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Kelvin Wave 
The birth of El Niño. This animation shows anomalies, or departures from normal, in Sea Surface Temperature (SST) over the past year. As spring became summer in 1997, a Kelvin Wave of warm water crossed the Pacific and accumulated off the coast of South America, shown here in red. Click on your browser's reload button to see the animation again. (back) Animation: NOAA Anatomy of El Niño | Chasing El Niño | El Niño's Reach Dispatches | Resources | Mail | Site Map | El Niño Home Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated November 2000 |