Extended Data Fig. 7: GIA results for selected sites.
From: Rapid glaciation and a two-step sea level plunge into the Last Glacial Maximum
Calculations, for selected far-field sites (a–f), using the ice model based on the lower-bound of RSL from GBR. GIA calculations implemented using parameters of upper-mantle viscosity and lithospheric thickness of 1020 Pa s and 70 km and lower-mantle viscosity of 1022 Pa s. However, the differences between data and calculations for the far-field sites of Tahiti (b), Bonaparte (c) and Sunda (d) indicate a better match with GIA when the higher RSL obtained from this study is used (Fig. 4) in calculating the global deglacial sea levels. The grey band represents the range of RSL predictions using GIA modelling with various earth parameters (lithospheric thickness H = 70 km, upper-mantle viscosity 1020–1021 Pa s, lower-mantle viscosity 1021–1023 Pa s), and a melting model (of ice history), which, in this case, was the MIN model. The red lines are for H = 70km, upper-mantle viscosity 2 × 1020 Pa s and lower-mantle viscosity 1022 Pa s. The blue lines show the case for H = 70 km, upper-mantle viscosity 2 × 1020 Pa s and lower-mantle viscosity 1023 Pa s. Vertical uncertainties are depth ranges for each sea level indicators and horizontal error bars are 2σ uncertainties for age estimations reported from the literature.
