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The first signs of El Nino are 1. Rise in surface pressure over the Indian ocean, Indonisia and Australia 2. Fall in air pressure over Tahiti and the rest of the central and eastern Pacific Ocean 3. Trade winds in the Pacific weaken or head east 4. Warm air rises near Peru causing rain in the northern Peruvian deserts 5. Warm air spreads from west Pacific and Indian Ocean to east Pacific. It takes rain with it causing extensive drought in the western Pacific and rainfall in the normally dry eastern Pacific

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16y ago

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