Fig. 3: Comparison of core GC1407 records to regional palaeoclimate records.
From: Multiple episodes of ice loss from the Wilkes Subglacial Basin during the Last Interglacial
a Antarctic ice-core temperature difference (ΔT, difference from mean values of the last millennium) derived from deuterium isotopes at EPICA Dome C (EDC)39 plotted on the AICC2012 age scale (grey line). b Southern Ocean bottom water temperature (BWT) from benthic foraminiferal Mg/Ca ratios at Ocean Drilling Program (ODP) Site 1123 (orange triangles)49. c Southern Ocean sea surface temperature (SST) from diatom assemblages in core DCR-1PC (pink triangles)50. d Authigenic 10Be/9Be ratios from core GC1407 (red squares, this study) (error bars are 1 s.d.). e Detrital sediment Nd isotopes (εNd) from core GC1407 (dark blue diamonds, this study) (error bars are 2 s.d.). f Iceberg rafted debris (IBRD, percent 250 µm–2 mm) from core GC1407 (green circles, this study). Yellow bars indicate two episodes of inferred Wilkes Subglacial Basin ice mass loss during the early and late Last Interglacial.
