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El Nino: What’s It All About?

El Nino: What’s It All About?. ENSO: El Nino Southern Oscillation. January 31, 1998. What is El Nino?. warming of sea surface waters in the eastern Pacific Ocean caused by slowing of Pacific gyre “warm phase”, occurs every 3-7 years

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El Nino: What’s It All About?

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  1. El Nino:What’s It All About?

  2. ENSO: El Nino Southern Oscillation January 31, 1998

  3. What is El Nino? • warming of sea surface waters in the eastern Pacific Ocean caused by slowing of Pacific gyre • “warm phase”, occurs every 3-7 years • the shift in temperatures dramatically affects global weather

  4. Occurs during Christmas season ... • First noticed by Peruvian Fishermen • “Christ Child” • “The Boy” • “The Little One”

  5. Common Effects of El Nino? • US southwest wetter • US northwest mild winters • Atlantic hurricanes milder and less frequent • African droughts or floods • European droughts and floods • East asian floods Vietnam Has Been Hit by Flood and Drought in 2002. U.S. had worst fire year in last 50; this photo from Angeles National Forest

  6. What is La Nina? • cooling of sea surface waters in the eastern Pacific Ocean caused by speeding up of Pacific gyre • “cold phase”, occurs every 3-7 years

  7. More El Nino Images SpringEl Nino Normal Autumn El Nino

  8. National El Nino Impact

  9. Measuring El NinoWeather Station: Colorado

  10. Measuring El NinoBuoys

  11. The World’s Largest Scientific Instrument! Tropical Atmosphere Ocean (TAO) Array of ATLAS moored buoys

  12. Measuring El NinoSatellites

  13. Measuring El NinoSea Surface Temperatures

  14. Measuring El Nino:Coral Bleaching

  15. El Nino and California • Increased chance of heavy winter rains • Severe flooding and landslides (1934, La Canada floods kill more than 40 people; 1978 killer landslides in local mountains) • Bigger surf from larger Pacific Storms • Increased summer droughts A rescuer helps a woman out of her Orange County house, 1998

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