You say "La Niñas tend to rev up the existing Walker Circulation. The trade winds, which blow east to west across the Pacific Ocean, blow a little harder, while winds higher up in the atmosphere blow to the east a little bit harder. During November, that is exactly what happened." which indicates the winds are not strong enough to induce upwellings but are a consequence of an unknown driver. I propose this to be increased abyssal solid body Earth tides due to new physics.