【摘要】 为了更好地认识我国的强沙尘暴，对中、美和苏丹三地的强沙尘暴个例进行了对比分析，讨论了它们之间的异同，强调了我国西北的强沙尘暴也存在干飑线对流特征和雷暴下曳气流的作用更多还原

【Abstract】 In order to better know severe dust devil in China,contrast analysis for its cases has been developed in China,America and Sudan.Its similarities and dissimilarities have been discussed.It has been proved again that severe dust devil has convection feature of dry squall line and function of thunderstorm downdraught in the Northwest China.更多还原