>>322496I know that but that's very different from "the world freezing". Ocean currents are a mechanism for heat re-distribution across the Earth, they aren't themselves a climate forcing.
The unsettling thing is that as climate modelling becomes more accurate, a significant slowdown of the MOC in the North Atlantic seems more likely rather than less likely. James Hansen and Wei Liu independently correctly mistakes in the parametrization for small-scale mixing and the salt budget in the northern Atlantic and both their models show a significant slowdown of the North Atlantic Gyre within a couple of centuries.
