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. 2016 Aug 15;113(35):9710–9715. doi: 10.1073/pnas.1524766113

Fig. S2.

Fig. S2.

Reference curves of CH4 vs. δ18Oatm color-coded for age. (A) Zoom in on Eemian section of scatterplot with a three-point smoothing over the curve, which is used to interpolate sample ages. (B) Reference curve based on EPICA Dome C CH4 and δ18Oatm data (130-427 ka; refs. 13, 14).