Evolution of enstrophy, kinetic stresses, and vertical velocities in a 3D baroclinic simulation. The evolution is very similar to the 2D case up to 120 orbits. At that time the vortex goes elliptically unstable, and the kinetic energy of vertical motions increases by 10 orders of magnitude in less than 10 orbits, but remains three orders of magnitude lower than the radial rms velocity. This 3D elliptical turbulence is very subsonic, and the vortex is not destroyed. The level of enstrophy and angular momentum transport remain similar to that of a 2D simulation.