claim: So it’s been a surprise to climate scientists that 2017 has been so remarkably warm — because the last El Niño ended a year ago.
evidence: La Niña (/lɑːˈniːnjə/, Spanish pronunciation: [la ˈniɲa]) is a coupled ocean-atmosphere phenomenon that is the colder counterpart of El Niño, as part of the broader El Niño–Southern Oscillation climate pattern.