>While the 2009/10 El Nino is still far from “Super El Nino” strength, NINO3.4 SST anomalies (OI.v2) for the week centered on December 23, 2009 have reached 1.94 deg C.
Weekly NINO3.4 SST Anomalies
The increase is also visible in a .gif animation of the global SST anomalies for the last 4 weeks.
Global SST Anomaly Animation
Referring to the NOAA Equatorial Pacific Temperature Depth Anomaly Animation webpage…
…more warm subsurface water may rise to the surface during this El Nino.
NOAA Equatorial Pacific Cross-Section – Temperature Anomaly Animation
Preliminary monthly NINO3.4 SST anomalies for December 2009 show an increase of 0.14 deg C to 1.81 deg C.
Preliminary December 2009 NINO3.4 SST Anomalies
And the preliminary global SST anomalies for December 2009 are showing an increase of 0.03 deg C to 0.29 deg C.
Preliminary December 2009 Global SST Anomalies
The preliminary monthly SST Anomalies are presented by the NOAA NOMADS webpage, but they will be updated over the next few weeks and will be finalized on January 11, 2010, according to the OI.v2 FAQ webpage:
And for those wondering about the hotspot in the mid-to-high latitudes of central South Pacific, it is an area that is correlated with NINO3.4 SST anomalies. Refer to the following maps of time sequence of temperature anomaly correlations from Trenberth et al (2002) “Evolution of El Nino–Southern Oscillation and global atmospheric surface temperatures”:http://www.cgd.ucar.edu/cas/papers/2000JD000298.pdf
Trenberth et al (2002) Figure 8
OI.v2 SST data is available through the NOAA NOMADS webpage: