Extended Data Fig. 3: S27 δO2/N2 data measured from ice above 140 m reported by Spaulding et al.42 (black circles) and Yan et al.30 (red circles) superimposed on the insolation at local (77 S) summer solstice. | Nature Geoscience

Extended Data Fig. 3: S27 δO2/N2 data measured from ice above 140 m reported by Spaulding et al.42 (black circles) and Yan et al.30 (red circles) superimposed on the insolation at local (77 S) summer solstice.

From: Early Pleistocene East Antarctic temperature in phase with local insolation

Extended Data Fig. 3

Error bars represent the pooled standard error of the δO2/N2 measurements reported by Spaulding et al.42 (black; ± 2.99 ‰; unique sample number N = 38) and Yan et al.30 (red; ± 2.69 ‰; unique sample number N = 45). Each unique samples have two replicates with the mean value reported. Note that the y-axis for insolation is reversed. The two shallowest δO2/N2 in Yan et al.30 (marked by arrows) are not included in this study in view of suspected intrusion of modern air.

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