![]() ![]() The inversion is based on a steady-state linear perturbation analysis of the shallow-ice-stream equations. the degree of basal slip for a given level of drag). Here we present the results of a new inversion of surface-elevation and velocity data over Thwaites Glacier, West Antarctica, for bed topography and slipperiness (i.e. However, these direct observations are not spaced closely enough to meet the requirements of ice-sheet models, so interpolation and inversion methods are used to fill in the gaps. ![]() Most of our detailed knowledge of bed topography comes from airborne and ground-penetrating radar observations. Limited knowledge of the topography and rheology of ice-bed interface is a key cause of this uncertainty, as models show that small changes in the bed can have a large influence on predicted rates of ice loss. ![]() There is significant uncertainty over how ice sheets and glaciers will respond to rising global temperatures. ![]()
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March 2023
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