Santer et al. (2007)
Also: Santer et al. 2007
Identification of human-induced changes in atmospheric moisture content
Santer, B. D., Mears, C., Wentz, F. J., Taylor, K. E., Gleckler, P. J., Wigley, T. M. L., Barnett, T. P., Boyle, J. S., Brüggemann, W., Gillett, N. P., Klein, S. A., Meehl, G. A., Nozawa, T., Pierce, D. W., Stott, P. A., Washington, W. M. & Wehner, M. F. (2007). Identification of human-induced changes in atmospheric moisture content. Proceedings of the National Academy of Sciences. 104(39),15248-15253. PDF
https://doi.org/10.1073/pnas.0702872104
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.