Study finds planetary waves linked to wild summer weather have tripled since 1950
'A classic pattern would be like a high pressure out west (in the United States) and a low pressure back East and in summer 2018, that's exactly what we had,' Mann said. 'We had that configuration locked in place for like a month. So they (in the West) got the heat, the drought and the wildfires. We (in the East) got the excessive rainfall.'
'It's deep and it's persistent,' Mann said. 'You accumulate the rain for days on end or the ground is getting baked for days on end.'
The study finds this is happening more often because of human-caused climate change, mostly from the burning of fossil fuels, specifically because the Arctic warms three to four times faster than the rest of the world. That means the temperature difference between the tropics and the Arctic is now much smaller than it used to be and that weakens the jet streams and the waves, making them more likely to get locked in place, Mann said.
'This study shines a light on yet another way human activities are disrupting the climate system that will come back to bite us all with more unprecedented and destructive summer weather events,' said Jennifer Francis, a climate scientist at the Woodwell Climate Research Center who wasn't involved in the research.
'Wave resonance does appear to be one reason for worsening summer extremes. On top of general warming and increased evaporation, it piles on an intermittent fluctuation in the jet stream that keeps weather systems from moving eastward as they normally would, making persistent heat, drought, and heavy rains more likely,' Francis said.
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Hindustan Times
a day ago
- Hindustan Times
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Hindustan Times
5 days ago
- Hindustan Times
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Japan has institutionalised its heat alert system into school protocols, urban planning, and public health advisories, setting a global benchmark. In India, there is an urgent need to establish district cooling hubs, hydration centres, and train primary healthcare workers to respond to heat- and flood-related illnesses. Post-disaster mental health support also deserves more systematic integration into national health strategies. * Financing resilience: A major bottleneck in scaling preparedness is finance. However, innovative models are emerging. From 2028, Indian banks will mandate climate-risk disclosures and stress testing for businesses, a critical first step toward climate-informed financial systems. Kenya offers another powerful model through its County Climate Change Funds, which decentralise adaptation finance and align spending with local priorities. 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Time of India
16-07-2025
- Time of India
Santa's village swelters: Even travelling to the Arctic Circle won't save you from a heatwave
Synopsis Rovaniemi, Finland, witnessed a record-breaking 30°C, highlighting climate change's impact in the Arctic. Across Europe, the intense heatwave has resulted in numerous fatalities, with studies indicating climate change made it significantly more deadly. While some European nations are implementing heat regulations for outdoor workers, concerns remain regarding enforcement and comprehensive coverage.
