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The End of an El Niño |
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An El Niño typically lasts 12 to 18 months. How did scientists know when the 1997-98 event was ending? They looked for clues in the eastern Pacific Ocean.
- High sea levels decreasing to normal heights
- Sea surface temperatures cooling
- Trade winds strengthening
- Deep, cold water moving east
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Normal conditions (top) and El Niño conditions (bottom). |
