Strong influence of north Pacific Ocean variability on Indian summer heatwaves

Vittal Hari (), Subimal Ghosh, Wei Zhang and Rohini Kumar ()
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Vittal Hari: Indian Institute of Technology (Indian School of Mines)
Subimal Ghosh: Indian Institute of Technology Bombay
Wei Zhang: Utah State University
Rohini Kumar: UFZ-Helmholtz Centre for Environmental Research

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: 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

Date: 2022
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DOI: 10.1038/s41467-022-32942-5

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