>March 2009 Mid-Month ENSO Update

>During the week centered on Wednesday March 11, 2009, NINO3.4 SST anomalies have risen above the threshold for a La Nina to -0.41 deg C.
NINO3.4 SST Anomalies

On the other hand, NINO3 SST anomalies have dropped to -0.84 deg C.
NINO3 SST Anomalies

The cool water appears to be working its way westward toward the NINO3.4 region. Refer to the following map…
Central Pacific SST Anomalies (Week Centered on March 11, 2009)

And refer to the animation in the following link:

To add another perspective, the Southern Oscillation Index (SOI) for February 2009 shows no sign of weakening. Note that the SOI data has been inverted so that it corresponds to the variations in NINO SST anomalies.
Inverted Southern Oscillation Index


The map and the SST anomaly data used to create the graphs are available through the NOAA NOMADS system:

Southern Oscillation Index data available from the Australian Bureau of Meteorology webpage:

About Bob Tisdale

Research interest: the long-term aftereffects of El Niño and La Nina events on global sea surface temperature and ocean heat content. Author of the ebook Who Turned on the Heat? and regular contributor at WattsUpWithThat.
This entry was posted in El Nino-La Nina Processes, SST Update. Bookmark the permalink.

2 Responses to >March 2009 Mid-Month ENSO Update

  1. John says:

    >Nothing has done more to “GREEN” the planet over the last several decades than elevated levels of CO2 together with moderate sun driven warming. Studies show doubling CO2 levels increases plant growth rates 33 percent. It is no accident commercial greenhouse operators invest heavily in CO2 generators to increase the productivity of their operations. Farmers, ranchers and foresters, and in fact all living things, have benefited from this rare, but temporary, gift of nature. Why is our government spending so many resources to convince us otherwise?

  2. Bob Tisdale says:

    >John: What does your comment have to do with the subject of this post, ENSO? Please remain on topic. Future off-topic comments will be deleted.Regards.

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