turbulent characteristics of saltation and uncertainty of saltation model parameters
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ID: 239354
2018
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Abstract
It is widely recognised that saltation is a
turbulent process, similar to other transport processes in the atmospheric
boundary layer. Due to a lack of high-frequency observations, the statistic
behaviour of saltation is so far not well understood. In this study, we use
the data from the Japan–Australia Dust Experiment (JADE) to investigate the
turbulent characteristics of saltation by analysing the probability density
function, energy spectrum and intermittency of saltation fluxes. Threshold
friction velocity, u*t, and saltation coefficient, c0, are two
important parameters in saltation models often assumed to be deterministic.
As saltation is turbulent in nature, we argue that it is more reasonable to
consider them as parameters obeying certain probability distributions. We
estimate these distributions using the JADE data. The factors contributing to
the stochasticity of u*t and c0 are
examined.
| Reference Key |
liu2018atmosphericturbulent
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|---|---|
| Authors | ;D. Liu;M. Ishizuka;M. Mikami;Y. Shao |
| Journal | Journal of agricultural and food chemistry |
| Year | 2018 |
| DOI |
10.5194/acp-18-7595-2018
|
| URL | |
| Keywords |
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