| Summary: | This study investigates the effects of using high resolution surface load change grids when modeling elastic crusted deformation at ANET-POLENET Global Navigation Satellite System (GNSS) sites in the Amundsen Sea Embayment (ASE), Antarctica. We create sub-kilometer resolution surface change grids from 1143 digital elevation models (DEMs) derived from stereo optical imagery. We model elastic deformation at grid resolutions between 0.32 and 6 km. We find that grid resolutions of 6 km are appropriate to characterize elastic deformation at the ANET-POLENET sites within the ASE, as each GNSS site is more than 5 km from sites of major mass loss. Our experiments reveal that for localities where major mass change is occur within 5 km, such as at grounding zones and shear margins, the effects of surface load grid resolution within elastic models may be large and finer scale resolutions (less than 0.32 km) should be used.
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