El Niño bulletin

Latest plots

 

 

Latest monthly mean of Sea Level Anomalies over the Tropical Pacific (MSLA are computed from SSALTO/Duacs, annual and seasonal cycles removed,
see the product sheet). A map of the latest Sea Surface Temperature is also available. 
See also previous maps for MSLA and Sea Surface Temperature. Credits CNES/CLS.

Standardized Sea Level Anomalies over the Nino3.4 region (MSLA are computed from SSALTO/Duacs maps, see product sheet). See also non-standardized Sea Level Anomalies. A standardized Sea Surface Temperature is also available. Credits CNES/CLS.

 

The ENSO index is based on the altimeter sea level anomalies over the Nino3.4 region in the Pacific ocean. The annual, seasonal cycles and 60-day signal have been filtered out and the sea level trend has been removed. Monthly time series are computed and normalized.

So note that since April 2022, a new version taking into account the mean sea level trend has been implemented as described here

MSLA are computed from Ssalto/Duacs. More information on MSLA products is given on the product sheet.

See also non-standardized Sea Level Anomalies

Sea Surface Temperature

The ENSO index is also derived from the sea surface temperature over the Nino3.4 region in the Pacific ocean. The annual, seasonal cycles and 60-day signal have been filtered out and monthlynormalized time series are computed.

A map of the latest Sea Surface Temperature (annual and seasonal cycles removed ) is also available. Click here to display There were no change in the Sea Surface Temperature computation in January 2020.

*A plot of the time evolution of the Standardized Sea Surface Temperature over the Nino3.4 region (annual and seasonal cycles removed) is also here.

VISUALIZATION AND DOWNLOAD

FOR MORE INFORMATION

  • Applications: ENSO
  • Other observations
  • Forecasts :
    • ECMWF
    • CPC/NCEP Climate Prediction Center/National Center for Environmental Prediction
    • IRI International Research Institute for Climate Prediction