These deep ocean tides supply almost half of the world's oceans with vital nutrients and oxygen, but melting ice shelves are slowing them down.
Deep ocean currents around Antarctica that are vital to marine life have slowed by 30% since the 1990s and could soon grind to a complete halt, a new study finds.
"If the oceans had lungs, this would be one of them," Matthew England, a professor of ocean and climate dynamics at the University of New South Wales in Sydney, Australia who contributed to the research, said in a statement. Researchers in the U.K. and Australia collaborated in a study published in March in the journal Nature that predicted a 40% reduction in the strength of Antarctic bottom waters by 2050.
Dwindling circulation around Antarctica could slow down the global network of abyssal currents and trap nutrients and oxygen in the ocean depths, with knock-on effects for marine life and productivity. RELATED STORIES—Climate change could trigger gigantic deadly tsunamis from Antarctica, new study warns—'Factorian Deep,' the new deepest point in Antarctica's Southern Ocean, mapped for the first time
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