Seeing that Neap and Spring Tide fortnight Harmonics are significant factors, but lets be clear that its not Sea Tides so much as planetary-scale Atmospheric Tides that interact strongly with equatorial-wave QBO. There is also proportionally lessened influence of terrain on supposed tidal forcing and QBO, as a primarily Stratospheric event, while ENSO is deeply terrain-constrained.

There is also a probable QBO pumping factor of the daily (planetary rotation) heat wave in the Upper Stratosphere, with a vast breaking wave front that follows the dawn.

Once I am confident of the most basic facts, I'll be glad to weigh-in on Copernicus.