近50年来中国沙尘暴变化趋势分析

Research on change of dust stormin China in recent 50 years

综述了关于我国沙尘暴时空分布规律的研究进展,利用117个沙尘暴代表站近50年来的气象观测数据,以沙尘暴出现日数为定量指标,采用相关分析的方法,对我国沙尘暴的变化趋势进行了分析,并针对中国北方的草原区、荒漠区和农业区,进行了变化趋势分析。结果表明近50年来,我国北方沙尘暴天气总体呈下降趋势,沙尘暴发生频率与下垫面状况有着很好的对应关系,同时,沙尘暴有着明显的年代级变化规律。

This paper firstly reviews the advance in the research on spatial-temporal variability of dust storms in ~China and then based on the ground observation data of 117 stations in 50 years and using dust storm days as the index, the change of dust storms is analyzed by the correlation analysis. In addition, the paper does some research on the change of the grassland, desert, and agricultural area in northern China. The results shows that: in recent 50 years, the dust storm weather deceased as a whole, and the frequency of dust storm has a very correlative relationship with the ground condition, meanwhile, the dust storms has obvious inter-decade change in last 50 years.