近年来,我国北方地区沙尘暴灾害较前些年增多,影响范围扩大,危害程度也大为增强。今年3月18～21日,内蒙古、甘肃中部、宁夏北部、河北北部、北京、吉林西北部等地出现了强沙尘暴和沙尘天气,其中甘肃鼎新、内蒙古乌拉特后旗能见度曾经为零。沙尘暴天气的频繁发生,引起政府和公众的高度重 In recent years, the dust storm disasters in northern China have increased over the previous years, the scope of influence has been expanded, and the degree of damage has also been greatly enhanced. From March 18 to 21 this year, strong dust storms and sandstorms occurred in Inner Mongolia, central Gansu, northern Ningxia, northern Hebei, Beijing, and northwestern Jilin. Among them, Gansu Dingxin and Inner Mongolia’s Wulatehouqi had zero visibility. The frequent occurrence of sandstorms caused a high degree of heavy government and public