El Niño and La Niña: Tracing the Dance of Ocean and Atmosphere - National Academies popular article describes the basic scientific research that led to our current understanding of these weather phenomenon.
El Niño/La Niña Watch - Archive of images and news releases about observations of the El Nino/La Nina phenomenon in the Pacific Ocean by the U.S./French TOPEX/Poseidon, Jason-1, and other NASA/JPL satellites and instruments.
What is an El Niño? - Illustrated explanation with realtime graphics and animations of data from the tropical Pacific Ocean. From NOAA.
The Potential Use and Misuse of El Niño Information - A workshop report from the Environmental and Social Impacts Group. Includes compilation of documents including an executive summary and a glossary.
CPC - La Niña/El Niño Coverage - Regularly updated discussion and coverage of the La Niña/El Niño weather system including global and regional impacts and forecasting.
CPC El Niño/Southern Oscillation (ENSO) - Coverage of the weather system from the Climate Prediction Centre, including forecasts, historical info, and the impact of the system on weather patterns.
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