The fast flow of Jakobshavn and its subglacial drainage system

31 January 2014
14:15
Mauro Werder
Abstract
Jakobshavn Isbrae and many other fast flowing outlet glaciers of present and past ice sheets lie in deep troughs which often have several overdeepened sections. To make their fast flow possible their bed needs to be slippery which in turn means high basal water pressures. I will present a model of subglacial water flow and its application to Jakobshavn. I find that, somewhat surprisingly, the reason for Jakobshavn's fast flow might be the pressure dependence of the melting point of ice. The model itself describes the unusual fluid dynamics occurring underneath the ice; it has an interesting mathematical structure that presents computational challenges.
  • Mathematical Geoscience Seminar