Harvest moon time
This small-scale QBO experiment is very interesting
The geometry of the setup doesn't match the real QBO at all, yet the results appear to agree with the solution to the primitive equations for a rotating cylinder with a periodic latitudinal forcing. Watch the membrane -- as it pulsates up-and-down the transverse oscillations keep pace. When the membrane amplitude gets bigger gradually the velocity covers a longer swing. That's because the inertial volume can keep up with it.
Also have a new blog post at http://contextearth.com/2016/09/17/enso-model-final-stretch-maybe/