NINO3.4 Sea Surface Temperature (SST) anomalies (a commonly used El Niño-Southern Oscillation Index) are varying near the threshold of a moderate La Niña. They’ve been bouncing back and forth across -1.0 for a few weeks. For the week centered on December 14, 2011, NINO3.4 SST anomalies are approximately -0.90 deg C.
NINO3.4 SST Anomalies – Short-Term
Weekly Global SST anomalies dropped significantly a couple of weeks ago, but they rebounded over the past two weeks. That last drop might be where weekly Global SST anomalies bottom out during this El Niño-Southern Oscillation (ENSO) season. We’ll be able to tell over the next few weeks.
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: