Overview

• At a Royal Society meeting in London on 29–30 September, experts reported Antarctica is changing faster than anticipated, with impacts already felt worldwide.
• New analysis in Nature Geoscience finds Antarctic climate impacts are worse than assumed, describing a "Greenlandization" marked by shrinking sea ice, warming and faster ice flow.
• The Southern Ocean is absorbing up to three quarters of excess heat from greenhouse gases, shifting circulation and hastening Antarctic ice melt, researchers said.
• Met Office scientists warned that poorly understood tipping points could commit the world to more than ten meters of sea‑level rise by 2300 if thresholds are crossed.
• Scientists highlighted risks to key ecosystems, including krill and deep‑sea sponge and coral habitats, with consequences for fisheries, biodiversity and the carbon cycle.