Taylor Dome CO2 and d13CO2 data "1. Replicates at 180.265 m (2 samples), 378.685/378.755 m (2 samples), 388.09/388.195 m (3 samples); these" duplicates and their averages are highlighted in grey. "2. The total 1-sigma uncertainty in the reported delta13CO2 of a single sample, including uncertainties in the" "gravitational and N2O corrections, is 0.085‰. Duplicate analyses of samples with air ages of 2.19 and 17.2 kyBP" "have 1-sigma uncertainties of 0.060‰, and a triplicate analysis of the sample with an air age of 27.4 kyBP has a" 1-sigma uncertainty of 0.049‰. 3. CO2 concentrations measurements have a 1-sigma uncertainty of 1.5 ppmv. "4. Ice age and air age values used are from the st9810 age scale of Steig et al. (Science 282, 92-95, 1998)." "5. Analytical details and descriptions of samples and data in Smith et al. (Nature 400, 248-250, 1999)."