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.
Notes on verification
Corrected 2026-09-06 verification pass: original wording paraphrased loosely and mis-attributed the primary. Rewritten near-verbatim from the Thornalley et al. 2018 Nature abstract, which states palaeo-oceanographic evidence that Labrador Sea deep convection and the AMOC have been anomalously weak over the past 150 years or so (since the end of the Little Ice Age, LIA, approximately ad 1850). Primary source reassigned from Smithsonian Magazine (source_id=130) to Thornalley 2018 Nature paper (source_id=2693, DOI: nature.com/articles/s41586-018-0007-4). Cleared aggregator_dropped_primary_exists flag. Tier upgraded to gold: Nature peer-reviewed primary + 3 corroborating (WHOI, Scientific American, UCL). [tier=gold indep_score=0.900 clusters=3 claim_tier=notable reviewed_by=verification_pass_2026_09_06]
Sources
- Ocean Current That Keeps Europe Warm Is Weakening (seed:science_and_space)
- https://www.nature.com/articles/s41586-018-0007-4 (corroboration)
- 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)