What are the reasons for frequent sandstorms in Beijing? 、

1. Sandstorm is a collection of sandstorms and sandstorms, which refers to a serious sandstorm phenomenon in which strong winds blow up a lot of dust on the ground and drag it into the air, making the air turbid and the visibility less than 1000 meters. The driving force of sandstorm is wind, and the material basis is sand dust. Wind and dust have complex and diverse temporal and spatial changes. The wind is strong enough and there is enough dust.

Second, in spring and autumn, the confrontation between cold and warm air in Beijing is more obvious. Before the arrival of cold air, the temperature is higher, the air pressure is lower, the cyclone develops more vigorously, and the pressure gradient between cyclone and cold high pressure will be great. Therefore, Beijing is prone to windy weather in spring and autumn, and the big pressure gradient is the fundamental reason for the strong wind. The air pressure changes sharply in a short distance, and the wind will be very strong. Drought is also one of the main causes of sandstorms. The rainfall in some areas of Beijing is weak and uneven, and the dust suppression effect is not obvious. Therefore, the distribution of dust sources and favorable air instability conditions are the main reasons for the formation of dust storms in Beijing.

Third, how to prevent sandstorms.

1, strengthen environmental protection and strengthen people's awareness of environmental protection;

2. Restore vegetation, strengthen biological protection system and prevent sandstorms;

3. Strengthen the engineering and technical measures to prevent sandstorms, that is, the structure of houses and buildings;

4. Strengthen agricultural technical measures;

5. Strengthen forecasting and early warning.