Past atmospheric carbon dioxide levels are measured using ice core bubbles and fossilized plant stomata
the verdict
SUPPORTED
the evidence backs this
confidence 84/100
Past atmospheric carbon dioxide levels are well-established to be reconstructed using geochemical proxies, including ice core trapped gases and plant stomatal traits or carbon isotopes from the fossil record.
Evidence for · 3
Testing the accuracy of new paleoatmospheric CO2 proxies based on plant stable carbon isotopic composition and stomatal traits in a range of simulated paleoatmospheric O2:CO2 ratios
2019 · cited by 29
Paper 3 discusses paleoproxy CO2 methods utilizing plant stable carbon isotopic composition and stomatal traits.
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More for · 2
Low atmospheric CO(2) levels during the Permo- Carboniferous glaciation inferred from fossil lycopsids.
2002 · cited by 18
Paper 4 derives past atmospheric CO2 estimates from the stomatal indices of fossil lycopsids.
The sensitivity of reconstructed carbon dioxide concentrations to stomatal preparation methods using a leaf gas exchange model.
2025 · cited by 1
Paper 9 evaluates mechanistic models using stomatal traits and leaf carbon isotope ratios to reconstruct past atmospheric carbon dioxide concentrations.