Feature article
ENSO Update
Current oceanic observations show El Niño/Southern Oscillation (ENSO) characteristics in the tropical Pacific region which are not coupled with the atmosphere
In July 2004, the tropical Pacific showed mixed warming and cooling signals, and Southern Oscillation Index (SOI) fluctuations occurred from April 2004. The equatorial sea surface temperature (SST) anomalies were below average near the South American coast but above average over the remainder of the equatorial tropical Pacific east of the Date Line. These were more than 1°C above average near the Date Line.