The European Project for Ice Coring in Antarctica (EPICA) Dome C ice core record reconstructs atmospheric carbon dioxide levels for the last 800,000 years.
Notes on verification
Confirmed by peer-reviewed publication (Lüthi et al. 2008, Nature) and archived paleoclimatology data at NOAA NCEI. Widely cited and consistent across independent sources. [tier=silver indep_score=1.0 clusters=2 claim_tier=notable]
Sources
- NASA SVS | Dataset list (seed:science_and_space)
- https://www.ncei.noaa.gov/access/paleo-search/study/6091 (corroboration)
- https://www.nature.com/articles/nature06949 (corroboration)