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Background

Understanding the dynamics of large ice sheets (like Greenland and Antarctica) is crucial to projections of future sea level rise. The dynamics of ice sheets span a wide range of scales. There are localized regions (like grounding lines and ice streams) where very fine spatial resolution (better than 1 km) is needed to accurately resolve the dynamics. At the same time, there are large regions (much of the interior of Antarctica, for example) where such fine resolution is unnecessary and represents a waste of computational resources.  This makes it a prime candidate for adaptive mesh refinement.

Approach

The goal of the BISICLES project is to build a parallel, adaptive, high-performance ice sheet model built on Chombo. Ice is a shear-thinning non-Newtonian fluid, and is well-described by the Stokes equations. However, using the full Stokes equations is too computationally expensive, so we are using the vertically-integrated model of Schoof and Hindmarsh (2010).

 


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