Henehan et al. (2019)
Also: Henehan et al. 2019
Rapid ocean acidification and protracted Earth system recovery followed the end-Cretaceous Chicxulub impact
Henehan, M.J., Ridgwell, A., Thomas, E., Zhang, S., Alegret, L., Schmidt, D.N., Rae, J.W., Witts, J.D., Landman, N.H., Greene, S.E., Huber, B.T., Super, J.R., Planavsky, N.J. & Hull, P.M. (2019). Rapid ocean acidification and protracted Earth system recovery followed the end-Cretaceous Chicxulub impact. Proceedings of the National Academy of Sciences. 116(45),22500-22504. PDF
https://doi.org/10.1073/pnas.1905989116
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.