ENSO events are in part characterized by warm temperature anomalies in the central to eastern equatorial Pacific. The Dec 2017 global sea surface temperature anomalies (SSTA) are given in the first figure.
ENSO index NINO3
SSTA are available from Nov 1981 to Dec 2017 here.
|Understanding ENSO||gives more information on the ENSO cycle|
|ENSO section of the IRI maproom||More data and data images useful for monitoring ENSO|