>However, as our system approaches a phase transition, e.g. as a solid approaches its melting point, its 2-point functions decay more slowly, and right at the phase transition they often show power-law decay.
Wouldn't you need some more homogenous image for that? Unfortunately El Nino doesn't look very scale invariant.
>Okay, seasonally adjusted temperature seems a much clearer term for “actual temperature at some location and some day value minus the average over years of the temperature at that location on that day of the year.”
I think their description is better. Finally seasonally adjusted could e.g. also mean "actual temperature at some location and some day value minus the average over years of the temperature at that location on that season of the year.”
Did you read my comment
>The tricky question is: can you see it coming?
Is this black frame
for NINO3.4 index ? By the way are the red dots their sample points?
I find actually the region right in front of the coast of South America (middle right side of image) rather significant.