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In one paper, AMOC collapse only occurs in a full general circulation model after it ran for nearly 2000 years, and freshwater quantities (in Sv) increased to extreme values. [37] While the conditions are unrealistic, the model may also be unrealistically stable, and the full implications are not clear without more real-world observations [39]
An example of a switch between two equilibria in the AMOC is the Eocene-Oligocene transition (EOT) 34 MA ago, where proxies of the deep circulation suggest the onset of the AMOC. This caused a major shift in the global climate towards colder and drier conditions.
An AMOC collapse “is a really big danger that we should do everything we can to avoid,” said Stefan Rahmstorf, a physical oceanographer at Potsdam University in Germany who was not involved in ...
The AMOC’s collapse could also cause sea levels to surge by around 1 meter (3.3 feet), van Westen said. ... Even though the study used a complex model, it still has a low resolution, he said ...
“The collapse of the AMOC has huge implications, and we can’t just sit back and say, ‘I don’t know, maybe we’re wrong,’” Susanne Ditlevsen says, shrugging. “I hope we’re wrong ...
The potential collapse of the subpolar gyre in this scenario (middle). The collapse of the entire AMOC (bottom). Some climate models indicate that the deep convection in Labrador-Irminger Seas could collapse under certain global warming scenarios, which would then collapse the entire circulation in the North subpolar gyre. It is considered ...
The world should pay attention to potential AMOC collapse, said Joel Hirschi, division leader at the United Kingdom's National Oceanography Centre. But there's a bigger global priority, he said.
Modelling evidence suggests that the 4.2 ka event was the result of a significant weakening of the Atlantic meridional overturning circulation (AMOC), disrupting global ocean currents and generating precipitation and temperature changes in various regions. [9] [10] The Intertropical Convergence Zone (ITCZ) abruptly shifted southward.