# World’s seas absorbed a record 23 zettajoules of heat last year

https://mins.news/en/item/79767

- The Guardian, 2026-09-30 06:00 UTC
- Science
- Original: https://www.theguardian.com/environment/2026/sep/30/worlds-seas-warmed-23-zettajoules-2025

> The world’s oceans absorbed a record 23 zettajoules of heat last year, making them hotter, higher and less hospitable, a Copernicus report found. Sea levels rose faster between 2012 and 2025, while ocean acidity increased 17% over four decades. The report documented widespread coral bleaching, altered phytoplankton growth and failed emperor penguin breeding.