The Impact of Tides on Simulated Landfast Ice in a Pan-Arctic Ice-Ocean Model

International audience The impact of tides on the simulated landfast ice cover is investigated. Pan-Arctic simulations are conducted with an ice-ocean (CICE-NEMO) model with a modified rheology and a grounding scheme. The reference experiment (without tides) indicates there is an overestimation of t...

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Bibliographic Details
Published in:Journal of Geophysical Research: Oceans
Main Authors: Lemieux, Jean-François, Lei, Ji, Dupont, Frédéric, Roy, François, Losch, Martin, Lique, Camille, Laliberté, Frédéric
Other Authors: Laboratoire d'Océanographie Physique et Spatiale (LOPS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2018
Subjects:
landfast ice
tides
ice-ocean model
[SDU]Sciences of the Universe [physics]
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Arctic
Gulf of Boothia
Lancaster Sound
Prince Regent Inlet
Online Access:https://insu.hal.science/insu-03683062
https://insu.hal.science/insu-03683062/document
https://insu.hal.science/insu-03683062/file/JGR%20Oceans%20-%202018%20-%20Lemieux%20-%20The%20Impact%20of%20Tides%20on%20Simulated%20Landfast%20Ice%20in%20a%20Pan%25u2010Arctic%20Ice%25u2010Ocean%20Model.pdf
https://doi.org/10.1029/2018JC014080
Description
Summary:International audience The impact of tides on the simulated landfast ice cover is investigated. Pan-Arctic simulations are conducted with an ice-ocean (CICE-NEMO) model with a modified rheology and a grounding scheme. The reference experiment (without tides) indicates there is an overestimation of the extent of landfast ice in regions of strong tides such as the Gulf of Boothia, Prince Regent Inlet, and Lancaster Sound. The addition of tides in the simulation clearly leads to a decrease of the extent of landfast ice in some tidally active regions. This numerical experiment with tides is more in line with observations of landfast ice in all the regions studied. Thermodynamics and changes in grounding cannot explain the lower landfast ice area when tidal forcing is included. We rather demonstrate that this decrease in the landfast ice extent is dynamically driven by the increase of the ocean-ice stress due to the tides.

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