Datasets used to condition inversions of shear stress at the ice-bed interface on Thwaites Glacier

Abstract

Included in this handle are input data used in the inversions described in the paper "The impact of basal roughness on Thwaites Glacier sliding." These include surface elevation, and basal topographies used to construct the meshes that define the computational domain as well as the surface velocities that were used to condition the inverse problem. Swath radar technology enables three-dimensional mapping of modern glacier beds over large areas at resolutions that are higher than those typically used in ice-flow models. These data and may enable new understanding of processes at the ice-bed interface. Here, we use two densely-surveyed swath-mapped topographies (50 m^2 resolution) of Thwaites Glacier to investigate the sensitivity of inferred basal friction proxies to bed roughness magnitude and orientation. Included in this archive are the bed topographies, surface topographies and surface velocities used to infer the basal resistance of two interior regions of Thwaites Glacier.