Sensitivity of Modeled Elastic Deformation in the Amundsen Sea Embayment | CU Experts

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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