Were the Atlantic Meridional Overturning Circulation (AMOC) to collapse, sea levels along the U.S. East coast could rise by up to a meter because it carries warm and cold water between the poles. Warming waters would accumulate there instead of flowing northward. The flow might have weakened by 15% since the middle of the 20th century, the weakest it’s been in a millennium. New calculations indicate it might tip again in 2057, plunging northern Europe into a deep cold spell, crushing food systems, condemning big regions to drought. The worst effects would be likely to hit the tropics. This would be much sooner than scientists have thought.
www.wired.com/story/amoc-collapse-atlantic-ocean/