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That's a terrifying prospect, and one of the most important parts of the new study is an early warning system, identified by Utrecht University oceanographer René van Westen and colleagues.
"We were able to develop a physics-based and observable early warning signal involving the salinity transport at the southern boundary of the Atlantic Ocean," Van Westen and team) is a large system of ocean currents that transfers warm salty water northward. This water cools on its winding journey north, which makes it denser.
Now, by modeling these ocean systems, van Westen and colleagues have found a way to detect when the AMOC 'tipping point' is near: the decline in salinity will slow down at the southernmost boundary of the Atlantic.
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