Couple of more blog posts on nailing down the mechanism for ENSO:
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**(1)** This one contextualizes the ENSO behavior in terms of a common forcing governing ENSO, QBO, and the Chandler wobble
http://contextearth.com/2017/05/21/the-lunar-geophysical-connection/
Here are a few charts from the post:



What are the odds that the fundamental frequencies of all these behaviors are the same to that precision?

As it turns out NASA JPL were on this lunar-forcing path several years ago, but elected not to fund the proposed research and so the progress stalled.
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**(2)** Yesterday's post provides a historical context. Essentially all the geophysics applicable to the model was known by 1920.
http://contextearth.com/2017/05/30/ocean-dynamics-history/
Could have done a decent job in predicting ENSO evolution with Pacific Ocean SST data up to 1920

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**(3)** Posted on the Azimuth blog.
https://johncarlosbaez.wordpress.com/2017/04/24/complexity-theory-and-evolution-in-economics/#comment-92343
ENSO means zero in Japanese and also has a Zen interpretation
> “The ensō symbolizes absolute enlightenment, strength, elegance, the universe, and mu (the void).”