Excess freshwater from melting ice in Greenland makes North Atlantic water less dense, reducing the AMOC's southward flow and slowing the circulation.
Notes on verification
Mechanism corroborated by multiple independent, credible sources including Britannica, UNSW research summary, and phys.org coverage of a peer-reviewed study, all consistent with mainstream oceanographic science on AMOC dynamics.
Sources
- Scientists Shed Light on the Mysterious 'Cold Blob' in ... (smithsonianmag.com)
- https://www.whoi.edu/ocean-learning-hub/ocean-topics/how-the-ocean-works/ocean-circulation/amoc/ (whoi.edu)
- https://www.unsw.edu.au/newsroom/news/2024/11/meltwater-greenland-arctic-weakening-ocean-circulation (unsw.edu.au)
- https://www.britannica.com/science/Atlantic-Meridional-Overturning-Circulation (britannica.com)
- https://www.geomar.de/en/discover/ocean-and-climate/ocean-observation/gulf-stream-and-atlantic-circulation (geomar.de)