There's a terrific new article by @carbonbrief.org on the Atlantic Meridional Overturning Circulation with some great animations. Strongly recommended. I've been reading it ahead of giving a lecture on the risks of climate change tomorrow. interactive.carbonbrief.org/amoc-explain...
The AMOC is under threat from human-caused climate change, as warming seas, melting ice and increased rainfall upset the temperature and salt balance of the North Atlantic.