G163S10L15_enso_ROD

G163S10L15_enso_ROD - ElNio/SouthernOscillation...

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El Niño/Southern Oscillation Major climatic perturbation on the planet Coupled atmosphere ocean process  Key is the western tropical Pacific  Ascending branch of the Walker circulation  Potential energy for Kelvin wave pulse www.pmel.noaa.gov/tao/elnino/nino-home.html
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The Southern Oscillation  Discovered in 1928  by Sir Gilbert Walker Links  ’s in global  climate indices Proposes a zonal  circulation cell over  the equatorial Pacific
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The Southern Oscillation 
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The Southern Oscillation  Pressure  ’s regulate strength of the trades El Niño periods = weak trades
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Southern Oscillation Index SOI = Tahiti - Darwin air pressure  ’s Low SOI = El Niño conditions
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Southern Oscillation
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Nino Regions
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Multivariate ENSO Index meridional components of wind, sea surface  temperature, air temperature and total cloudiness. Positive MEI = ENSO conditions 
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Walker Circulation East-to-west pressure gradients drive trades
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Walker Circulation Vertical cell driven by warmest waters
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Western Pacific Warm  Pool
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Coupled Walker/Ocean  Circulation
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Coupled Walker/Ocean  Circulation
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El Niño Events Relaxation of  trades  causes warm  pool to slosh  across Pacific  basin
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El Niño Conditions
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This note was uploaded on 12/28/2011 for the course GEOG 163 taught by Professor Siegel,d during the Fall '08 term at UCSB.

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G163S10L15_enso_ROD - ElNio/SouthernOscillation...

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