Preprints
https://doi.org/10.5194/egusphere-2023-1354
https://doi.org/10.5194/egusphere-2023-1354
03 Aug 2023
 | 03 Aug 2023

Damaging viscous-plastic sea ice

Antoine Savard and Bruno Tremblay

Abstract. We implement a damage parametrization in the standard viscous-plastic sea ice model to disentangle its effect from model physics (visco-elastic or elasto-brittle vs. visco-plastic) on its ability to reproduce observed scaling laws of deformation. To this end, we compare scaling properties and multifractality of simulated divergence and shear strain rate (as proposed in SIREx1), with those derived from the RADARSAT Geophysical Processor System (RGPS). Results show that including a damage parametrization in the standard viscous-plastic model increases the spatial, but decreases temporal localization of simulated Linear Kinematic Features, and brings all spatial deformation rate statistics in line with observations from RGPS without the need to increase the mechanical shear strength of sea ice as recently proposed for lower resolution viscous-plastic sea ice models. In fact, including damage an healing timescale of th = 30 days and an increased mechanical strength unveil multifractal behavior that does not fit the theory. Therefore, a damage parametrization is a powerful tuning knob affecting the deformation statistics.

Antoine Savard and Bruno Tremblay

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1354', Jérôme Weiss, 12 Sep 2023
  • RC2: 'Comment on egusphere-2023-1354', Anonymous Referee #2, 25 Oct 2023
  • EC1: 'Comment on egusphere-2023-1354 by acting Editor', Daniel Feltham, 16 Nov 2023
Antoine Savard and Bruno Tremblay
Antoine Savard and Bruno Tremblay

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Latest update: 29 Feb 2024
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Short summary
We include a suitable damage parametrization in the standard viscous-plastic (VP) sea ice model to disentangle its effect from model physics (visco-elastic or elasto-brittle vs. visco-plastic) on its ability to reproduce observed scaling laws of deformation. This study shows that including a damage parametrization in the VP model improves its performance in simulating the statistical behavior of fracture patterns. Therefore, a damage parametrization is a powerful tuning knob.