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A High-resolution Ocean and Sea-ice Modelling System for the Arctic and North Atlantic Oceans : Volume 8, Issue 5 (28/05/2015)

By Dupont, F.

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Book Id: WPLBN0003972345
Format Type: PDF Article :
File Size: Pages 18
Reproduction Date: 2015

Title: A High-resolution Ocean and Sea-ice Modelling System for the Arctic and North Atlantic Oceans : Volume 8, Issue 5 (28/05/2015)  
Author: Dupont, F.
Volume: Vol. 8, Issue 5
Language: English
Subject: Science, Geoscientific, Model
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Smith, G. C., Bourdallé-Badie, R., Lu, Y., Lemieux, J., Higginson, S., Roy, F.,...Garric, G. (2015). A High-resolution Ocean and Sea-ice Modelling System for the Arctic and North Atlantic Oceans : Volume 8, Issue 5 (28/05/2015). Retrieved from

Description: Service météorologique du Canada, Environnement Canada, Dorval, QC, Canada. As part of the CONCEPTS (Canadian Operational Network of Coupled Environmental PredicTion Systems) initiative, a high-resolution (1/12°) ice–ocean regional model is developed covering the North Atlantic and the Arctic oceans. The long-term objective is to provide Canada with short-term ice–ocean predictions and hazard warnings in ice-infested regions. To evaluate the modelling component (as opposed to the analysis – or data-assimilation – component, which is not covered in this contribution), a series of hindcasts for the period 2003–2009 is carried out, forced at the surface by the Canadian GDPS reforecasts (Smith et al., 2014). These hindcasts test how the model represents upper ocean characteristics and ice cover. Each hindcast implements a new aspect of the modelling or the ice–ocean coupling. Notably, the coupling to the multi-category ice model CICE is tested. The hindcast solutions are then assessed using a verification package under development, including in situ and satellite ice and ocean observations. The conclusions are as follows: (1) the model reproduces reasonably well the time mean, variance and skewness of sea surface height; (2) the model biases in temperature and salinity show that while the mean properties follow expectations, the Pacific Water signature in the Beaufort Sea is weaker than observed; (3) the modelled freshwater content of the Arctic agrees well with observational estimates; (4) the distribution and volume of the sea ice are shown to be improved in the latest hindcast due to modifications to the drag coefficients and to some degree to the ice thickness distribution available in CICE; (5) nonetheless, the model still overestimates the ice drift and ice thickness in the Beaufort Gyre.

A high-resolution ocean and sea-ice modelling system for the Arctic and North Atlantic oceans

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