Clarkson et al (2015)
Also: Clarkson et al 2015
Ocean acidification and the Permo-Triassic mass extinction
Clarkson, M. O., Kasemann, S. A., Wood, R. A., Lenton, T. M., Daines, S. J., Richoz, S., ... & Tipper, E. T. (2015). Ocean acidification and the Permo-Triassic mass extinction. Science, 348(6231), 229-232.
http://www.research.ed.ac.uk/portal/files/19061200/Clarkson_Science_manuscript_submission.pdf
DOI: 10.1126/science.aaa0193
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.