g ∼ 1/r², Ra = 5 × 10⁶, ξ = 0.35. Dotted line denotes the location of tangent cylinder. (a) Ro_sh = 0, without imposed differential rotation at the bottom of the convection zone. This case corresponds to naturally developing deviation from solid-body rotation with Ω_s, due to the turbulent and magnetic stresses of the convective dynamo. (b) Ro_sh = 0.0125, before collapse; (c) Ro_sh = 0.015, at the dipole collapse; (d) Ro_sh = 0.02, after the collapse.