Study Says Carbon Pollution Drove 90% Marine Heatwave Spread in Europe, Pushing Seas 6C Higher
Updated
Updated · The Guardian · Aug 19
Study Says Carbon Pollution Drove 90% Marine Heatwave Spread in Europe, Pushing Seas 6C Higher
3 articles · Updated · The Guardian · Aug 19
Summary
World Weather Attribution found Europe’s 2026 marine heatwaves have spread across 90% of the Bay of Biscay and Iberian coast and 80% of the western Mediterranean, with some waters 6C above normal.
The rapid analysis said fossil-fuel warming caused about two-thirds of the excess heat, adding roughly 2C in the Mediterranean, 1.4C in the Bay of Biscay and 1.3C around Ireland and the Channel.
In a preindustrial climate, the hottest fortnights this year would have been virtually impossible in three of four sea regions studied; in the Celtic region, such heat was estimated as a once-in-100-years event.
Researchers said removing climate change would have sharply reduced the affected area — from 70% to 9% in the eastern Mediterranean and from 80% to 30% in the Celtic region.
The findings add to evidence that hotter seas are worsening Europe’s climate toll by damaging marine ecosystems, raising overnight coastal temperatures and intensifying heavy rainfall over nearby land.
As European seas boil at record temperatures, are we witnessing a temporary heatwave or the permanent collapse of our marine ecosystems?
With oceans fueling drastically heavier coastal downpours, how will cities survive the hidden terrestrial threat of these supercharged marine heatwaves?
Could the bizarre influx of tropical marine life in British waters signal an irreversible and catastrophic shift in the global food web?