A new glacial isostatic adjustment model for Antarctica: calibrated and tested using observations of relative sea-level change and present-day uplift rates
We present a glacial isostatic adjustment (GIA) model for Antarctica. This is driven by a new
deglaciation history that has been developed using a numerical ice-sheet model, and is
constrained to fit observations of past ice extent. We test the sensitivity of the GIA model to
uncertainties in the deglaciation history, and seek earth model parameters that minimize the
misfit of model predictions to relative sea-level observations from Antarctica. We find that the
relative sea-level predictions are fairly insensitive to changes in lithospheric thickness and …
deglaciation history that has been developed using a numerical ice-sheet model, and is
constrained to fit observations of past ice extent. We test the sensitivity of the GIA model to
uncertainties in the deglaciation history, and seek earth model parameters that minimize the
misfit of model predictions to relative sea-level observations from Antarctica. We find that the
relative sea-level predictions are fairly insensitive to changes in lithospheric thickness and …
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