Variability of the Earth’s climate - Ice Ages and Interglacials: Measurements, Interpretation, and Models - page 53

Time (Myr BP)
Figure 2.14. Estimates of CO 2 concentration over the past 20 million years (adapted from
Kohler, 2011).
CO 2 (ppmv)
Figure 2.15. Dependence of D T NH on CO 2 concentration as presented by Kohler (2011) based
on van de Wal et al. (2011).