'We Don't Know Where the Tipping Point Is': Climate Expert on Potential Collapse of Atlantic Circulation

Scientists from 15 countries warned in an open letter that the potential collapse of the Atlantic Ocean's main circulation system (AMOC) has been "greatly underestimated" and could have devastating global impacts, according to oceanographer Stefan Rahmstorf who spoke to The Guardian. The AMOC system, which moves heat through the northern Atlantic and influences weather patterns across Europe, has shown signs of weakening over the past 60-70 years due to global warming, with indicators including a persistent cold spot in the northern Atlantic and record-low salt levels in seawater.

Rahmstorf, who heads the Earth system analysis department at Germany's Potsdam Institute for Climate Impact Research, estimates a 50% chance of the system reaching a critical tipping point this century, which could trigger severe consequences including regional cooling in northwestern Europe, shifting rainfall patterns, and rising sea levels.

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