El Nino and La Nina
- Created by: emily_w
- Created on: 26-02-15 11:08
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- El Nino and La Nina
- Frequencies
- El Nino
- 2-5 years
- Usually around December--named for Jeus, the "little boy"
- Reaches its peak late autumn of the following year. Event ends in early spring
- La Nina
- Same as El Nino, 2-5 years
- Lasts for 9-12 months, but can sometimes last for 2 years
- El Nino
- Causes
- Normal year
- TRADE WINDS: Normally, these blow warm water to Indonesia.
- HUMBOLDT CURRENT: A cold ocean current which means the West coast of South America normally has cold water
- Cooler in the Western Pacific, warmer in the Eastern
- El Nino
- HUMBOLDT CURRENT: Weaker because equatorial westerly trade winds are weaker
- WATER TEMP: Due to weak Humboldt current, sea next to South America is warmer
- La Nina
- TRADE WINDS: Normal trade winds going towards Australia strengthen
- SEA TEMP: Colder than normal on the coast of South America
- Normal year
- Impacts
- El Nino
- Global
- The average water temperature across the region increases. The mass of warm water can contribute to climate change
- The Americas
- Flooding from Chile to California
- South American fisherman can catch fewer fish
- California gets mudslides
- Eastern Africa
- Often reduced rainfall, so the Nile has less water
- Indonesia and Australia
- Drought
- Global
- La Nina
- Indonesia and Australia
- Wetter than normal
- The Americas
- Drier conditions in California
- Southwestern USA has warmer winters. Northwest has colder
- General
- El Nino conditions, but reversed
- Indonesia and Australia
- El Nino
- Frequencies
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