Santer et al. (2003)
Also: Santer et al. 2003
Contributions of Anthropogenic and Natural Forcing to Recent Tropopause Height Changes
Santer, B. D., Wehner, M. F., Wigley, T. M. L., Sausen, R., Meehl, G. A., Taylor, K. E., ... & Brüggemann, W. (2003). Contributions of anthropogenic and natural forcing to recent tropopause height changes. science, 301(5632), 479-483. Link to paper
DOI: 10.1126/science.1084123
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.