but gravity measurements of ice-mass loss are  complicated by glacial isostatic adjustments—compensation for the rise or fall of the underlying crustal material.
but gravity measurements of ice-mass loss are  complicated by glacial isostatic adjustments—compensation for the rise or fall of the underlying crustal material.
post-glacial rebound:5
the enormous weight of this ice caused the surface of the earth's crust to deform and warp downward, forcing the viscoelastic mantle material to flow away from the loaded region.