<human>:  I have a question about the el nino and el ni<unk>o phenomena. When is the next el nino?
<bot>: The next el nino is expected to occur in 2022. The El Niño Southern Oscillation (ENSO) is a periodic climate pattern that occurs in the tropical Pacific Ocean. It is characterized by a warming of the surface waters of the eastern Pacific Ocean, which causes changes in the winds and weather patterns in the region.