Two peaks are visible and the kinematics does not exactly match the rotation pattern. One possibility is that there is an additional outflowing component, perhaps from photoevaporation. All agreed that it would be useful to make a figure that would allow direct comparison of the observations of all the observed lines, with comparable angular and velocity resolution. A small survey of disk systems suggests some trends, in particular with the objects whose spectral energy distributions suggest dust settling. Calculated abundances and ratios received a lot of skepticism because of the problems of optical depth effects.
More analysis is needed.