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今春以来,京津一带连续发生大范围的扬沙、沙尘暴或者浮尘天气,时间之旱、频率之高、发生强度之大、影响范围之广,为建国50年来所罕见,京津一带沙尘暴天气的形成既有气候的因素,又有风沙源区植被稀疏土地沙化严重的原因。京津一带风沙源区的行政范围包括北京、天津、河北、山西、内蒙古五省(区、市)的84个县(旗、市),土地面积26万平方公里,沙化土地面积8.l万平方公里。
Since the beginning of this spring, there have been a series of sand blows, dust storms and dusty weather in a continuous area in Beijing and Tianjin. Due to the drought of time and high frequency, there is a great impact and a wide range of impacts. Since the founding of the People’s Republic 50 years ago, Forming the existing climate factors, but also the source of sandstorm areas of vegetation sparse land desertification serious reasons. The administrative areas of the sandstorm source areas in Beijing and Tianjin include 84 counties (banners and cities) in five provinces (autonomous regions and municipalities) of Beijing, Tianjin, Hebei, Shanxi and Inner Mongolia, a land area of 260,000 square kilometers and a desertified land area of 81,000 Sq km.