The deep ocean and surface water don't overturn because of differences in density, so the exchange is
via global circulation.
Not exact matches
Its role within the
global thermohaline
circulation, which provides heat
via the Gulf Stream to northwestern Europe, is therefore likely to be profound.
There is some speculation that
global warming could,
via a shutdown or slowdown of the thermohaline
circulation, trigger localised cooling in the North Atlantic and lead to cooling, or lesser warming, in that region.
Global image
circulation via social media is generally perceived as either over-controlled or out of control.
As the authors point out, even if the whole story comes down to precipitation changes which favor ablation, the persistence of these conditions throughout the 20th century still might be an indirect effect of
global warming,
via the remote effect of sea surface temperature on atmospheric
circulation.
And no, there is no huge plunge in tropical or
global surface air temperatures when the ocean
circulation spins up because there is a near - compensating decrease in poleward heat transport
via the atmospheric
circulation.