Two Orchestras, One Score: How El Niño Splits the Midlatitude Climate
Two orchestras play from the same score, but in different keys. The score is the warm El Niño current, which every few years heats the tropical Pacific. The key is the regime in which the midlatitude atmosphere responds to that heating. One orchestra plays steadily and predictably; the other keeps stumbling, yet its playing carries deep bass notes that the first lacks.