Europe's warmer seas are appealing to swimmers - but what lies beneath is ‘alarming’, study warns

Key Points:

• A new study identifies climate change as the primary cause of rising sea temperatures across Europe, with the Mediterranean experiencing an increase of about 2°C this summer, severely affecting marine ecosystems.
• Researchers from the World Weather Attribution group combined observational data and climate models to estimate that climate change has added over 1.3-1.4°C of warming to Western European seas.
• The warming seas are causing significant ecological disruptions, including species migrating northward, which affects food chains, fisheries, and aquaculture, while also increasing coastal humidity and extreme heat risks.
• Marine heatwaves have expanded significantly, with 90% of the Bay of Biscay and Iberian coast and 80% of the Western Mediterranean experiencing such events this year, compared to about 40% without human-caused warming.
• Despite some benefits for certain species, experts warn that even small temperature increases can be lethal to sensitive organisms like coral reefs, leading to a reshuffling of marine communities with winners and losers.