The orbs are meant to represent the orbits around the global attractor as with a Lorenz butterfly. In A the global attractor is drifting warmer as seen by the excursions of the orbits into new territory. We can perhaps say something about the global attractor from what we see above the line. Thinking of what else might be happening, we have B. Maybe the orbital diameter is increasing while the attractor does not move. In C the attractor also does not move but changes its elliptical shape. C would explain steady low temperature records with increasing high temperature records.