今春以来 ,我国内蒙古、山西、河北和京津等北方地区接连发生１０数次大风扬尘和沙尘暴天气。沙尘暴肆虐和波及范围之广、频度之高、危害之重是历史上罕见的。受沙尘暴影响较重的北京等地区 ,大气能见度降至１公里以下 ,局部地区能见度不足百米 ;徐州、济南、内蒙古、河北、山? Since the beginning of this spring, there have been 10 times of gale dust and sandstorms in northern China, including Inner Mongolia, Shanxi, Hebei, and Beijing and Tianjin. Sandstorms are rampant and spread to a wide range of high frequency, endangering the weight of rare in history. In Beijing and other regions heavily affected by sandstorms, the visibility of the atmosphere dropped below 1 km and the visibility in some areas was less than 100 meters. Xuzhou, Jinan, Inner Mongolia, Hebei,