Sarkar et al. (2019)
Also: Sarkar et al. 2019
Late Eocene onset of the Proto-Antarctic Circumpolar Current
Sarkar, S., Basak, C., Frank, M., Berndt, C., Huuse, M., Badhani, S. & Bialas, J. (2019). Late Eocene onset of the Proto-Antarctic Circumpolar Current. Scientific Reports. 9(1). PDF
https://doi.org/10.1038/s41598-019-46253-1
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.