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Northeast Pacific warm blobs sustained via extratropical atmospheric teleconnections

Author

Listed:
  • Jian Shi

    (Ocean University of China
    Ocean University of China
    Laoshan Laboratory)

  • Hao Huang

    (Ocean University of China
    Ocean University of China)

  • Alexey V. Fedorov

    (Yale University
    Sorbonne University)

  • Neil J. Holbrook

    (University of Tasmania
    University of Tasmania)

  • Yu Zhang

    (Ocean University of China
    Laoshan Laboratory)

  • Ruiqiang Ding

    (Beijing Normal University)

  • Yongyue Luo

    (Ocean University of China
    Ocean University of China)

  • Shengpeng Wang

    (Laoshan Laboratory)

  • Jiajie Chen

    (Ocean University of China
    Ocean University of China)

  • Xi Hu

    (Ocean University of China
    Ocean University of China)

  • Qinyu Liu

    (Ocean University of China)

  • Fei Huang

    (Ocean University of China
    Ocean University of China
    Laoshan Laboratory)

  • Xiaopei Lin

    (Ocean University of China
    Ocean University of China
    Laoshan Laboratory)

Abstract

Large-scale marine heatwaves in the Northeast Pacific (NEP), identified here and previously as ‘warm blobs’, have devastating impacts on regional ecosystems. An anomalous atmospheric ridge over the NEP is known to be crucial for maintaining these warm blobs, also causing abnormally cold temperatures over North America during the cold season. Previous studies linked this ridge to teleconnections from tropical sea surface temperature anomalies. However, it was unclear whether teleconnections from the extratropics could also contribute to the ridge. Here we show that planetary wave trains, triggered by increased rainfall and latent heat release over the Mediterranean Sea accompanied by decreased rainfall over the North Atlantic, can transport wave energy to the NEP, guided by the westerly jet, and induce a quasi-barotropic ridge there. Our findings provide insights into extratropical teleconnections sustaining the NEP ridge, offering a source of potential predictability for the warm blobs and temperature fluctuations over North America.

Suggested Citation

  • Jian Shi & Hao Huang & Alexey V. Fedorov & Neil J. Holbrook & Yu Zhang & Ruiqiang Ding & Yongyue Luo & Shengpeng Wang & Jiajie Chen & Xi Hu & Qinyu Liu & Fei Huang & Xiaopei Lin, 2024. "Northeast Pacific warm blobs sustained via extratropical atmospheric teleconnections," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47032-x
    DOI: 10.1038/s41467-024-47032-x
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    References listed on IDEAS

    as
    1. Shineng Hu & Alexey V. Fedorov, 2019. "Indian Ocean warming can strengthen the Atlantic meridional overturning circulation," Nature Climate Change, Nature, vol. 9(10), pages 747-751, October.
    2. Shineng Hu & Alexey V. Fedorov, 2020. "Indian Ocean warming as a driver of the North Atlantic warming hole," Nature Communications, Nature, vol. 11(1), pages 1-11, December.
    3. Neil J. Holbrook & Hillary A. Scannell & Alexander Gupta & Jessica A. Benthuysen & Ming Feng & Eric C. J. Oliver & Lisa V. Alexander & Michael T. Burrows & Markus G. Donat & Alistair J. Hobday & Pippa, 2019. "A global assessment of marine heatwaves and their drivers," Nature Communications, Nature, vol. 10(1), pages 1-13, December.
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