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The heat stored in the ocean influences the atmosphere above, impacting weather and climate around the globe. Long-term satellite observation of the ocean's surface temperatures enables scientists to understand large-scale climate patterns. One such pattern is the El Niño/Southern Oscillation, or ENSO, cycle, marked by the changing temperature of surface waters in the equatorial Pacific Ocean. In 2010, one phase of the ENSO cycle—El Niño—shifted dramatically to La Niña, its opposite phase. You can watch the shift and the wild weather that resulted in this visualization of sea surface temperature data.