  Glacial Isostatic Adjustment (GIA) caused by the melting of past ice sheets
is still a major cause of sea-level variations and 3-D crustal deformation in
the Mediterranean region. However, since the contribution of GIA cannot be
separated from those of oceanic or tectonic origin, its role can be only
assessed by numerical modelling, solving the gravitationally self-consistent
Sea Level Equation. Nonetheless, uncertainties about the melting history of the
late-Pleistocene ice sheets and the rheological profile of the Earth's mantle
affect the GIA predictions by an unknown amount. Estimating the GIA modelling
uncertainties would be particularly important in the Mediterranean region, due
to the amount of high quality geodetic data from space-borne and ground-based
observations currently available, whose interpretation demands a suitable
isostatic correction. Here we first review previous results about the effects
of GIA in the Mediterranean Sea, enlightening the variability of all the fields
affected by the persistent condition of isostatic disequilibrium. Then, for the
first time in this region, we adopt an ensemble modelling approach to better
constrain the present-day GIA contributions to sea-level rise and geodetic
variations, and their uncertainty.
