File name: OceanicNinoIndex1950-2010.jpg
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Graph showing the Oceanic Niño Index (difference from average sea surface temperatures in a key region of the tropical Pacific Ocean) from 1980-2012. Cooling La Niña events (blue shading) in the past decade have outnumbered warming El Niño events (red shading). Data courtesy of the NOAA Climate Prediction Center.