<  Back to the Polytechnique Montréal portal

Improving the simulation of landfast ice by combining tensile strength and a parameterization for grounded ridges

Jean-François Lemieux, Frédéric Dupont, Philippe Blain, François Roy, Gregory C. Smith and Gregory M. Flato

Article (2016)

Open Acess document in PolyPublie and at official publisher
[img]
Preview
Open Access to the full text of this document
Published Version
Terms of Use: Creative Commons Attribution Non-commercial No Derivatives
Download (1MB)
Show abstract
Hide abstract

Abstract

In some coastal regions of the Arctic Ocean, grounded ice ridges contribute to stabilizing andmaintaining a landfast ice cover. Recently, a grounding scheme representing this effect on sea ice dynamicswas introduced and tested in a viscous-plastic sea ice model. This grounding scheme, based on a basalstress parameterization, improves the simulation of landfast ice in many regions such as in the East SiberianSea, the Laptev Sea, and along the coast of Alaska. Nevertheless, in some regions like the Kara Sea, the areaof landfast ice is systematically underestimated. This indicates that another mechanism such as ice archingis at play for maintaining the ice cover fast. To address this problem, the combination of the basal stressparameterization and tensile strength is investigated using a 0.258Pan-Arctic CICE-NEMO configuration.Both uniaxial and isotropic tensile strengths notably improve the simulation of landfast ice in the Kara Seabut also in the Laptev Sea. However, the simulated landfast ice season for the Kara Sea is too short com-pared to observations. This is especially obvious for the onset of the landfast ice season which systematical-ly occurs later in the model and with a slower build up. This suggests that improvements to the sea icethermodynamics could reduce these discrepancies with the data.

Key Points - A grounding scheme is not enough to simulate landfast ice in Pan-Arctic simulations; - Both uniaxial and isotropic tensile strengths notably improve the simulation of landfast ice in deep coastal regions; - Simulated landfast ice season in the Kara Sea is still too short suggesting that thermodynamics should be improved.

Subjects: 4500 Hydrology > 4505 Glaciology
4600 Oceanography > 4600 Oceanography
Department: Department of Engineering Physics
PolyPublie URL: https://publications.polymtl.ca/4997/
Journal Title: Journal of Geophysical Research : Oceans (vol. 121, no. 10)
Publisher: AGU Publications
DOI: 10.1002/2016jc012006
Official URL: https://doi.org/10.1002/2016jc012006
Date Deposited: 19 Dec 2022 14:30
Last Modified: 06 Apr 2024 05:58
Cite in APA 7: Lemieux, J.-F., Dupont, F., Blain, P., Roy, F., Smith, G. C., & Flato, G. M. (2016). Improving the simulation of landfast ice by combining tensile strength and a parameterization for grounded ridges. Journal of Geophysical Research : Oceans, 121(10), 7354-7368. https://doi.org/10.1002/2016jc012006

Statistics

Total downloads

Downloads per month in the last year

Origin of downloads

Dimensions

Repository Staff Only

View Item View Item