Evolution of the differential rotation δΩ, the meridional circulation ψ for η = 0.15, , E = 10^-7, λ = 10^-4, and B = 0,10⁴,10⁵,10⁷ (downwards). In the first column, difference in differential rotation is shown with contours: solid contours are faster than the core and dashed contours are slower than the core. When the spin-up flow dominates the differential rotation we obtain a fast equator while baroclinicity induces a fast pole. In the second column, meridional circulation is described with dotted lines for clockwise circulation (solid lines for counter-clockwise circulation). Boundary conditions are no-slip on both sides r = η and r = 1.