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Surface temperature of the Pacific Ocean during the El Niño of 1997-98
Surface temperature of the Pacific Ocean during the La Niña of 1998-99
Surface temperature of the Pacific Ocean during the El Niņo of 1997-98 (top). Look for warmer temperatures (red) off the western coast of South America. Surface temperature of the Pacific Ocean during the La Niņa of 1998-99 (bottom). Look for cooler temperatures (blue) in the central Pacific. Courtesy of Cathy Smith, NOAA-CIRES, University of Colorado at Boulder