HR: 15:30h
AN: CG13B-07    [Abstracts]
TI: Application of a Coupled Multiscale Atmospheric-Land Surface Model to Simulate the Snow Circulation in a Mountain Basin
AU: * Herrera, E
EM: edgar.herrera@usask.ca
AF: University of Saskatchewan, Centre for Hydrology 117 Science Place, Saskatoon, SK S7N5C8, Canada
AU: Pomeroy, J
EM: john.pomeroy@usask.ca
AF: University of Saskatchewan, Centre for Hydrology 117 Science Place, Saskatoon, SK S7N5C8, Canada
AU: Pietroniro, A
EM: al.pietroniro@ec.gc.ca
AF: Environment Canada, National Hydrology Research Centre 11 Innovation Boulevard, Saskatoon, SK S7N3H5, Canada
AB: Snow cover spatial variability and snowmelt runoff are greatly influenced by the snow advected due to the wind- flow in the atmospheric boundary layer. Typically this has been accomplished by considering the snow as a subgrid scale problem in the atmospheric models. However, this subgrid scale approach can not be sufficient to explain the snow dynamics. Therefore a multiscale strategy where the hydrological, climatological, meteorological and physiographic conditions of a basin are related should improve the understanding of snow dynamics. This methodology was developed coupling the Global Environmental Multiscale Limited Area Model (GEM-LAM) with the Cold Regions Hydrological Model (CRHM). The GEM-LAM was used on a one-way nesting configuration to simulate the atmospheric-land fields at 100m of resolution with the Interactions between Soil, Biosphere, and Atmosphere (ISBA) soil scheme. The CRHM is used as a snow transport model at the hydrometeorological stations located in the basin. The case of study is the 4th November 2007 at Marmot Creek (50° 57' N, 115° 10' W), Alberta, Canada. This strategy has proved to be a physics based procedure to describe the snow dynamics without interpolation methods.
DE: 1839 Hydrologic scaling
DE: 1847 Modeling
DE: 3322 Land/atmosphere interactions (1218, 1631, 1843)
SC: Canadian Geophysical Union [CG]
MN: 2009 Joint Assembly