What kinds of dusty weather are there?

Sandstorm weather is divided into three types: floating dust, sand blowing and sandstorm. Generally, visibility is used to distinguish dust storms from sandstorms: sandstorms with visibility less than 1 km, sandstorms or sandstorms with visibility greater than 1 km.

We should distinguish three common weather conditions: floating dust, blowing sand and sand dust. In sandstorm weather, the atmosphere is full of fine particles, and most of the dust comes from other places, while the dust rolled up in sandstorm weather is completely generated locally. There are both floating dust and blowing sand in dusty weather, but the proportion has changed. Sandstorm can only be called sandstorm if it reaches a certain index.

Sandstorm refers to the weather phenomenon that strong winds blow up dust on the ground, making the air very turbid and the horizontal visibility less than 1km. Sandstorm is a weather phenomenon in wind erosion and desertification, and its formation is influenced by both natural factors and human activities. Natural factors include strong wind, decreased precipitation and its sand source. Human activity factor refers to the increase of sandstorm frequency after vegetation destruction in the process of economic development.

Sandstorm weather mainly occurs in winter and spring. This is because there is little precipitation in winter and spring in semi-arid and arid areas, the surface is extremely dry and loose, and the wind erosion resistance is very weak. When the wind blows, a lot of dust will be entrained in the air, forming sandstorm weather.