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Sea Surface Temperatures
pacific sea surface temperature during an el nino
Pacific sea surface temperature during a la nina
Top: Normal sea surface temperatures. Middle: Sea surface tempuratures during an El Niņo. Notice the red areas to the west of South America. Bottom: Sea surface tempuratures during a La Niņa. Notice the blue areas to the west of South America. Courtesy of the United States Navy (USN) Fleet Numerical Meteorology and Oceanography Center (FNMOC)