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Strong influence of north Pacific Ocean variability on Indian summer heatwaves

Author

Listed:
  • Vittal Hari

    (Indian Institute of Technology (Indian School of Mines)
    UFZ-Helmholtz Centre for Environmental Research)

  • Subimal Ghosh

    (Indian Institute of Technology Bombay
    Indian Institute of Technology Bombay)

  • Wei Zhang

    (Utah State University)

  • Rohini Kumar

    (UFZ-Helmholtz Centre for Environmental Research)

Abstract

Increased occurrence of heatwaves across different parts of the world is one of the characteristic signatures of anthropogenic warming. With a 1.3 billion population, India is one of the hot spots that experience deadly heatwaves during May-June – yet the large-scale physical mechanism and teleconnection patterns driving such events remain poorly understood. Here using observations and controlled climate model experiments, we demonstrate a significant footprint of the far-reaching Pacific Meridional Mode (PMM) on the heatwave intensity (and duration) across North Central India (NCI) – the high risk region prone to heatwaves. A strong positive phase of PMM leads to a significant increase in heatwave intensity and duration over NCI (0.8-2 °C and 3–6 days; p

Suggested Citation

  • Vittal Hari & Subimal Ghosh & Wei Zhang & Rohini Kumar, 2022. "Strong influence of north Pacific Ocean variability on Indian summer heatwaves," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32942-5
    DOI: 10.1038/s41467-022-32942-5
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    References listed on IDEAS

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    1. Neethu C & K V Ramesh, 2023. "Projected changes in heat wave characteristics over India," Climatic Change, Springer, vol. 176(10), pages 1-26, October.

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