Santer et al. (2004)
Also: Santer et al. 2004
Identification of anthropogenic climate change using a second-generation reanalysis
Santer, B.D., Wigley, T.M., Simmons, A.J., Kållberg, P.W., Kelly, G.A., Uppala, S.M., Ammann, C., Boyle, J.S., Brüggemann, W., Doutriaux, C., Fiorino, M., Mears, C., Meehl, G.A., Sausen, R., Taylor, K.E., Washington, W.M., Wehner, M.F. & Wentz, F.J. (2004). Identification of anthropogenic climate change using a second-generation reanalysis. Journal of Geophysical Research: Atmospheres. 109(D21),-. PDF
https://doi.org/10.1029/2004jd005075
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.