Articles | Volume 14, issue 6
https://doi.org/10.5194/tc-14-2137-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-14-2137-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
| 
01 Jul 2020
Research article | Highlight paper |
| 01 Jul 2020
| 01 Jul 2020
Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology
Mathieu Plante
CORRESPONDING AUTHOR
Department of Atmospheric and Oceanic Sciences, McGill University, Montréal, Quebec, Canada
Bruno Tremblay
Department of Atmospheric and Oceanic Sciences, McGill University, Montréal, Quebec, Canada
Martin Losch
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Jean-François Lemieux
Recherche en prévision numérique environnementale, Environnement et changement climatique Canada, Dorval, Quebec, Canada
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We propose a generalized form for the damage parameterization such that super-critical stresses can return to the yield with different final sub-critical stress states. In uniaxial compression simulations, the generalization improves the orientation of sea ice fractures and reduces the growth of numerical errors. Shear and convergence deformations however remain predominant along the fractures, contrary to observations, and this calls for modification of the post-fracture viscosity formulation.
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Related subject area
Discipline: Sea ice | Subject: Rheology
Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology
Damaging viscous-plastic sea ice
Non-normal flow rules affect fracture angles in sea ice viscous–plastic rheologies
Behavior of saline ice under cyclic flexural loading
Parameter optimization in sea ice models with elastic–viscoplastic rheology
Yumeng Chen, Polly Smith, Alberto Carrassi, Ivo Pasmans, Laurent Bertino, Marc Bocquet, Tobias Sebastian Finn, Pierre Rampal, and Véronique Dansereau
EGUsphere, https://doi.org/10.5194/egusphere-2023-1809, https://doi.org/10.5194/egusphere-2023-1809, 2023
Short summary
Short summary
We explore the multivariate state and parameter estimation using data assimilation approach through idealised simulations in a dynamics-only sea ice model based on novel rheology. We identify various potential issues that can arise in complex operational sea ice model when model parameters are estimated. Even though further investigation will be needed for such complex sea ice models, we show possibilities to improve both the observed and unobserved model state forecast and parameters accuracy.
Antoine Savard and Bruno Tremblay
EGUsphere, https://doi.org/10.5194/egusphere-2023-1354, https://doi.org/10.5194/egusphere-2023-1354, 2023
Short summary
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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.
Damien Ringeisen, L. Bruno Tremblay, and Martin Losch
The Cryosphere, 15, 2873–2888, https://doi.org/10.5194/tc-15-2873-2021, https://doi.org/10.5194/tc-15-2873-2021, 2021
Short summary
Short summary
Deformations in the Arctic sea ice cover take the shape of narrow lines. High-resolution sea ice models recreate these deformation lines. Recent studies have shown that the most widely used sea ice model creates fracture lines with intersection angles larger than those observed and cannot create smaller angles. In our work, we change the way sea ice deforms post-fracture. This change allows us to understand the link between the sea ice model and intersection angles and create more acute angles.
Andrii Murdza, Erland M. Schulson, and Carl E. Renshaw
The Cryosphere, 15, 2415–2428, https://doi.org/10.5194/tc-15-2415-2021, https://doi.org/10.5194/tc-15-2415-2021, 2021
Short summary
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It has been suggested that the observed sudden breakup of Arctic and Antarctic floating ice covers may be due to fatigue failure associated with cyclic loading from ocean swells that can penetrate deeply into an ice pack. To investigate this possibility, we measured the flexural strength of saline ice after cyclic loading. Contrary to expectations, we find that the flexural strength of saline ice increases upon cycling, similar to the behavior of laboratory-grown ice and natural lake ice.
Gleb Panteleev, Max Yaremchuk, Jacob N. Stroh, Oceana P. Francis, and Richard Allard
The Cryosphere, 14, 4427–4451, https://doi.org/10.5194/tc-14-4427-2020, https://doi.org/10.5194/tc-14-4427-2020, 2020
Short summary
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In the CICE6 community model, rheology and landfast grounding/arching effects are simulated by functions of sea ice thickness and concentration with a set of fixed parameters empirically adjusted to optimize model performance. In this study we consider a spatially variable extension for representing these parameters in the two-dimensional elastic–viscoplastic (EVP) sea ice model and analyze the feasibility of the optimization of these parameters through the 4D-Var data assimilation approach.
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Short summary
We study the formation of ice arches between two islands using a model that resolves crack initiation and propagation. This model uses a damage parameter to parameterize the presence or absence of cracks in the ice. We find that the damage parameter allows for cracks to propagate in the ice but in a different orientation than predicted by theory. The results call for improvement in how stress relaxation associated with this damage is parameterized.
We study the formation of ice arches between two islands using a model that resolves crack...
