Witkowski et al. (2013)
Also: Witkowski et al. 2013
Molecular fossils from phytoplankton reveal secular pCO2 trend over the Phanerozoic
Witkowski, C.R., Weijers, J.W., Blais, B., Schouten, S. & Sinninghe Damste, J.S. (2013). Molecular fossils from phytoplankton reveal secular pCO2 trend over the Phanerozoic. Geochimica et Cosmochimica Acta. 4(11),eaat4556. Article
https://doi.org/10.1016/j.gca.2012.11.033
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.