浑善达克沙地气候因子对沙尘暴频率影响作用的模拟研究

 利用浑善达克沙地气象台站的常规气候资料,分析了气候要素和沙尘暴频率的多年变化状况,建立了能够很好描述区域沙尘暴频率年际变化的沙尘暴指数,并建立了适合浑善达克沙地气候特征的气候因子影响沙尘暴频率指数模型。结果表明,浑善达克沙地自1960年后气候逐渐变暖,并有微弱变湿趋势,沙尘暴年日数自1994年起波动增加,2000年出现极大值;沙尘暴年日数与沙尘暴指数的相关系数达0.7左右;建立的气候影响指数模型,能够用来解释当前浑善达克沙地沙尘暴频率的分布格局。

Simulation on Effect of Climate Factors on Sandstorm Frequency in Hunshandake Sandland

Meteorological records of many years in the Hunshandake Sandland were used to analyze the changes of climate factors and sandstorm frequency. In this paper, an index model quantitatively simulating the effect of climate factors on sandstorm frequency was established, by which the effect in the Hunshandake Sandland was studied. Research results showed that the climate in the Hunshandake Sandland became warmer gradually since 1960, with an unobvious wetting trend; the sandstorm days wavily increased since 1994, and reached the biggest in 2000; the correlation coefficient between sandstorm index and annual sandstorm days was about 0\^7. It was proved that the established index model could be used to well-explain the distribution pattern of sandstorm frequency in the study region.