https://en.wikipedia.org/wiki/Atlantic_meridional_overturning_circulation https://en.wikipedia.org/wiki/Atlantic_meridional_overturnin... It's a circulation in

https://en.wikipedia.org/wiki/Atlantic_meridional_overturning_circulation https://en.wikipedia.org/wiki/Atlantic_meridional_overturnin... It's a circulation in the Atlantic that pulls warm water from the equator up towards Europe and the arctic.