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El Niño, La Niña, and the Southern Oscillation

Online 23.1: Sea Surface Temperature Anomalies
January 1982 to December 1983:
One of the strongest El Niños on record developed during 1982 and continued into 1983. Equatorial sea surface temperatures were 5° C warmer than normal (red colors) during the peak of the event.

Courtesy of NOAA/Climate Diagnostics Center

Online 23.2: El Niño and La Niña in three-dimensions: A three-dimensional view of the equatorial Pacific Ocean shows how sea level varies through the El Niño/La Niña cycle. Color coding indicates the sea surface temperature anomaly (red, warmer than normal - El Niño; blue, colder than normal - La Niña).

NOAA/Pacific Marine Environmental Lab

Related Web Sites
ENSO Diagnostic Discussion Read about the current state of El Niño and La Niña.
El Niņo Theme Page Information about El Niño, along with impacts, monitoring and forecasting of both.
What is La Niña Read about what La Niña is, its impacts on global climate and the current state of the Pacific ocean.
WW2010 Guide to El Niño Learn more about El Niño, upwelling, recent events, and impacts of ENSO.
NOAA Climate Diagnostic Center Use historical data to map impacts of El Niño and La Niña.

Department of Atmospheric Sciences Severe and Hazardous Weather at Department of Atmospheric Sciences University of Illinois
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