Gia Grace -

The GRACE satellites detect gravity changes, but they cannot distinguish between mass changes on the surface (like melting glaciers) and mass changes deep inside the Earth (like the solid ground rising due to GIA).

To accurately measure current ice loss in Antarctica or Greenland, scientists must subtract the GIA signal from the total gravity signal measured by GRACE.

GIA-corrected GRACE data helps determine that land-to-ocean freshwater exchange has contributed roughly 1.2 mm per year to global sea level rise. gia grace

The ongoing "rebound" or visco-elastic response of the solid Earth to the removal of massive ice sheets from the last Ice Age.

Models rely on assumptions about the Earth's internal viscosity. Changes in these parameters can significantly alter model fit and predictions for regions like Alaska. The GRACE satellites detect gravity changes, but they

Global median relative uncertainty in GIA gravity rates is estimated at roughly 44%, driven by limitations in our knowledge of ice history and Earth's rheology.

Twin satellite missions that measure changes in Earth's gravity field over time. These changes indicate how mass—mostly water and ice—moves around the planet. 2. Why GIA is Vital to GRACE Data The ongoing "rebound" or visco-elastic response of the

GIA corrections are used to isolate "wetting" and "drying" trends in regional water storage, particularly in previously ice-covered regions like Canada .