Left: poloidal (φ = 0) cuts of the HI-ext run after convergence at t = 200 Ma. From top to bottom: log (n) with (poloidal) velocity arrows overplotted, log (||B||) with field lines overplotted, and white crosses marking the field line seed points, log (Z²), λ, and σ_c. Right: the same quantities for the N4631 run. Note the different scalings used on both sides for all quantities except σ_c.