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Abstract

SeaThe contribution to sea-level rise from shrinking glaciers and ice sheets is increasing. Observed acceleration in the contribution rate of ice loss from the Greenland and Antarctica Antarctic ice sheets is a concern, particularly for West Antarctica where the ice sheet’s geometric configuration is unstable to small perturbations.ProSPect addresses the limitations of the the West Antarctic Ice Sheet, which is largely grounded below sea level. This geometric configuration makes Antarctica susceptible to a dynamic instability that could result in a catastrophic collapse of one or more ice shelves as a result of relatively small perturbations at the ice sheet's margins. While ice sheet models have become significantly more advanced over the past decade, they are still incomplete in many ways; hence, there are large uncertainties in these models' projections of future sea-level rise. The goal of the ProSPect SciDAC partnership is to address current limitations of DOE ice sheet and Earth system models that prevent limit their use for making accurate sea-level projections. Focus areas include (1) missing or inadequate model physics, (2) missing ISM and ESM coupling, (3) coupled ISM and ESM initialization methods, and (4) probabilistic sea-level projections.In this poster we present recent developments of the ice sheet models These include inadequate or missing model physics, incomplete couplings between models, and deficiencies in methods for model initialization, validation, and uncertainty quantification. This poster focuses on recent ProSPect efforts towards ice sheet model development to incorporate missing physics (ice - damage, fracture and calving, subglacial hydrology, enthalpy) and to improve the model efficiency (overall computational efficiency and portability of the models (through the incorporation of adaptive mesh refinement, solver scalable and efficient solvers preconditioners and performance portabilityportable kernels).