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Equilibrium Saltation: Mass Fluxes, Aerodynamic Entrainment, and Dependence on Grain Properties

Doorschot, Judith ; Lehning, Michael

In: Boundary-Layer Meteorology, 2002, vol. 104, no. 1, p. 111-130

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    Titre
    • Equilibrium Saltation: Mass Fluxes, Aerodynamic Entrainment, and Dependence on Grain Properties
    Auteur
    • Doorschot, Judith. Swiss Federal Institute for Snow and Avalanche Research, Flüelastrasse 11, 7260, Davos Dorf, Switzerland
    • Lehning, Michael. Swiss Federal Institute for Snow and Avalanche Research, Flüelastrasse 11, 7260, Davos Dorf, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Boundary-Layer Meteorology, 2002, vol. 104, no. 1, p. 111-130. Kluwer Academic Publishers
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:319572
    Summary
    An examination is given of the way in which the saltation layer isaffected by the characteristics of the particles. Special attentionis given to the potential importance of aerodynamic entrainmentduring steady state saltation, a topic for which the discussion is still unresolved. A new numerical model for saltation in steady stateis presented, which is focused on the computation of the horizontalmass flux. The numerical computations, combined with physical arguments, suggest that aerodynamic entrainment plays a more important role thangenerally assumed so far. A comparison of the model results is made with previous models, and with measurements of snow saltation that have been reported in the literature