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首页> 外文期刊>SOLA: Scientific Online Letters on the Atmosphere >The Effects of Snow Cover and Soil Moisture on Asian Dust: I. A Numerical Sensitivity Study
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The Effects of Snow Cover and Soil Moisture on Asian Dust: I. A Numerical Sensitivity Study

机译：积雪和土壤水分对亚洲沙尘的影响：I。数值敏感性研究

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References(13) Cited-By(2) Supplementary materials(2) Semi-arid regions of East Asian dust source areas are frequently covered by snow. We conducted a sensitivity study of East Asian dust storms to investigate the effects of snow cover and soil moisture with a global aerosol model (MASINGAR). The simulated dust concentration greatly underestimated the dust event in late March 2007 relative to the observed PM10 concentration. When the effect of soil moisture is not taken into consideration, the simulated total dust emission amount is almost doubled, and the simulated dust concentration is comparable or overestimated with regard to the PM10 observations. The result of the sensitivity study suggests that the underestimation of the dust event is due to excessive soil moisture, which suppresses the dust emission. In contrast, the simulated dust concentration of the control experiment is in agreement with the observed PM10 concentration in May, suggesting that the effects of snow cover and soil moisture on the dust event in May were very small. To improve our ability to forecast Asian dust events in March, the treatment of the hydrological cycles of snow in the land surface model and the soil moisture dependence of dust emission flux should be regarded as the key factors.
机译：参考文献（13）被引用的文献（2）补充材料（2）东亚尘埃源地区的半干旱地区经常被雪覆盖。我们对东亚沙尘暴进行了敏感性研究，以全球气溶胶模型（MASINGAR）研究积雪和土壤水分的影响。相对于观测到的PM10浓度，模拟的粉尘浓度大大低估了2007年3月下旬的粉尘事件。当不考虑土壤水分的影响时，模拟的总粉尘排放量几乎翻倍，并且与PM10观测值相比，模拟的粉尘浓度是可比的或被高估了。敏感性研究的结果表明，尘埃事件的低估是由于土壤水分过多，从而抑制了粉尘的排放。相比之下，对照实验的模拟粉尘浓度与5月份观察到的PM10浓度相吻合，表明积雪和土壤水分对5月份粉尘事件的影响很小。为了提高我们对3月亚洲尘埃事件的预报能力，应对陆面模型中积雪的水文循环处理和粉尘排放通量对土壤水分的依赖性应作为关键因素。

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