Schematic depiction of the Stokes theorem contour, overlaid on a snapshot of the ASH simulation. The dark contour C_H shows the path of integration around the area A_H in the northern hemisphere, which is broken into four segments; surface, equator, base, and axis of rotation. The left hemisphere shows the structure in the radial field at the outer boundary of the simulation. The right hemisphere shows a slice through the azimuthally averaged toroidal magnetic field in the simulation.