The influence of wind velocity on the size distributions of aerosols generated by the wind erosion of soils
The influence of wind velocity on the size distributions of aerosols generated by the wind erosion of soils
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DOI：
10.1029/jc079i027p04068
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发表时间：
1974-09
影响因子：
--
通讯作者：
D. Gillette;I. H. Blifford;D. Fryrear
中科院分区：
文献类型：
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作者：
D. Gillette;I. H. Blifford;D. Fryrear
通过野外观测和风洞模拟，研究了土壤风蚀气溶胶相对粒径分布与风速的关系。沉降对气溶胶颗粒影响显著的沉降速度与摩擦速度之比（（垂直动量通量/空气密度）1/2）大于0.12，小于0.68。土壤风蚀气溶胶粒径分布（2 μm < r < 10 μm）的形状随风速变化较为恒定。这一结果表明，土壤侵蚀产生气溶胶的主要机制是土壤表面的喷砂。
The relationship of the relative size distribution of soil wind erosion aerosols to wind velocity was examined in field measurements and wind tunnel simulations. The ratio of sedimentation velocity to friction velocity ((vertical momentum flux/air density)1/2) at which aerosol particles were significantly affected by settling was larger than 0.12 and smaller than 0.68. The shapes of the size distributions of soil wind erosion aerosols (2 μm < r < 10 μm) were fairly constant with wind speed. This result is evidence that the dominant mechanism of aerosol production by soil erosion is sandblasting of the soil surface.