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    Science FridayHow El Niño shapes the world’s weather trends
    12 minEpisode 1298

    How El Niño shapes the world’s weather trends

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    Scientists studying climate models say there’s a high chance this will be an El Niño year—and that we could be in for a “super” El Niño. The difference is indicated by sea surface temperatures in part of the Pacific Ocean rising a little—or a lot—above their long-term average.

    El Niño is one half of what climatologists call the ENSO, the El Niño-Southern Oscillation. The oscillation operates on a roughly 3-7 year cycle, changing the path of the jet stream and shifting weather conditions around the world. An El Niño year, for instance, typically brings wetter weather in the western U.S. but dryer conditions in the Pacific Northwest, and can be a drought buster for regions such as southern California.

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    © Science Friday and WNYC StudiosLength 12 min12 May 2026Episode 1298ScienceFactsEducationalUSAEpisodic

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    Scientists studying climate models say there’s a high chance this will be an El Niño year—and that we could be in for a “super” El Niño. The difference is indicated by sea surface temperatures in part of the Pacific Ocean rising a little—or a lot—above their long-term average.

    El Niño is one half of what climatologists call the ENSO, the El Niño-Southern Oscillation. The oscillation operates on a roughly 3-7 year cycle, changing the path of the jet stream and shifting weather conditions around the world. An El Niño year, for instance, typically brings wetter weather in the western U.S. but dryer conditions in the Pacific Northwest, and can be a drought buster for regions such as southern California. But shifting ocean currents also have the potential to affect marine ecosystems, leading to algal booms, coral bleaching, and more.

    Climate scientist Dillon Amaya joins Host Ira Flatow to describe the role of the El Niño in shaping world weather, and what effects a particularly strong El Niño year might have on global ecosystems.

    Guest:

    Dr. Dillon Amaya is a research scientist at the NOAA Physical Sciences Laboratory in Boulder, Colorado.

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