Studie von Forschenden des Institute for Marine and Atmospheric Research Utrecht, 9.2.2024 (engl. Orgininal)
The results here give a clear answer to a long-standing problem around in the climate research community concerning the existence of AMOC tipping behavior in GCMs (33, 44–48). Yes, it does occur in these models. This is bad news for the climate system and humanity as up until now one could think that AMOC tipping was only a theoretical concept and tipping would disappear as soon as the full climate system, with all its additional feedbacks, was considered. On the other hand, the tipping is consistent with the wealth of paleoclimate evidence that rapid changes have occurred in the AMOC, in particular during Dansgaard-Oeschger events (10).
The AMOC collapse dramatically changes the redistribution of heat (and salt) and results in a cooling of the Northern Hemisphere, while the Southern Hemisphere slightly warms. Atmospheric and sea-ice feedbacks, which were not considered in idealized climate models studies (29, 31, 32, 40), further amplify the AMOC-induced changes, resulting in a very strong and rapid cooling of the European climate with temperature trends of more than 3°C per decade. In comparison with the present-day global mean surface temperature trend (due to climate change) of about 0.2°C per decade, no realistic adaptation measures can deal with such rapid temperature changes under an AMOC collapse (49, 50).
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