Position–velocity cuts at 0.04′′ ≃ 18 au resolution across the upper disk atmospheres in HH212: black contours and grayscale show SO ALMA observations from Lee et al. (2018a). Cyan contours show synthetic predictions for the MHD DW model of Tabone et al. (2017). z_cut is labeled in arcsec in the upper-left corner (>0 in the blue lobe, <0 in the red lobe). Magenta curves in panels a and b plot Keplerian curves fitted by Lee et al. to their data at z ≃ ± 20 au; the blue andred velocity shift of these curves from the systemic velocity suggests an outflow from the disk atmosphere out to r_out ≃ 0.1′′≃ 45 au, well reproduced by the MHD DW model; green ellipses in panels a and c show the expanding shell model fitted by Lee et al. in theblue lobe.