» El Niño/La Niña Forecasts From the Jet Propulsion Laboratory's TOPEX/Poseidon and Jason missions. http://topex-www.jpl.nasa.gov/science/el-nino.html
» El Niño: Research, Forecasts and Observations NOAA and El Nino: NOAA's role in studying, predicting and mitigating the El Nino Southern Oscillation (ENSO) phenomenon. http://www.elnino.noaa.gov/