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Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming

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  • Yiqun Tian

    (Duke University)

  • Shineng Hu

    (Duke University)

  • Clara Deser

    (National Center for Atmospheric Research)

Abstract

The tropical Indian Ocean (TIO) has experienced enhanced surface warming relative to the tropical mean during the past century, but the underlying mechanisms remain unclear. Here we use single-forcing, large-ensemble coupled model simulations to demonstrate that changes of biomass burning (BMB) aerosols have played a critical role in this TIO relative warming. Although the BMB aerosol changes have little effect on global mean temperatures due to regional cancellation, they significantly influence the pattern of warming over the tropical oceans. The reduction of BMB aerosols over the Indian subcontinent induces a TIO warming, while the increase of BMB aerosols over South America and Africa causes a cooling of the tropical Pacific and Atlantic, respectively. The resultant TIO relative warming leads to prominent global climate changes, including a westward expanded Indo-Pacific warm pool, a fresher TIO due to enhanced rainfall, and an intensified North Atlantic jet stream affecting European hydroclimate.

Suggested Citation

  • Yiqun Tian & Shineng Hu & Clara Deser, 2023. "Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39204-y
    DOI: 10.1038/s41467-023-39204-y
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    References listed on IDEAS

    as
    1. C. Deser & F. Lehner & K. B. Rodgers & T. Ault & T. L. Delworth & P. N. DiNezio & A. Fiore & C. Frankignoul & J. C. Fyfe & D. E. Horton & J. E. Kay & R. Knutti & N. S. Lovenduski & J. Marotzke & K. A., 2020. "Insights from Earth system model initial-condition large ensembles and future prospects," Nature Climate Change, Nature, vol. 10(4), pages 277-286, April.
    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. Hunter Brown & Xiaohong Liu & Rudra Pokhrel & Shane Murphy & Zheng Lu & Rawad Saleh & Tero Mielonen & Harri Kokkola & Tommi Bergman & Gunnar Myhre & Ragnhild B. Skeie & Duncan Watson-Paris & Philip St, 2021. "Biomass burning aerosols in most climate models are too absorbing," Nature Communications, Nature, vol. 12(1), pages 1-15, December.
    4. 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.
    5. C. Deser & F. Lehner & K. B. Rodgers & T. Ault & T. L. Delworth & P. N. DiNezio & A. Fiore & C. Frankignoul & J. C. Fyfe & D. E. Horton & J. E. Kay & R. Knutti & N. S. Lovenduski & J. Marotzke & K. A., 2020. "Publisher Correction: Insights from Earth system model initial-condition large ensembles and future prospects," Nature Climate Change, Nature, vol. 10(8), pages 791-791, August.
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    Cited by:

    1. Shuo Fu & Shineng Hu & Xiao-Tong Zheng & Kay McMonigal & Sarah Larson & Yiqun Tian, 2024. "Historical changes in wind-driven ocean circulation drive pattern of Pacific warming," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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