Lorius et al. 1990
Lorius, C., J. Jouzel, D. Raynaud,, and H. Le Treut, 1990: The ice-core record: Climate sensitivity and future greenhouse warming. Nature, 347, 139-145, doi:10.1038/347139a0.
The prediction of future greenhouse-gas-induced warming depends critically on the sensitivity of Earth's climate to increasing atmospheric concentrations of these gases. Data from cores drilled in polar ice sheets show a remarkable correlation between past glacial-interglacial temperature changes and the inferred atmospheric concentration of gases such as carbon dioxide and methane. These and other palaeoclimate data are used to assess the role of greenhouse gases in explaining past global climate change, and the validity of models predicting the effect of increasing concentrations of such gases in the atmosphere.