Rommelaere et al. (1997)
Also: Rommelaere et al. 1997
Reconstructing recent atmospheric trace gas concentrations from polar firn and bubbly ice data by inverse methods
Rommelaere, V., Arnaud, L., & Barnola, J. M. (1997). Reconstructing recent atmospheric trace gas concentrations from polar firn and bubbly ice data by inverse methods. Journal of Geophysical Research: Atmospheres, 102(D25), 30069-30083. Link to paper.
DOI: 10.1029/97JD02653
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.