Modeling mineral aerosol production by wind erosion: Emission intensities and aerosol size distributions in source areas
Modeling mineral aerosol production by wind erosion: Emission intensities and aerosol size distributions in source areas
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DOI：
10.1029/2000jd900339
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发表时间：
2001-08-27
影响因子：
4.4
通讯作者：
Gomes, L
中科院分区：
文献类型：
--
作者：
Alfaro, SC;Gomes, L
将干旱地区导致矿物气溶胶释放的两个过程——跃迁和喷砂两个过程结合起来，得到了一个粉尘产生模型。根据对土壤特征和风况的描述，DPM可以计算出气溶胶的释放量及其大小分布。模型输出与文献中可用的少数现场数据的半定量比较验证了其主要含义。第一个是土壤释放小于20微米颗粒的倾向取决于(1)构成其松散部分的团聚体的干粒度分布，(2)其粗糙度长度，以及(3)风速。第二个含义是，在源区域释放的气溶胶的大小分布也强烈地依赖于这些参数。
A dust production model (DPM) is obtained by combining preexisting models of saltation and sandblasting, the two processes that lead to mineral aerosol release in arid areas. From a description of the soil characteristics and wind conditions, the DPM allows computation of the amounts of aerosol released and of their size distributions. Semiquantitative comparisons of the model outputs with the few field data available in the litterature validate its main implications. The first one is that the aptitude of a soil to release particles smaller than 20 mum depends on (1) the dry size distribution of aggregates constituting its loose fraction, (2) its roughness length, and (3) the wind velocity. The second implication is that the size distribution of aerosols released in source areas also strongly depends on these parameters.