El Niño and the Southern Oscillation (“ENSO”) A quick look

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Presentation transcript:

El Niño and the Southern Oscillation (“ENSO”) A quick look

“Normal” SST Walker circulation

ps(hPa)

Anomalous ps scaled by s.d.

Correlations (×10) of fluctuations in annual mean sea level pressure with those at Darwin. The magnitude of the correlation exceeds 0.4 in the shaded regions. (After Trenberth and Shea, 1987.)

“Normal” SST Walker circulation

“Normal” SST

Sea surface temperature anomalies (C) 0 – 10S, 80 – 90W

SST anomalies (Nino 1+2) vs SOI

Annual rainfall (in percentiles) in a selection of regions Annual rainfall (in percentiles) in a selection of regions. Black bars coincide with "El Niño" years.

cold warm

cold warm

Correlations (×10) of fluctuations in annual mean sea level pressure with those at Darwin. The magnitude of the correlation exceeds 0.4 in the shaded regions. (After Trenberth and Shea, 1987.)

El Nino impacts in U.S. winter

recent behavior in and over the equatorial Pacific

Current SST anomalies 2011 May 9

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