Development of a New Wind-Blown-Dust Emission Module Using Comparative Assessment of Existing Dust Models

作者：Park Young Kwon; Park Sung Hoon^*

来源：Particulate Science and Technology, 2010, 28(3): 267-286.

DOI：10.1080/02726351.2010.491761

• assessment
• dust storm
• modeling
• parameterization
• wind-blown dust
• wind erosion

A new wind-blown dust emission module has been fabricated to be used in investigating the development and transport of Asian dust storms. A number of different dust emission models currently used worldwide were critically compared to collect the state-of-the-art schemes for each parameterization step of the wind erosion process. Thorough assessment of the dust models were conducted with an aid of literature review to judge the advantages and drawbacks of each model. The threshold friction velocity for smooth dry surface, the drag partitioning effect by non-erodible surface roughness elements, the soil moisture effect, the positive feedback of the saltating soil particles to the friction velocity, the saltation scheme calculating the horizontal soil flux, and the sandblasting scheme calculating the vertical dust emission flux were considered. A new wind-blown dust emission model was developed using the best components determined based on the analyses of this study. The predictions of the size-resolved wind-blown dust emission by different models were compared for the first time with a field measurement available in the literature. The new model developed in this study showed a reasonably good agreement with the measurement (agreement index of 0.91).

• 出版日期2010