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Validating a dust production model by field experiment in MU US Desert, China

机译：通过在美国MU沙漠进行的田间试验验证粉尘产生模型

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Field experiments of dust production have been seldom performed in Chinese deserts that are identified as one of main dust sources in the world, and such an experiment to validate a dust production model (DPM) has not been made in China until now. Saltation flux, dust emission flux, surface features and meteorological parameters (U, Z_o, R_i, etc.) were investigated in Mu Us Desert of China to verify the DPM model and accumulate dust emission data during the spring of 2002. It indicates that observed saltation fluxes from 0.07 to 8.00 g.m~-1.s~-1 are in good agreement with the ones predicted by the DPM model when the constant of the saltation flux equation is tuned to about 2.61, which corresponds to wind friction velocities from 0.26 to 0.35 m.s~1. Unfortunately, during three local dust emission events, the observed dust fluxes are from 1 to 3 mug .m~-2os~1, lower than the modeled ones, implying that the model needs to be improved further under lower wind velocity. In comparison with data from a sandy soil with physical crust and a loam soil, saltation fluxes of the loose sandy soil in Mu Us Desert are obviously higher, which suggests that deserts and sandy land with desertification are major dust sources in northern China.
机译：在被确认为世界主要粉尘源之一的中国沙漠中，很少进行粉尘产生的现场试验，而迄今为止，在中国还没有进行过验证粉尘产生模型（DPM）的试验。通过对中国毛乌素沙漠地区的盐分通量，粉尘排放通量，地表特征和气象参数（U，Z_o，R_i等）进行了研究，以验证DPM模型并积累了2002年春季的粉尘排放数据。 0.07至8.00 gm〜-1.s〜-1的盐通量与DPM模型预测的盐通量方程的常数调整为约2.61（与风速从0.26到0.56对应）的预测值非常吻合。 0.35毫秒〜1。不幸的是，在三个局部粉尘排放事件中，观测到的粉尘通量为1至3杯.m〜-2os〜1，低于建模的通量，这意味着需要在较低风速下进一步改进该模型。与有地壳的砂质土壤和壤土的数据相比，毛乌素沙漠中疏松的沙质土壤的盐分通量明显更高，这表明沙漠和沙化的沙质土地是中国北方的主要粉尘源。

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