Mid-April 2011 SST Anomaly Update


NINO3.4 SST anomalies for the week centered on April 20, 2011 show that central equatorial Pacific SST anomalies are approaching ENSO-neutral temperatures. They’re at approximately -0.57 deg C.

NINO3.4 SST Anomalies – Short-Term


Weekly Global SST anomalies are continuing their rise from their La Niña-related seasonal low. They are presently at +0.13 deg C.

Global SST Anomalies – Short-Term


This weekly Reynolds OI.v2 SST dataset begins in 1990. I’ve started the graphs in 2004 to make the variations visible.


OI.v2 SST anomaly data is available through the NOAA NOMADS system:


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.
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6 Responses to Mid-April 2011 SST Anomaly Update

  1. Pingback: Sea Surface Temperature… | pindanpost

  2. HR says:

    Hello Bob,

    There’s something curious about the most recent Australian BOM ENSO wrap-up.


    Like you they are reportinging a fading of La Nina conditions in the ocean data but are also showing atmospheric data that is consistent with strong La Nina conditions (SOI and clouds). I was wondering if you or any of your readers had any ideas why that is the case?


  3. Bob Tisdale says:

    HR: The SOI is measured as the Sea Level Pressure difference between Darwin Australia and Tahiti, both of which are not located near the equator. Darwin is at 12S and Tahiti is at 17S. The SOI does not necessarily correlate that well with NINO3.4 SST anomalies.

  4. Ric Werme says:

    Your NINO3.4 SST anomaly graph is a little bit different than the BoM one WUWT links to at http://www.bom.gov.au/climate/enso/monitoring/nino3_4.png . My guess is that you’re plotting the raw temp from once a week, and they’re doing the same thing, but with a different day of the week as the limit. The smoothing looks about the same to me.

    The two are close enough for most purposes, so I’m just curious.

  5. Bob Tisdale says:

    Ric Werme: It looks like the BOM uses different base years, and I’m not sure about the other differences.


  6. Pingback: >LINKS TO SST ANOMALY UPDATES | Bob Tisdale – Climate Observations

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