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Indian Ocean Dipole leads to Atlantic Niño

Author

Listed:
  • Lei Zhang

    (University of Colorado)

  • Weiqing Han

    (University of Colorado)

Abstract

Atlantic Niño is the Atlantic equivalent of El Niño-Southern Oscillation (ENSO), and it has prominent impacts on regional and global climate. Existing studies suggest that the Atlantic Niño may arise from local atmosphere-ocean interaction and is sometimes triggered by the Atlantic Meridional Mode (AMM), with overall weak ENSO contribution. By analyzing observational datasets and performing numerical model experiments, here we show that the Atlantic Niño can be induced by the Indian Ocean Dipole (IOD). We find that the enhanced rainfall in the western tropical Indian Ocean during positive IOD weakens the easterly trade winds over the tropical Atlantic, causing warm anomalies in the central and eastern equatorial Atlantic basin and therefore triggering the Atlantic Niño. Our finding suggests that the cross-basin impact from the tropical Indian Ocean plays a more important role in affecting interannual climate variability than previously thought.

Suggested Citation

  • Lei Zhang & Weiqing Han, 2021. "Indian Ocean Dipole leads to Atlantic Niño," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26223-w
    DOI: 10.1038/s41467-021-26223-w
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    References listed on IDEAS

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    1. N. H. Saji & B. N. Goswami & P. N. Vinayachandran & T. Yamagata, 1999. "A dipole mode in the tropical Indian Ocean," Nature, Nature, vol. 401(6751), pages 360-363, September.
    2. Ping Chang & Yue Fang & R. Saravanan & Link Ji & Howard Seidel, 2006. "The cause of the fragile relationship between the Pacific El Niño and the Atlantic Niño," Nature, Nature, vol. 443(7109), pages 324-328, September.
    3. 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.
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    Cited by:

    1. Yuewen Ding & Pengfei Lin & Hailong Liu & Bo Wu & Yuanlong Li & Lin Chen & Lei Zhang & Aixue Hu & Yiming Wang & Yiyun Yao & Bowen Zhao & Wenrong Bai & Weiqing Han, 2024. "Emergence of decadal linkage between Western Australian coast and Western–central tropical Pacific," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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