It is just the latest in a string of records for the continent's sea ice, as scientists fear global heating could have shifted the region into a new era of disappearing ice, with far-reaching consequences for the world's climate and sea levels.
Each September Antarctica's sea ice reaches its maximum extent. The average between 1981 and 2010 was 18.71m sq km. But the US National Snow and Ice Data Center (NSIDC) said preliminary analysis suggested the sea ice had reached a maximum of 16.96m sq km on 10 September and had fallen away since then.
The 2023 maximum was 1.75m sq km below the long-term average and also about im sq km below the previous record low maximum that was set in 1986, the NSIDC's analysis found. Dr Will Hobbs, a sea ice scientist at the University of Tasmania, said that since April the rate of growth in Antarctica's sea ice had been "very, very slow".
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