The region of sea just south of Greenland has temperature data dating back to 1870.
Notes on verification
Confirmed by multiple independent sources including Science News, The Week, and peer-reviewed studies (Rahmstorf et al. 2026, Born 2023) that consistently cite temperature/heat flux data for this region extending back to 1870.
Sources
- Is the Atlantic Ocean's great conveyer belt really slowing ... (nationalgeographic.com)
- https://www.sciencenews.org/article/cold-blob-may-signal-current-decline (sciencenews.org)
- https://theweek.com/environment/cold-blob-atlantic-ocean-currents-climate-change (theweek.com)
- https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL118383 (agupubs.onlinelibrary.wiley.com)
- https://esd.copernicus.org/articles/14/685/2023/ (esd.copernicus.org)