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SUMMARY:Marine terminating glaciers within Elmer/Ice: model and applicatio
 ns - Olivier Gagliardini (Laboratoire de glaciologie et géophysique de l
 ’environnement)
DTSTART:20150319T163000Z
DTEND:20150319T173000Z
UID:TALK57465@talks.cam.ac.uk
CONTACT:Poul Christoffersen
DESCRIPTION:Over the last two decades\, new observing systems have shown t
 hat the Greenland and Antarctic ice sheets have contributed 20% of the glo
 bal sea level rise (SLR). Ice sheets impact sea level through variations o
 f their surface mass balance and their ice discharge. For Antarctica\, no 
 trend in snow accumulation has been identified for the entire Antarctic ic
 e sheet over the recent decades. In contrast\, a number of outlet glaciers
  have continuously accelerated\, particularly in Western Antarctica. A con
 sensus has emerged on the role of the ocean as a driver of the observed ac
 celeration: marine melt underneath the ice shelves drives changes in ice d
 ynamics by decreasing the buttressing. Upon a retreat has been initiated\,
  the bedrock configuration plays also a key role in controlling the rate a
 nd extend of the grounding line retreat.  \n\nPrediction of the dynamical 
 contribution to SLR of ice-sheets require the development of ice flow mode
 ls capable to account for these various processes. In this presentation\, 
 I will make an overview of the modelling effort performed these last years
  using the ice-sheet / ice flow finite element model Elmer/Ice. I will foc
 us on the grounding line dynamics and associated processes: basal melting 
 below the ice-shelf\, basal friction\, calving. I will present the process
 es already included in Elmer/Ice and the corresponding applications. I wil
 l then present the missing processes that should be implemented in the nea
 r future developments. 
LOCATION:Scott Polar Research Institute\, main lecture theatre
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