H/T to Paul Vaughan for pointing to a series of comments by Bill Illis on wuwt, which describe and differentiate between the under-ice salt induced sinking which forms Arctic deep water and the Greenland-melt surface waters which flow into the Gulf Stream. These were in response to an alarmist paper which claims that increased freshwater flux could weaken the AMOC and thus global circulation.
Bill Illis responds:
And the salinity in the ocean in the area in question has changed by exactly ZERO. The paper doesn’t address this issue one iota.
The AMOC starts under the sea ice throughout the entire Arctic Ocean basin. Somehow climate scientists have convinced themselves that the deep water formation of the AMOC is next to Greenland. There is no way to correct them because they don’t actually care what the facts are, just what gets them published in the climate theology field.
The sea surface temperatures in the Norwegian Sea range from +2.0C to +10.0C.
The Arctic Bottom Water is -0.5C to -1.0C and is 3000 metres deeper. it has nothing to do with the Nowegian Sea.
The Arctic Bottom Water overflows the canyons and chokepoints out of the Arctic Ocean basin, particularly the Fram Strait canyon, the Denmark Strait and the Greenland-Scotland Ridge.