Territorial Features of Atmospheric Environment in Beijing and Impact of Dust-storm

The territorial features of the atmospheric environment in Beijing were described in detail, and the transportation pathways of the atmosphere pollutants were found by the dot aggregation in the form of the meshwork. The concept on convergence belt of the atmosphere pollutants was given. The vertical distribution of the atmospheric pollutants in Beijing was detected by the laser techniques, showing an interrelationship between the quality of atmospheric environment in Beijing and the pollution sources in the neighboring areas of Beijing. The sand dust storms in the North China would also impact on the quality of the atmospheric environment of Beijing, so the phenomena of sand dust storm in China were studied by both satellite inspection technology and analysis of atmospheric flow fields. According to the distributions of sand dust storm sources to impact on the air environment in China, the sand dust storm sources were divided into two parts, one is the inner sources inside China, and the other is the outer sources outside China. The sand dust sources inside China were situated in the desert and Gobi in the Inner Mongolia and Xinjiang autonomous regions. The sand dust sources outside China were situated in the desert and Gobi in Russia,Hazakhstan and Mongolia. A very strong sand dust storm taken place on the 20th Mar, 2002 is given as an exa\|mple.