Royer (2006)
Also: Royer 2006
CO2-forced climate thresholds during the Phanerozoic
Royer, D. L. (2006). CO2-forced climate thresholds during the Phanerozoic. Geochimica et Cosmochimica Acta, 70(23), 5665-5675. Link to PDF
doi:10.1016/j.gca.2005.11.031
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.