A sediment-core study concluded that AMOC weakening began around 1850, coinciding with the end of the Little Ice Age, which lasted from the 1300s to the 1850s.
Notes on verification
Confirmed by multiple independent sources including the original Nature study, WHOI press release, Scientific American, and UCL summary of follow-up research. Minor variation in Little Ice Age start date (13th-14th century) across sources is expected and non-contradictory. [cascade flags: aggregator_dropped_primary_exists | tier=silver indep_score=0.833 clusters=3 claim_tier=notable]
Sources
- Ocean Current That Keeps Europe Warm Is Weakening (seed:science_and_space)
- https://www.scientificamerican.com/article/slow-motion-ocean-atlantics-circulation-is-weakest-in-1-600-years/ (corroboration)
- https://www.whoi.edu/press-room/news-release/atlantic-ocean-circulation-at-weakest-point-in-more-than-1500-years/ (corroboration)
- https://www.ucl.ac.uk/news/2021/feb/earths-gulf-stream-system-its-weakest-over-millennium (corroboration)