the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Damaging viscous-plastic sea ice
Antoine Savard
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.
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Antoine Savard and Bruno Tremblay
Status: open (until 08 Nov 2023)
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RC1: 'Comment on egusphere-2023-1354', Jérôme Weiss, 12 Sep 2023
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The comment was uploaded in the form of a supplement: https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1354/egusphere-2023-1354-RC1-supplement.pdf
Antoine Savard and Bruno Tremblay
Antoine Savard and Bruno Tremblay
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