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- Title
Sensitivity of the Sandblasting Flux Calculations to the Soil Size Distribution Accuracy.
- Authors
Menut, Laurent; Schmechtig, Catherine; Marticorena, Béatrice
- Abstract
Atmospheric dust concentrations are very sensitive to the dust surface emissions that are mainly controlled by saltation and sandblasting processes. Thus, a correct modeling of concentrations directly depends on mass flux parameterization accuracy. In 2001, Alfaro and Gomes proposed a whole set of parameterizations linking the dust flux to surface wind speed and soil characteristics. Their formulation is based on the integration of elementary fluxes, discretized along a soil size distribution. But, because the sandblasting is a threshold process, this discretization must be as fine as possible when the threshold acts. And because this threshold depends on dynamic parameters, it is necessary to always integrate fluxes with a high resolution. This leads to large numerical simulations. In this paper it is shown that it is possible to estimate fluxes with a good accuracy by adding equations that are dedicated to better describing the sensitive parts of the emission scheme.
- Subjects
PARTICLE size determination; DUST; DUST measurement; SAND blasting; SOIL testing; PARTICLES
- Publication
Journal of Atmospheric & Oceanic Technology, 2005, Vol 22, Issue 12, p1875
- ISSN
0739-0572
- Publication type
Article
- DOI
10.1175/JTECH1825.1