【摘要】 对内蒙古地区土壤水分和沙尘天气季节和年际的变化特点进行了分析,发现沙尘天气和土壤水分基本遵循着共同的变化规律。年际间,土壤水分含量和沙尘天气次数的差异均较大,但季节变化都以一年为周期进行波动。0～20cm土壤相对湿度的大小,对沙尘天气的形成有着重要影响,土壤相对湿度越大,沙尘天气越难以形成,但当相对湿度≤40%时,地表疏松干燥,为沙尘天气的形成提供了最有利的下垫面条件。更多还原

【Abstract】 This article has analyzed change characteristic of soil moisture and the sand dust weather season in Inner Mongolian area.The results showed that the sand dust weather and the soil moisture basically is following the common changerule.Influence of 0?20 cm soil relative humidity was the important to the sand dust weather formation.The soil relatively wet was more;the sand dust weather is more difficult to form.When relative humidity ≤40%,the soil surface is dry,it has provided the most advantageous for the sand dust weather formation.更多还原