A shutdown would have devastating global impacts and must not be allowed to happen, researchers say
, according to a 2019 analysis, resulting in “an existential threat to civilisation”. A major report from the Intergovernmental Panel on Climate Change, due on Monday, is expected to set out the worsening state of the climate crisis.
The AMOC is driven by dense, salty seawater sinking into the Arctic ocean, but the melting of freshwater from Greenland’s ice sheet is slowing the process down earlier than climate models suggested. Eight independently measured datasets of temperature and salinity going back as far as 150 years enabled Boers to show that global heating is indeed increasing the instability of the currents, not just changing their flow pattern.
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