Tidal Grounding-Line Migration Modulated by Subglacial Hydrology

Katarzyna Warburton, Duncan Hewitt & Jerome Neufeld
We present a mathematical model of the hydrology of grounding-line migration on tidal timescales, in which the ice acts elastically, overlying a connected hydrological network, with the ocean tides modelled by an oscillating far-field fluid height. The upstream grounding-line migration is driven by a fluid pressure gradient through the grounding zone, while the downstream migration is limited by fluid drainage through the till. The two processes are described using separate travelling-wave solutions, based on a...
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