Velocity and vorticity distributions in a region close to the midplane in run dg3c4_2048 after 300 orbits. Red and blue regions in the vorticity map correspond to clockwise and counterclockwise rotation, respectively. KH eddies on the lower hemisphere rotate clockwise, while their nonlinear evolution produces counterclockwise-rotating eddies that are amplified by the baroclinic torque, visible in that region as dark blue spots.