https://phys.org/news/2019-03-deep-ocean-current-shift-year.html

Nick Balascio explained that the Gulf Stream/Deep Water system is known as the AMOC, or Atlantic Meridional Overturning Circulation. Balascio, an assistant professor in William & Mary's Department of Geology, is a member of a group of scientists that found evidence that changes in the strength of AMOC can serve as an precursor to massive future climate changes.

Their findings were published in the journal Nature Communications in a paper "Deep-water circulation changes lead North Atlantic climate during deglaciation." Deglaciation, or the widespread melting of glaciers, have triggered massive shifts in climate. Balascio explains that the team's evidence shows that a strengthening in the AMOC flow was a precursor to a sudden warming trend about 11,000 years ago.