Velocities in z-direction for disks with α = 0.001 and O:P(3:1) (top), α = 0.001 and O:P(equi) (2nd from top), α = 0.004 and O:P(equi) (3rd from top), and a fixed γ = 1.1 with constant viscosity (bottom). The black line indicates H(r) in the disk and the red line delineates τ = 1.0 (the optical depth integrated from the top of the grid toward the midplane of the disk). Please note the different color scales and that they only show a subset of the range of values to better highlight the internal structure.