The Galápagos coral study is interesting data, but the leap to blaming human warming is a stretch the evidence doesn't fully support. The IPCC itself concluded there is no consensus from models on a systematic change in El Niño sea surface temperature variability, and large model ensembles found no historical trends distinguishable from internal variability. Natural volcanic and solar forcing can account for the observed uptick in ENSO amplitude just as plausibly as greenhouse gases.