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Concept

El Niño-Southern Oscillation (ENSO)

A climate phenomenon characterized by periodic warming (El Niño) and cooling (La Niña) of the tropical Pacific Ocean, which disrupts global weather patterns. The 2026 event is part of this cycle but is expected to be exceptionally intense.

Catégorie : Environnement

Articles liés (2)

How heat on the Tibetan Plateau fuels powerful storms in California, half a world away

<figure><img src="https://images.theconversation.com/files/758947/original/file-20260909-60-qxmnah.jpg?ixlib=rb-4.1.1&rect=0%2C3%2C5349%2C3566&q=45&auto=format&w=1050&h=700&fit=crop" /><figcaption><span class="caption">Heavy rain from an atmospheric river sent the Los Angeles River, normally mostly empty, spilling over its sides in February 2024.</span> <span class="attribution"><a class="source" href="https://www.gettyimages.com/detail/news-photo/an-aerial-view-of-the-los-angeles-river-swollen-by-storm-news-photo/1989155402?adppopup=true">Mario Tama/Getty Images</a></span></figcaption></figure><p>The Tibetan Plateau may be on the other side of the world from California, but what happens on this high-altitude landscape in Asia can set off a chain of events that fuels powerful atmospheric rivers with flooding rainfall and heavy snow hitting the U.S. West Coast.</p> <p>My team of atmospheric scientists <a href="https://doi.org/10.1126/sciadv.aeg3577">discovered t

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10 j

2026’s El Niño is shaping up to be a doozy – it’s already affecting global shipping, fish behavior and heat

<figure><img src="https://images.theconversation.com/files/758972/original/file-20260909-50-gvrpvi.jpg?ixlib=rb-4.1.1&rect=0%2C0%2C3064%2C2042&q=45&auto=format&w=1050&h=700&fit=crop" /><figcaption><span class="caption">With deepening drought, worsened by El Niño, Panama Canal authorities cut the number of ships allowed to transit.</span> <span class="attribution"><a class="source" href="https://www.gettyimages.com/detail/news-photo/aerial-view-of-the-one-contribution-container-ship-sailing-news-photo/2271855697?adppopup=true">Martin Bernetti/AFP via Getty Images</a></span></figcaption></figure><p>El Niño is here, and forecasters warn that it’s likely to be bigger and stronger in 2026-27 than any El Niño event recorded in at least 150 years. </p> <p>During <a href="https://www.noaa.gov/understanding-el-nino">strong El Niños</a>, global air and ocean temperatures spike, and precipitation patterns shift dramatically – flooding rains deluge places that are normally

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10 j

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