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ENSO El Niño Southern Oscillation Pages 484-487. NORMAL conditions  Trade Winds  Cool water pools near S.America,  Warm water pools near Australia.

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Presentation on theme: "ENSO El Niño Southern Oscillation Pages 484-487. NORMAL conditions  Trade Winds  Cool water pools near S.America,  Warm water pools near Australia."— Presentation transcript:

1 ENSO El Niño Southern Oscillation Pages

2 NORMAL conditions  Trade Winds  Cool water pools near S.America,  Warm water pools near Australia

3 El Nino Warning System Sea Surface Temperature Wind Speed/Direction Ocean Current Direction

4 EL NINO

5

6 How are “El Niño” conditions different?  Ocean currents reverses  Warm water pools near S.America  Cool water pools near Australia

7

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9 How does El Nino affect weather in… South America? Australia? Northern US? Southern US? Typhoons?

10 Global Effects of El Nino  S. America- more rain; warmer  Floods/mudslides  Australia- dry; cooler  Less typhoons  Kills anchovies in Peru ( how El Nino was first discovered)

11 El Nino’s effect on the United States  Warmer winters/ drier in N states Wet/colder  Wet/colder winters in S states

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13 “LA NINA”  Cool phase of ENSO (neg. phase)  Trade winds intensify

14 La Nina

15 How does La Nina affect weather in… South America? Australia? Northern US? Southern US? Hurricanes?

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17 South America- drier/colder Australia- wetter/warmer N. US- Colder than normal winters »Increased snowfall More hurricanes S. US- warmer/drier La Nina’s effects

18 Predictable?

19 El Nino or La Nina?

20

21 winter forecast (as of Oct. 2012)

22 El Nino or La Nina?

23 Winter 2012 normal2012 Plus el Nino

24 Helpful Websites TAO ~ Tropical Atmosphere Ocean project The TAO Story /mainDOC.html


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