Amano et al. (2010)
Also: Amano et al. 2010
A 250-year index of first flowering dates and its response to temperature changes
Amano, T., Smithers, R.J., Sparks, T.H. & Sutherland, W.J. (2010). A 250-year index of first flowering dates and its response to temperature changes. Proceedings of the Royal Society B: Biological Sciences. 277(1693),2451-2457. PDF
https://doi.org/10.1098/rspb.2010.0291
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.