Trillions of tonnes of cold, highly salty and oxygen-rich water sink around Antarctica each year. theSun theSundaily climatechange study ocean Antarctic
Penguins are seen on an iceberg as scientists investigate the impact of climate change on Antarctica’s penguin colonies, on the northern side of the Antarctic peninsula, Antarctica January 15, 2022. Picture taken January 15, 2022. REUTERSPIX: Rapidly melting Antarctic ice threatens to dramatically slow deep-water currents in the world's oceans, scientists say, impacting the spread of fresh water, oxygen and life-sustaining nutrients for centuries.
The “overturning circulation” of waters in the deepest reaches of the oceans would slow by 40 percent by 2050 in a high-emissions scenario, according to the study, which warned of impacts that would last “for centuries to come”. Trillions of tonnes of cold, highly salty and oxygen-rich water sink around Antarctica each year, sending a deep-water current northwards to the Indian, Pacific and Atlantic oceans, scientists say.
UNSW emeritus professor John Church, who was not involved in the study, said there were many uncertainties about the impact of a declining deep ocean circulation.
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