Couple more blog posts that demonstrate how well the ENSO model works in describing the observations and the geophysics ...
The first is evidence as to how such a simple model can produce such a rich Fourier spectra, contrary to people's preconceived notions:
The second is an untainted match between the lunar forcing used to model ENSO and the lunar forcing obtained from the earth's Length-of-day (LOD) data
Have to look at Fig.6 in the post to see the match closely.
This is untainted because the LOD is completely [out-of-band](https://en.wikipedia.org/wiki/Out-of-band) with the fitting data and so becomes a strong validation test for the model.