This post will serve as the Mid-August 2011 SST Anomaly Update
NINO3.4
NINO3.4 SST anomalies (a commonly used El Niño-Southern Oscillation Index) have dropped significantly below the -0.5 deg C threshold of a La Niña Event. They are presently at approximately -0.74 deg C.
NINO3.4 SST Anomalies
GLOBAL
Weekly Global SST anomalies rose since the last mid-month update, but made a minor dip last week. Global SST anomalies usually lag NINO3.4 SST anomalies by a few months so the global SST anomalies should be nearing their seasonal peak for this year, before they start to respond to the depressed NINO3.4 SST anomalies. For the week centered on August 17, 2011, Global SST anomalies are +0.169 deg C. I’ve also included a shorter-term graph so that the most recent wiggles are visible.
Global SST Anomalies
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Global SST Anomalies – Short Term
SOURCE
Reynolds OI.v2 SST anomaly data is available through the NOAA NOMADS system:
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