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Recent changes in ENSO’s impacts on the summertime circumglobal teleconnection and mid-latitude extremes

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  • Shankai Tang

    (and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
    Lanzhou University)

  • Shaobo Qiao

    (and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
    Ministry of Education)

  • Bin Wang

    (University of Hawaii at Manoa)

  • Fei Liu

    (and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
    Ministry of Education)

  • Xian Zhu

    (and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
    Ministry of Education)

  • Taichen Feng

    (and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
    Ministry of Education)

  • Guolin Feng

    (Yangzhou University
    China Meteorological Administration)

  • Wenjie Dong

    (and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
    Ministry of Education)

Abstract

The boreal summer circumglobal teleconnection (CGT) provides a primary predictability source for mid-latitude Northern Hemisphere climate anomalies and extreme events. Here, we show that the CGT’s circulation structure has been displaced westward by half a wavelength since the late 1970s, more severely impacting heatwaves and droughts over East Europe, East Asia, and southwestern North America. We present empirical and modelling evidence of the essential role of El Niño-Southern Oscillation (ENSO) in shaping this change. Before the late 1970s, ENSO indirectly promoted CGT by modulating the Indian summer monsoon rainfall (ISMR). Since 1980s, the ENSO–ISMR link has weakened, but the westward-displaced ENSO forcing has been able to directly trigger a Rossby wave response at the exit of the East Asian westerly jet, resulting in a shift of the previous CGT’s North Pacific and downstream centers westward along the westerly jet waveguide. State-of-the-art climate models with prescribed anthropogenic forcing cannot simulate these changes, suggesting that they are driven by natural variability. This work highlights the importance of studying the impacts of changing ENSO to improve seasonal prediction of mid-latitude extreme events.

Suggested Citation

  • Shankai Tang & Shaobo Qiao & Bin Wang & Fei Liu & Xian Zhu & Taichen Feng & Guolin Feng & Wenjie Dong, 2025. "Recent changes in ENSO’s impacts on the summertime circumglobal teleconnection and mid-latitude extremes," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-55925-8
    DOI: 10.1038/s41467-025-55925-8
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