Meehl et al. (2003)
Also: Meehl et al. 2003
Solar and Greenhouse Gas Forcing and Climate Response in the Twentieth Century
Meehl, G.A., Washington, W.M., Wigley, T. M. L., Arblaster, J.M. & Dai, A. (2003). Solar and Greenhouse Gas Forcing and Climate Response in the Twentieth Century. Journal of Climate. 16(3),426-444. Article
https://doi.org/10.1175/1520-0442(2003)0162.0.co;2
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.