 |
| Titel |
Simulation of wind-induced snow transport and sublimation in alpine terrain using a fully coupled snowpack/atmosphere model |
| VerfasserIn |
V. Vionnet, E. Martin, V. Masson, G. Guyomarc'h, F. Naaim-Bouvet, A. Prokop, Y. Durand, C. Lac |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1994-0416
|
| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 8, no. 2 ; Nr. 8, no. 2 (2014-03-13), S.395-415 |
| Datensatznummer |
250116076
|
| Publikation (Nr.) |
 copernicus.org/tc-8-395-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| In alpine regions, wind-induced snow transport strongly influences the
spatio-temporal evolution of the snow cover throughout the winter
season. To gain understanding on the complex processes that drive the
redistribution of snow, a new numerical model is developed. It directly couples
the detailed snowpack model Crocus with the atmospheric model
Meso-NH. Meso-NH/Crocus simulates snow transport in saltation and in
turbulent suspension and includes the sublimation of suspended snow
particles. The coupled model is evaluated against data collected around
the experimental site of Col du Lac Blanc (2720 m a.s.l.,
French Alps). First, 1-D simulations show that a detailed representation of
the first metres of the atmosphere is required to reproduce strong gradients
of blowing snow concentration and compute mass exchange between the snowpack
and the atmosphere. Secondly, 3-D simulations of a blowing snow event without
concurrent snowfall have been carried out. Results show that
the model captures the main structures of atmospheric flow in alpine
terrain. However, at 50 m grid spacing, the model reproduces only the
patterns of snow erosion and deposition at the ridge scale and misses smaller
scale patterns observed by terrestrial laser scanning. When activated, the
sublimation of suspended snow particles
causes a reduction of deposited snow mass of 5.3% over the calculation domain. Total sublimation
(surface + blowing snow) is three times higher than surface
sublimation in a simulation neglecting blowing snow sublimation. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|