Thanks. The definition of El Niño is a tricky thing. In the end, it is guided by practical reasons. In Peru, we (ENFEN) opted to define the "coastal El Niño" in terms of the Niño 1+2 SST anomaly because this is closely linked to the impacts (e.g. coastal rain, fisheries, etc.) and is also part of the large-scale ocean-atmosphere dynamics that provides the predictability. But Peru (presumably also Ecuador) is also impacted by the "central Pacific El Niño" (Niño 3.4 warming), which reduces precipitation in our Andes and Amazon. So, we need to work with the two El Niños at the same time! (Needless to say, this has been a challenge to communicate.)