Trudinger et al. (2002)
Also: Trudinger et al. 2002
Reconstructing atmospheric histories from measurements of air composition in firn
Trudinger, C. M., Etheridge, D. M., Rayner, P. J., Enting, I. G., Sturrock, G. A., & Langenfelds, R. L. (2002). Reconstructing atmospheric histories from measurements of air composition in firn. Journal of Geophysical Research: Atmospheres, 107(D24). Link to paper.
DOI: 10.1029/2002JD002545
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.