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Every two to seven years, an unusually warm pool of water — known as El Nino, affects the local aquatic environment, but also spurs extreme weather patterns around the world, from flooding in California to droughts in Australia. This winter, the 2015-16 El Nino event will be better observed from space than any previous El Nino.
http://www.sciencedaily.com/releases/2015/10/151019182823.htm