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El Nino

El Nino. El Nino – Typical surface ocean circulation. El nino conditions. Normal El nino – strong counter-current. El nino conditions. Normal El nino – strong countercurrent. El Nino: Normal Conditions. Prentice Hall Textbook animation link. El Nino: El Nino Development.

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El Nino

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  1. El Nino

  2. El Nino – Typical surface ocean circulation

  3. El nino conditions • Normal • El nino – strong counter-current

  4. El nino conditions • Normal • El nino – strong countercurrent

  5. El Nino: Normal Conditions • Prentice Hall Textbook animation link

  6. El Nino: El Nino Development • Prentice Hall Textbook animation link

  7. El Nino: La Nina • Prentice Hall Textbook animation link

  8. Winter NH • El Nino • La Nina

  9. Summer NH • El Nino • La Nina

  10. El nino - precipitation

  11. El nino - precipitation

  12. Typical winter Effects • El Nino • La Nina http://www.cpc.noaa.gov/products/analysis_monitoring/ensocycle/nawinter.html

  13. El Nino – weak Aleutian High

  14. La Nina – strong Aleutian High

  15. El Nino: US Winter Temperatures • Higher in mid continent • Lower in south

  16. El Nino: US Winter Precipitation • Higher in south and coastal regions

  17. Flooding in San Francisco During the winter of 1997-98, wind-driven waves and abnormally high sea levels significantly contributed to hundreds of millions of dollars in flood and storm damage in the San Francisco Bay region. Recent analyses by U.S. Geological Survey (USGS) scientists of nearly 100 years of sea-level records collected near the Golden Gate Bridge found that these abnormally high sea levels were the direct result of that year's El Niño atmospheric phenomenon.

  18. Flooding in San Francisco • Less land sea winds with El nino conditions result in higher sea level. http://geopubs.wr.usgs.gov/fact-sheet/fs175-99/

  19. Hurricanes • El Niño contributes to more eastern Pacific hurricanes and fewer Atlantic hurricanes. • Average US damage = $5.9 billion • La Niña contributes to fewer eastern Pacific hurricanes and more Atlantic hurricanes. • Average US damage = $2.0 billion US hurricane damage

  20. US Tornados Tornado activity Depends on the location of the polar jet stream (and thus the location an movement of mid-latitude cyclones) • El Nino: More to the south • La Nina: more to the north

  21. AKprecip (in) • El Nino: • Nov- Dec

  22. AKTemperature • El Nino: • Feb - Apr

  23. Prediction of El Nino • Satellites • provide data on tropical rainfall, wind, and ocean temperature patterns, as well as changes in conditions for hurricane formation. • Ocean buoys • help to monitor sea-surface and upper ocean temperatures. • Radiosondes • balloon-borne instrument platforms with radio transmitting capabilities, help to monitor global weather and climate patterns • Super computers • gather all of the weather data around the world and put it into useful formats used by scientists. • Run models for future change

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