Spahni et al. (2003)
Also: Spahni et al. 2003
The attenuation of fast atmospheric CH 4 variations recorded in polar ice cores
Spahni, R., Schwander, J., Flückiger, J., Stauffer, B., Chappellaz, J., & Raynaud, D. (2003). The attenuation of fast atmospheric CH4 variations recorded in polar ice cores. Geophysical Research Letters, 30(11). Link to paper
DOI: 10.1029/2003GL017093
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.