Warm Pacific = Extreme El Niños

Warming Pacific Means Extreme El Niños Could Hit Twice As Often

The most intense El Niño events may soon hit every 10 years, instead of every 20 years, thanks to warming water in the eastern Pacific Ocean, a new study predicts.

An El Niño is the warm phase of a long-standing natural climate cycle in the Pacific Ocean. When changing wind patterns start piling up warm water in the eastern part of the equatorial Pacific, the redistribution of hotter water triggers changes in atmospheric circulation that influences rainfall and storm patterns around the world — an El Niño.

During extreme El Niños, sea surface temperatures warmer than 82 degrees Fahrenheit (28 degrees Celsius) develop in the normally cold and dry eastern equatorial Pacific Ocean.

http://www.weather.com/science/environment/news/extreme-el-ninos-could-hit-twice-often-20140120