The Central Meteorological Observatory continued to issue a blue warning of sandstorms. What is the cause of sandstorm?

Sandstorms have turned the sky yellow in some parts of the north these days. After a period of time, the Central Meteorological Observatory continued to issue a blue warning of sandstorms. It seems that this kind of weather will continue. So why are there sandstorms?

What is a sandstorm? Sandstorm refers to a large amount of dust rolled up from the ground by strong winds, making the horizontal visibility less than 1 km, in which sandstorm refers to a sand-laden storm formed by strong winds blowing a large amount of dust near the ground; Sandstorm is a disastrous weather phenomenon, which is formed by strong winds bringing a lot of dust and other fine particles into the sky.

The causes of sandstorms are strong winds, strong thermal instability and sand sources. Strong wind is the driving force of sandstorm, and the source of sandstorm is the material basis of sandstorm. Unstable thermal conditions are conducive to the increase of wind power and the development of strong convection, thus carrying more dust.

The causes of sandstorms are not only natural factors, environmental factors, climate factors, but also human factors.

Generally, sandstorm weather is divided into five types: floating dust, sand blowing, sandstorm, strong sandstorm and extra-strong sandstorm. At present, the northern part of China is experiencing a three-level sandstorm. Sandstorm will cause environmental pollution, affect traffic safety and endanger human health.

How to treat sandstorms? We can strengthen the biological protection system against sandstorms by planting trees, and plant plants suitable for desert arid areas, such as Hippophae rhamnoides, in desert areas to form a ground cover plant layer, thus improving the ground cover environment, fixing soil, reducing wind speed, increasing air humidity and improving the microclimate environment.

How to prevent sandstorms and close doors and windows in time, and seal doors and windows with tape when necessary; Don't go out unless necessary, even if you go out, wear a mask, cover your head with a scarf, and pay special attention to traffic safety; Motor vehicles and non-motor vehicles should slow down, pay close attention to road conditions and drive carefully; It is necessary to properly arrange outdoor items that are easily damaged by sandstorms.

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