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The Cryosphere An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/tc-2017-197
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
10 Oct 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal The Cryosphere (TC).
Thermodynamic and Dynamic Ice Thickness Changes in the Canadian Arctic Archipelago in NEMO-LIM2 Numerical Simulations
Xianmin Hu1, Jingfan Sun1,a, Ting On Chan1,b, and Paul G. Myers1 1Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, T6G 2E3, Canada
asummer intern from Zhejiang University, 38 Zheda Road, Hang zhou, China, 310027
bnow at: Skytech Solutions Ltd., Canada
Abstract. Sea ice thickness evolution within the Canadian Arctic Archipelago (CAA) is of great interest. In this study, based on the NEMO numerical frame work including the LIM2 sea ice module, simulations at both 1/4° and 1/12° horizontal resolution were conducted from 2002 to 2016. The model captures well the general spatial distribution of ice thickness in the CAA region, with very thick sea ice (∼&rthinsp;4 m and thicker) in the northern CAA, thick sea ice (2.5 m to 3 m) in the west-central Parry Channel and M'Clintock Channel, and thin (< 2 m) ice (in winter months) on the east side of CAA (e.g., eastern Parry Channel, Baffin Islands coast) and water channels in southern areas. Even though the configurations still have resolution limitations in resolving the exact observation sites, simulated ice thickness compares well with weekly Environment and Climate Change Canada (ECCC) New Icethickness Program data at nearby sites except in the north. At 1/4° to 1/12° scale, model resolution does not play a significant role in the sea ice simulation except to improve local dynamics because of better coastline representation. Sea ice growth is decomposed into thermodynamic and dynamic (including all non-thermodynamic processes in the model) contributions to study the ice thickness evolution. Relatively smaller thermodynamic contribution to ice growth between December and the following April is found in the thick and very thick ice regions, with larger contributions in the thin ice covered region. Wavelet analysis of the hourly simulated ice fields clearly shows the thermodynamic contribution have seasonal and diurnal cycles while only the seasonal cycle is significant for the total ice thickness. High frequency changes are found in both fields during the sea ice melting and formation process, particularly in the melting season.

Citation: Hu, X., Sun, J., Chan, T. O., and Myers, P. G.: Thermodynamic and Dynamic Ice Thickness Changes in the Canadian Arctic Archipelago in NEMO-LIM2 Numerical Simulations, The Cryosphere Discuss., https://doi.org/10.5194/tc-2017-197, in review, 2017.
Xianmin Hu et al.
Xianmin Hu et al.
Xianmin Hu et al.

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Short summary
We evaluated the sea ice thickness simulation in the Canadian Arctic Archipelago region using 1/4 and 1/12 degree NEMO LIM2 configurations. Model resolution dose not play a significant role at the studies scale. Relatively smaller thermodynamic contribution in the winter season is found in the thick ice covered areas, with larger contributions in the thin ice covered regions. High frequency signals in ice growth, particularly during ice melting and freeze-up periods, are studied with wavelet.
We evaluated the sea ice thickness simulation in the Canadian Arctic Archipelago region using...
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