Simplification of a dust emission scheme and comparison with data
Simplification of a dust emission scheme and comparison with data
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DOI：
10.1029/2003jd004372
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发表时间：
2004-05
影响因子：
--
通讯作者：
Y. Shao
中科院分区：
文献类型：
--
作者：
Y. Shao
[1] 提出了一种沙尘排放方案的简化形式，该方案考虑了跃移冲击和团聚体分解。该方案的表述为：沙尘排放与顺风向跃移通量成正比，但比例关系取决于土壤质地和土壤塑性压力p。对于较小的p值（松散土壤），沙尘排放率与u*⁴成正比（u*为摩擦速度），但一般情况下不一定如此。利用该方案所做的沙尘排放预测与文献中公布的几组数据进行了比较。通过比较能够对各种土壤的一个模型参数和土壤塑性压力进行估算。虽然还需要更多数据进行进一步验证，但推荐了一个选择模型参数的通用准则。
[1] A simplification of a dust emission scheme is proposed, which takes into account of saltation bombardment and aggregates disintegration. The statement of the scheme is that dust emission is proportional to streamwise saltation flux, but the proportionality depends on soil texture and soil plastic pressure p. For small p values (loose soils), dust emission rate is proportional to u*4 (u* is friction velocity) but not necessarily so in general. The dust emission predictions using the scheme are compared with several data sets published in the literature. The comparison enables the estimate of a model parameter and soil plastic pressure for various soils. While more data are needed for further verification, a general guideline for choosing model parameters is recommended.