Sea-ice measurements in Antarctica have registered a new minimum, breaking the record set only one year ago.
There is now less sea-ice surrounding the Antarctic continent than at any time since we began using satellites to measure it in the late 1970s.
Three of the last record-breaking years for low sea-ice have happened in the past seven years: 2017, 2022 and now 2023. Computer models had predicted that it would show long-term decline, much like we have seen in the Arctic, where summer sea-ice extent has been shrinking by 12-13% per decade as a result of global warming.Data sources other than satellites allow us to look back at least as far as 1900.
This is part of the engine that drives the great ocean conveyor - the mass movement of water that helps regulate energy in the climate system.In the Antarctic, the algae that cling to the ice are a source of food for the small crustaceans known as krill, which are a basic food resource for whales, seals, penguins and other birds.Warm air increasing melt
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