What does sand and dust weather mean? What does sand and dust weather mean?

1. Sandstorm is a general term for sandstorm, blowing sand and floating dust weather. It is caused by strong wind blowing (rolling up) dust on the ground or being carried to downstream areas by high-altitude air currents. A phenomenon of atmospheric turbidity. According to visibility and wind speed, it can be divided into five levels: floating dust, blowing sand, sandstorm, strong sandstorm, and extremely strong sandstorm.

2. The concept of sand and dust weather: Sand and dust weather is divided into four categories: floating dust, blowing sand, sand storms and strong sand storms. Floating dust: a weather phenomenon in which dust and fine sand float evenly in the air, making horizontal visibility less than 10 kilometers; blowing sand: a weather phenomenon in which wind blows up dust and sand on the ground, making the air quite turbid, and causing horizontal visibility within 1 to 10 kilometers. ; Sandstorm: a weather phenomenon in which strong winds blow up a large amount of dust and sand on the ground, making the air very turbid, and the horizontal visibility is less than 1 km; strong sandstorm: strong winds blow up dust and sand on the ground, making the air blurry and turbid, and the horizontal visibility is less than 500 meter weather phenomena.