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CATEGORIES:Fluid Mechanics (DAMTP)
SUMMARY:Fluid-mechanical models of ice-sheet sliding and d
 ynamics - Ian Hewitt\, Mathematical Institute\, Un
 iversity of Oxford
DTSTART;TZID=Europe/London:20211029T160000
DTEND;TZID=Europe/London:20211029T170000
UID:TALK162700AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/162700
DESCRIPTION:The volume of ice stored in glaciers and ice sheet
 s is the primary control on Earth’s sea level\, so
  the question of how it responds to the changing c
 limate is of profound interest.  Fundamental to ad
 dressing this question is the fluid-like creep of 
 the ice\, and the rate at which it can slip over t
 he underlying ‘bed'.  In this talk we will first d
 iscuss basic models of ice-sheet volume and evolut
 ion\, and how these are coupled to the climate.  S
 econdly\, 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 aft
 er various simplifications this results in a very 
 interesting free-boundary problem.  Finally\, we’l
 l look at a simplified model for marine ice-sheet 
 dynamics when a Coulomb-like plastic law is assume
 d for the slip.
LOCATION:MR2\, Centre for Mathematical Sciences\, Wilberfor
 ce Road\, Cambridge
CONTACT:Prof. Jerome Neufeld
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