El Nino: What’s It All About?

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Presentation transcript:

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 the shift in temperatures dramatically affects global weather

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

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

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

More El Nino Images Spring El Nino Normal Autumn El Nino

National El Nino Impact

Measuring El Nino Weather Station: Colorado

Measuring El Nino Buoys

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

Measuring El Nino Satellites

Measuring El Nino Sea Surface Temperatures

Measuring El Nino: Coral Bleaching

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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