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Pacific ENSO Update

4th Quarter, 2009 Vol. 15 No. 4


SEA SURFACE TEMPERATURE (SST)

A weak El Niño continued during September 2009, as sea surface temperature (SST) anomalies remained nearly unchanged across much of the equatorial Pacific Ocean. Subsurface oceanic heat content (average temperatures in the upper 300m of the ocean) anomalies continued to reflect a deep layer of anomalous warmth between the ocean surface and the thermocline, particularly in the central and east-central Pacific. The pattern of tropical convection also remained consistent with El Niño, with enhanced convection over the west-central Pacific and suppressed convection over Indonesia. Low-level westerly wind anomalies continued to become better established over parts of the equatorial Pacific Ocean. These oceanic and atmospheric anomalies reflect an ongoing weak El Niño.



Average SST Anomalies

Graphics from NOAA's U.S. Climate Prediction Center




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Page Last Modified: June 01 2010 21:01:44 GMT

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