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SUMMARY:Damaging viscous-plastic sea ice - Antoine Savard (McGill Universi
 ty)
DTSTART:20220921T130000Z
DTEND:20220921T133000Z
UID:TALK178283@talks.cam.ac.uk
DESCRIPTION:We implement a damage parametrization in the standard viscous-
 plastic sea ice model to disentangle the effect of rheology (elasto-brittl
 e vs visco-plastic) from the damage parametrization in their abilities to 
 reproduce observed scaling laws of deformation. To this end\, we test the 
 sensitivity of the VP sea ice model to the inclusion of damage and compare
  the resulting deformation fields to those from the RADARSAT Geophysical P
 rocessor System (RGPS) using the metrics proposed in SIREx\, i.e. scaling 
 properties\, and multifractality of divergence and shear strain rate. Resu
 lts show that the inclusion of a damage parametrization inside the standar
 d viscous-plastic model brings all spatial deformation rate statistics\, e
 xcept temporal scaling\, in line with observations from RGPS without the n
 eed to modify the mechanical strength (yield curve) of sea ice. Adding a d
 amage parametrization to the standard VP model proves to be a powerful low
 -cost knob to adjust the deformation statistics of viscous-plastic sea ice
  models.
LOCATION:Seminar Room 1\, Newton Institute
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