Coupling a multi-layered snow model with a GCM

被引:32
作者
Brun, E [1 ]
Martin, E [1 ]
Spiridonov, V [1 ]
机构
[1] Meteo France, CNRM, Ctr Etud Neige, F-38406 St Martin Dheres, France
来源
ANNALS OF GLACIOLOGY, VOL 25, 1997: PAPERS FROM THE INTERNATIONAL SYMPOSIUM ON REPRESENTATION OF THE CRYOSPHERE IN CLIMATE AND HYDROLOGICAL MODELS HELD AT VICTORIA, BRITISH COLUMBIA, CANADA, 12-15 AUGUST 1996 | 1997年 / 25卷
关键词
D O I
10.3189/S0260305500013811
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A multi-layered snow model, including most physical processes governing the evolution of snowpacks, has been coupled to a global circulation model (GCM) to improve the representation of snow cover in climate simulations. The snow model (Crocus) includes original features to simulate the evolution of snowpack layering that allows a realistic calculation of snow albedo as a function of the type and size of the crystals of the surface layer. The coupling scheme is based on a synchronous run of the GCM and of the snow model with an exchange of the surface fluxes at every time-step. It was tested in a five-year run at a T42 resolution. The impact on the atmosphere was important over most snow-covered regions and the snowpacks simulated in the different regions present a layering that is realistic and very variable in connection with the climate. The simulated snow cover compares satisfactorily with the present snow climatology.
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页码:66 / 72
页数:3
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