Fig. 3. Correlation between D, a proxy for Antarctic temperature, and CO₂ for three data sets. The new data from Dome C cover the beginning of MIS 12 to MIS 16 (black solid circles; black line is the linear fit D = 0.44 ppmv ^–1 x CO₂ – 517.75, r² = 0.57), and the period from MIS 1 to MIS 11 is covered by data from the Vostok ice core [gray solid circles (7); gray line is linear fit, D = 0.50 ppmv^–1 x CO₂ – 575.86, r² = 0.70] and Dome C Holocene and termination I [black open circles (9, 11); black dashed line is the linear fit, D = 0.50 ppmv^–1 x CO₂ – 529.87, r² = 0.84]. The offset in the D values from these two cores is due to the different distances to the open ocean, elevations, and surface temperatures of the two sites (29). [View Larger Version of this Image (170K JPEG file)]

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