Abstract
Abstract. It is increasingly recognized that atmospheric-boundary-layer
stability (ABLS) plays an important role in eolian processes. While the
effects of ABLS on particle emission have attracted much attention and been
investigated in several studies, those on particle deposition have so far
been less well studied. By means of large-eddy simulation, we investigate how
ABLS influences the probability distribution of surface shear stress and
hence particle deposition. Statistical analysis of the model results reveals
that the shear stress can be well approximated using a Weibull
distribution, and the ABLS influences on particle deposition can be estimated
by considering the shear stress fluctuations. The model-simulated particle
depositions are compared with the predictions of a particle-deposition
scheme and measurements, and the findings are then used to improve the
particle-deposition scheme. This research represents a further step towards
developing deposition schemes that account for the stochastic nature of
particle processes.
Funder
China Scholarship Council
Fundamental Research Funds for the Central Universities
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