El Niño–Southern Oscillation (ENSO) is a coupled ocean–atmosphere phenomenon in the tropical Pacific characterized by quasi-periodic fluctuations between warm (El Niño), cold (La Niña), and neutral phases. It arises from interactions among equatorial Pacific sea-surface temperatures, trade winds, and the Walker circulation, producing large-scale anomalies in convection, thermocline depth, and surface pressure, notably the Southern Oscillation index. ENSO modulates global atmospheric circulation, altering precipitation, temperature, and storm tracks on interannual timescales, and serves as a key source of seasonal-to-interannual climate variability and predictability in climate diagnostics and modeling.
Temperatures have warmed dramatically across the equatorial Pacific Ocean in 2026, signaling the onset of a strong and potentially historic El Niño. These events can affect weather around the world, and the intensity of recent ...
Environment
Aug 28, 2026
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As an El Niño of historic proportions is taking shape in the tropical Pacific, a University of Michigan study has found that El Niño events have become nearly 40% stronger in the last 40 years than they were in the preindustrial ...
Earth Sciences
Aug 27, 2026
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As of August 2026, the world is bracing for what forecasters describe as one of the strongest El Niño events on record. The U.S. National Oceanic and Atmospheric Administration's (NOAA) Climate Prediction Center has put the ...
Environment
Aug 26, 2026
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India is currently in the middle of its summer monsoon, but this year's rainfall presents an interesting paradox. Much of the country has received less rain than usual so far, yet has still been hit by severe floods and landslides. ...
Environment
Aug 25, 2026
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Marine heat waves and extreme ocean acidification events are each damaging on their own. But when both stressors hit simultaneously, their individual effects can be exacerbated.
Earth Sciences
Aug 24, 2026
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This year's El Niño weather pattern will be the biggest in more than a century and could make 2027 the hottest year globally, Britain's national weather agency predicted Friday.
Environment
Aug 21, 2026
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This year's El Niño is on track to be the strongest on record, threatening to unleash extreme weather across the globe and make 2027 the hottest recorded year by far.
Environment
Aug 21, 2026
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A strengthening tropical storm named Lala is set to hit Hawaii's Big Island with hurricane-force gales on Saturday, bringing dangerous winds, rainfall and heavy surf.
Environment
Aug 15, 2026
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You may have heard reports of fish die-offs or seen photos of hauntingly bleached coral.
Environment
Aug 13, 2026
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Regions home to around 900 million people experienced their hottest July on record in 2026, including in the Sahel, Central America, France and Spain, according to AFP analysis of Copernicus data.
Environment
Aug 10, 2026
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