Snow/atmosphere coupled simulation at Dome C, Antarctica

Authors: Brun, Eric; Six, Delphine; Picard, Ghislain; Vionnet, Vincent; Arnaud, Laurent; Bazile, Eric; Boone, Aaron; Bouchard, Aurélie; Genthon, Christophe; Guidard, Vincent; Le Moigne, Patrick; Rabier, Florence; Seity, Yann

Source: Journal of Glaciology, Volume 57, Number 204, September 2011 , pp. 721-736(16)

Publisher: International Glaciological Society

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Abstract:

Using a snow/atmosphere coupled model, the evolution of the surface and near-surface snow temperature is modeled at Dome C, Antarctica, during the period 20–30 January 2010. Firstly, the detailed multilayer snow model Crocus is run in stand-alone mode, with meteorological input forcing data provided by local meteorological observations. The snow model is able to simulate the evolution of surface temperature with good accuracy. It reproduces the observed downward propagation of the diurnal heatwave into the upper 50 cm of the snowpack reasonably well. Secondly, a fully coupled 3-D snow/atmosphere simulation is performed with the AROME regional meteorological model, for which the standard single-layer snow parameterization is replaced by Crocus. In spite of a poor simulation of clouds, the surface and near-surface snow temperatures are correctly simulated, showing neither significant bias nor drifts during the simulation period. The model reproduces particularly well the average decrease of the diurnal amplitude of air temperature from the surface to the top of the 45 m instrumented tower. This study highlights the potential of snow/atmosphere coupled models over the Antarctic plateau and the need to improve cloud microphysics and data assimilation over polar regions.

Document Type: Research Article

DOI: http://dx.doi.org/10.3189/002214311797409794

Publication date: September 1, 2011

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  • The Journal of Glaciology is published six times per year. It accepts submissions from any discipline related to the study of snow and ice. All articles are peer reviewed. The Journal is included in the ISI Science Citation Index.
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