El Niño & La Niña (El Niño-Southern Oscillation) - NOAA Climate.gov
Apr 10, 2025 · El Niño and La Niña are the warm and cool phases of a natural climate pattern across the tropical Pacific known as the El Niño-Southern Oscillation, or “ENSO” for short.
El Niño–Southern Oscillation - Wikipedia
El Niño–Southern Oscillation (ENSO) is a global climate phenomenon that emerges from variation in winds and sea surface temperatures over the tropical Pacific Ocean. Those variations have an …
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What is ENSO? - National Weather Service
The El Niño-Southern Oscillation (ENSO) is a recurring climate pattern involving changes in the temperature of waters in the central and eastern tropical Pacific Ocean.
Climate Prediction Center: ENSO Diagnostic Discussion
Dec 11, 2025 · ENSO Alert System Status: La Niña Advisory Synopsis: La Niña is favored to continue for the next month or two, with a transition to ENSO-neutral most likely in January-March 2026 (68% …
IRI – International Research Institute for Climate and Society ...
The CCSR/IRI ENSO plume forecast places the probability of La Niña at 56% for Dec-Feb 2026. From Jan–Mar 2026 onward, conditions the forecasts begin shifting toward ENSO-neutral, which is …
El Niño / Southern Oscillation (ENSO) | National Centers for ...
El Niño and the Southern Oscillation, also known as ENSO is a periodic fluctuation (i.e., every 2–7 years) in sea surface temperature (El Niño) and the air pressure of the overlying atmosphere …
El Niño Southern Oscillation (ENSO)
Nov 9, 2023 · El Niño Southern Oscillation (ENSO) is a naturally occurring large-scale climatic phenomenon involving fluctuating ocean temperatures in the central and eastern equatorial Pacific, …
Nino SST Indices (Nino 1+2, 3, 3.4, 4; ONI and TNI)
Dec 11, 2025 · Niño 3 (5N-5S, 150W-90W): This region was once the primary focus for monitoring and predicting El Niño, but researchers later learned that the key region for coupled ocean-atmosphere …
ENSO Information: NOAA Physical Sciences Laboratory
El Niño and La Niña, together called the El Niño Southern Oscillation (ENSO), are episodic departures from expected sea surface temperatures (SSTs) in the equatorial Pacific Ocean.