True and inverted flow velocity for SG2 from Table 1 with data and model misfits. The top left panel indicates true v_x, the top center indicates inverted v_x, and the top right indicates misfit in v_x as a function of depth (Eq. (18)). The middle left panel indicates true v_z, middle center indicates inverted v_z, middle right indicates misfit in v_z as a function of depth (Eq. (19)). The bottom left panel indicates data misfit from Eq. (7); the bottom center indicates model misfit from Eq. (20) for the stream function ψ and the two components of velocity.