Carbon Pollution Fueled Europe's Marine Heatwave Surge
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- World Weather Attribution research found carbon pollution fuelled a 'massive expansion' of marine heatwaves across European seas this summer, with some waters recording temperatures 6C higher than normal.
- Climate breakdown was responsible for about two-thirds of the observed excess heat, warming Mediterranean waters by roughly 2C, the Bay of Biscay and Iberian Peninsula by 1.4C, and waters around Ireland and the Channel by 1.3C.
- The study found marine heatwaves hit 90% of the Bay of Biscay and Iberian coast region and 80% of the western Mediterranean — figures the researchers said would be roughly half as large in a climate unaltered by human activity.
- Removing the effect of climate breakdown cut expected heatwave area from 70% to 9% in the eastern Mediterranean and from 80% to 30% in the Celtic region around the British Isles.
- Claire Bergin of Maynooth University warned that warmer seas could 'completely reshape ecosystems that coastal communities rely on for food and income' and drive damaging extreme weather on land.
- Separate January research cited in the coverage found marine heatwaves intensify extreme rainfall over nearby coastal land by 20-30%, linking ocean warming to inland flooding risk.
- Mohamed Adow of Power Shift Africa said 'Europe cannot acknowledge the science with one hand while continuing to expand fossil fuels with the other,' criticising the continent's continued fossil fuel build-out.
Why it matters: The analysis, though not yet peer-reviewed, gives coastal communities and European policymakers a region-by-region quantification of how much human-caused warming is amplifying marine extremes — and the cited link between marine heatwaves and 20-30% heavier extreme rainfall on land ties ocean warming directly to inland flood risk across the continent.
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