Palaeo-oceanographic evidence from sediment cores indicates that Atlantic Meridional Overturning Circulation (AMOC) has been anomalously weak over the past 150 years or so, since the end of the Little Ice Age around AD 1850.
Sources
- Ocean Current That Keeps Europe Warm Is Weakening (smithsonianmag.com)
- https://www.nature.com/articles/s41586-018-0007-4 (nature.com)
- https://www.scientificamerican.com/article/slow-motion-ocean-atlantics-circulation-is-weakest-in-1-600-years/ (scientificamerican.com)
- https://www.whoi.edu/press-room/news-release/atlantic-ocean-circulation-at-weakest-point-in-more-than-1500-years/ (whoi.edu)
- https://www.ucl.ac.uk/news/2021/feb/earths-gulf-stream-system-its-weakest-over-millennium (ucl.ac.uk)