Schurer et al. (2018)
Also: Schurer et al. 2018
Interpretations of the Paris climate target
Schurer, A. P., Cowtan, K., Hawkins, E., Mann, M. E., Scott, V., & Tett, S. F. B. (2018). Interpretations of the Paris climate target. Nature Geoscience, 11(4), 220. Link to PDF
https://doi.org/10.1038/s41561-018-0086-8
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.