Briffa et al. (1998)
Also: Briffa et al. 1998
Reduced sensitivity of recent tree-growth to temperature at high northern latitudes
Briffa, K. R., Schweingruber, F. H., Jones, P. D., Osborn, T. J., Shiyatov, S. G., & Vaganov, E. A. (1998). Reduced sensitivity of recent tree-growth to temperature at high northern latitudes. Nature, 391(6668), 678682. Link to abstract
doi:10.1038/35596
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.