毛乌素沙地气候因素对沙尘暴频率影响作用的模拟研究

Simulating the effect of climate on the dust storm frequency in Mu Us Sandland, north China

沙尘暴是一种强烈的风蚀输沙形式 ,是造成流沙蔓延和土地沙化最重要、最直接的作用过程之一。借鉴国际上最新的研究进展 ,建立了适合毛乌素沙地气候特征的定量模型 ,比较深入地考察了毛乌素沙地的气候因素对沙尘暴频率的影响作用 ,利用沙地位于不同方位的 6个气象台站多年气候记录资料 ,分别计算了各月气候对沙尘暴频率的影响作用指数 ,分别对 6个气象台站各月沙尘暴频率进行回归 ,并利用气候影响指数对沙尘暴频率进行了拟合 。

Dust storm is a kind of serious wind erosion and one of the most important and direct processes of sand removal in arid and semi\|arid regions. In the present paper, a quantitative model simulating the effect of climate on dust storm frequency was presented and the climatic effect on dust storm frequency in Mu Us Sandland was studied. Meteorological records of many years in six meteorological stations were applied to evaluate the climatic influential index and to simulate the actual dust storm frequency.