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| Titel |
Simulation of the blowing snow flux in Adélie Land, Antarctica, by a regional climate model |
| VerfasserIn |
Hubert Gallée, Charles Amory, Cecile Agosta |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250133055
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| Publikation (Nr.) |
 EGU/EGU2016-13625.pdf |
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| Zusammenfassung |
| The parameterization of blowing snow in the regional climate model MAR (Modèle Atmosphérique Régional) has been tested.
The model is set-up over Adélie Land, Antarctica, with a fine horizontal resolution (5 km) and an improved vertical resolution near the surface (lowest level is now situated 0.15 m above the surface). The domain of the model covers the steepest slopes of Adélie Land, on an area of 500 times 500 km2. Simulations last 2 summer months (December 2010 and January 2011).
The influence of model parameterizations on the simulated wind speed, relative humidity and horizontal blowing snow flux near the surface is assessed. It is found that model parameters influencing turbulence and in particular the parameterization of the roughness length are the main contributors to the sensitivity of the above-mentioned model variables. Therefore model sensitivity tests to various parameterizations of the roughness length are performed, allowing to define a new parameterization of the roughness length depending on snow erosion by the wind. |
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