Broadly stable atmospheric CO2 and CH4 levels over the past 3 million years
Lüthi, D. et al. High-resolution carbon dioxide concentration record 650,000–800,000 years before present. Nature 453, 379–382 (2008). Article …
Global ocean heat content over the past 3 million years
Shackleton, S. et al. Miocene and Pliocene ice and air from the Allan Hills blue ice area, East…