1 El Niño

2 Length Non-El Niño - 5 to 10 years El Niño - 1 to 3 years Equatorial Pacific in El Niño 20% of the time!

3 Satellite Technology TOPEX/Poseidon Jason

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5 1997-98 Event

6 Changes Warmer water Atmospheric pressure Prevailing winds

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9 Walker Cells 1998 Event

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14 La Niña Basically the opposite of El Niño Cooler water in Pacific Opposite weather events

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18 Effects

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23 Hurricane Season AtlanticEastern Pacific Avg.El Niño Avg. Avg.El Niño Avg. Named storms9.47.116,717.6 Hurricanes5.84.09.810.0 Intense Hurricanes 2.51.54.85.5

24 Causes Much debate on causes No clear understanding