The El Niño Southern Oscillation (ENSO) phenomenon contributes significantly to seasonal climate fluctuations in many regions of the globe, often with substantial implications for human populations and the environment.
This site provides details of the current forecast status of ENSO conditions, as well as background information on both the physical phenomenon and some of its associated impacts through examples provided by regional experts across a variety of sectors and disciplines. Lea sobre ENOS en espanol>>
The Big Picture: Why we are interested in the ENSO phenomenon.
The ENSO System: Basic and more technical background information on the ENSO phenomenon as it relates to conditions in the atmosphere and ocean.
ENSO and Climate: An overview of general effects of ENSO on seasonal climate as well as links to several graphical displays with more detailed information.
ENSO and Society: Provides a general overview of impacts, responses and regional and sector examples.
ENSO Quick Look: Overview of current ENSO conditions and forecasts for the coming 3 - 9 months, including technical discussions and summaries of model predictions. Issued monthly.
Current ENSO Conditions:The latest sea surface temperature anomalies in the equatorial Pacific Ocean.
IRI ENSO Map Room: View and download ENSO-related climate data such as sea-surface temperatures, wind anomalies and much more.