I read recently that there are two bulbs of magma one of which is heating up
greenland and making the ice melt. The other one is under Iceland and
causing present distruption.
The Amoc and the possibility of it switching off was raised 50 years ago.
If Amoc switches off it will create climate change. The warming via climate
change will not cause the Amoc to switch off. A great chunck of ongoing heat
will upset Amoc balance and then it will cool down.