Vertical component of the magnetic field, B_z(x, z), along the slice indicated by the red line in Fig. 1. Only regions between log τ_c ∈ [1, −4] (approximate region of sensitivity of the spectral lines observed by Hinode/SP) are shown. The dashed black line shows the location of the z(τ_c = 1) level (i.e., Wilson depression). Results from the MHS inversion are shown in the top panel, whereas results from the MHS + ∇ ⋅ B =  0 inversion are displayed in the bottom panel.