What years are ENSO years?

Because ENSO events differ in their strength, coverage, and seasonality, there isn't unanimous agreement on what constitutes and ENSO event. But, there are broad agreements and you can find some of the lists researchers have used along with how they chose those years. The list in the right column represents ENSO years based on PSL's Extended Multivariate ENSO Index (MEI.ext) and after that, the MEIV2.

You may also be interested in:

• Comparison of different ENSO indices to the current state and time-series plots of those indices.
• The Top 24 Strongest El Niño and La Niña Event Years by Season (using PSL MEI.ext)
• NOAA/CPC List of Cold and Warm Episodes by Season from 1950–Present (using ONI–ERSSTv4)

Animations of Selected Past Events