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SUMMARY:Fluid-mechanical models of ice-sheet sliding and dynamics - Ian He
 witt\, Mathematical Institute\, University of Oxford
DTSTART:20211029T150000Z
DTEND:20211029T160000Z
UID:TALK162700@talks.cam.ac.uk
CONTACT:Prof. Jerome Neufeld
DESCRIPTION:The volume of ice stored in glaciers and ice sheets is the pri
 mary control on Earth’s sea level\, so the question of how it responds t
 o the changing climate is of profound interest.  Fundamental to addressing
  this question is the fluid-like creep of the ice\, and the rate at which 
 it can slip over the underlying ‘bed'.  In this talk we will first discu
 ss basic models of ice-sheet volume and evolution\, and how these are coup
 led to the climate.  Secondly\, we’ll consider the detailed problem of h
 ow slip at the ice-bed interface is facilitated by the formation of water-
 filled cavities\; even after various simplifications this results in a ver
 y interesting free-boundary problem.  Finally\, we’ll look at a simplifi
 ed model for marine ice-sheet dynamics when a Coulomb-like plastic law is 
 assumed for the slip.
LOCATION:MR2\, Centre for Mathematical Sciences\, Wilberforce Road\, Cambr
 idge
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