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Oct 19, 2023 · Learn about El Niño, a climate pattern that causes unusual warming of surface waters in the eastern Pacific Ocean. Find out how El Niño affects weather, fisheries, and ecosystems around the world.
Feb 2, 2016 · Learn what El Niño is, how it affects weather and climate worldwide, and how NOAA forecasts and monitors this natural phenomenon. Find out the impacts, history, and science of El Niño and its opposite, La Niña.
Jul 17, 2024 · Learn about the El Niño-Southern Oscillation (ENSO), a recurring climate pattern across the tropical Pacific that affects weather and climate around the world. Find out the latest official ENSO update, the typical U.S. and global impacts, and the ENSO alert system.
Apr 16, 2024 · El Niño and La Niña are opposite phases of a natural climate cycle that alter global temperatures, rainfall, storms and CO2 levels. Learn how they work, when they happen and why they matter for the planet and people.
Jun 29, 2024 · El Niño, in oceanography and climatology, the anomalous appearance, every few years, of unusually warm ocean conditions along the tropical west coast of South America. This event is associated with adverse effects on fishing, agriculture, and local weather from Ecuador to Chile and with far-field.