Snow and sea ice thermodynamics in the Arctic: Model validation and sensitivity study against SHEBA data

Evolution of the Arctic sea ice and its snow cover during the SHEBA year were simulated by applying a high-resolution thermodynamics snow/ice model (HIGHTSI). Attention was paid to the impact of albedo on snow and sea ice mass balance, effect of snow on total ice mass balance, and the model vertical...

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Bibliographic Details
Main Authors: Bin, Cheng, Vihma, Timo, Zhanhai, Zhang, Zhijun, Li, Huiding, Wu
Format: Article in Journal/Newspaper
Language:English
Published: Polar Research Institute of China - PRIC 2008
Subjects:
Cryosphere
Oceans
Arctic
Advances in Polar Science
albedo
Polar Science
Sea ice
Online Access:http://library.arcticportal.org/2353/
http://library.arcticportal.org/2353/1/A200802003.pdf
Description
Summary:Evolution of the Arctic sea ice and its snow cover during the SHEBA year were simulated by applying a high-resolution thermodynamics snow/ice model (HIGHTSI). Attention was paid to the impact of albedo on snow and sea ice mass balance, effect of snow on total ice mass balance, and the model vertical resolution. The SHEBA annual simulation was made applying the best possible external forcing data set created by the Sea Ice Model Intercomparison Project. The HIGHTSI control run reasonably reproduced the observed snow and ice thickness. A number of albedo schemes were incorporated into HIGHTSI to study the feedback processes between the albedo and snow and ice thickness. The snow thickness turned out to be an essential variable in the albedo parameterization. Albedo schemes dependent on the surface temperature were liable to excessive positive feedback effects generated by errors in the modelled surface temperature. The superimposed ice formation should be taken into account for the annual Arctic sea ice mass balance.

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