Figure F15. Comparison of diatom-based summer sea-surface temperature (SSST) at Sites 1093 and 1094 with atmospheric temperature at the inversion level (Delta T sub I) of the Vostok ice core (Petit et al., 1999). The 4°C isotherm and Polar Front was displaced about 3° to the south during the climatic optimum of MIS 11 relative to today. The star indicates the fixed tie point at 390 ka (MIS 11.24) that is used in the age model for the Vostok ice core record (Petit et al., 1999). MIS = marine isotope stage (after Kunz-Pirrung et al., 2002).

Figure F15. Comparison of diatom-based summer sea-surface temperature (SSST) at Sites 1093 and 1094 with atmospheric temperature at the inversion level (

T_I) of the Vostok ice core (Petit et al., 1999). The 4°C isotherm and Polar Front was displaced about 3° to the south during the climatic optimum of MIS 11 relative to today. The star indicates the fixed tie point at 390 ka (MIS 11.24) that is used in the age model for the Vostok ice core record (Petit et al., 1999). MIS = marine isotope stage (after Kunz-Pirrung et al., 2002).