Reasons for more sandstorms in northern China in spring.

There are many sandstorms in the north of China in spring because there is too much geothermal energy in the north.

Sandstorm is a sign of desertification. It refers to a disastrous weather phenomenon that strong winds roll up a lot of dust on the ground, making the horizontal visibility less than 1 km. It has the characteristics of suddenness and short duration, low probability and great harm. Among them, sandstorm refers to a sand-laden storm formed by strong wind blowing a large amount of sand near the stratum; Sandstorm is a storm formed by strong winds, which brings a lot of dust and other particles into the sky.

Sandstorm is a common disastrous weather phenomenon in northern China in spring. The fundamental cause of sandstorm is dry climate, and human activities have aggravated the seriousness of the problem to some extent by interfering with the surface characteristics. Sandstorms in China mainly occur in northern areas.

The causes of sandstorm formation are: the dust on the ground, which is the material basis of sandstorm formation. Strong wind is the dynamic basis for the formation of sandstorms and the dynamic guarantee for the long-distance transportation of sandstorms. The air state is unstable, which is an important local thermal condition. Sandstorms often occur in the afternoon and evening, which shows the importance of local thermal conditions.

Natural conditions for the formation of sandstorms

The weather situation favorable to strong winds or strong winds, favorable distribution of dust sources and favorable air instability conditions are the main reasons for the formation of sandstorms or strong sandstorms. 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 and winding it higher.

In addition, drought and lack of rain in the early stage, warming weather and rising temperature are the special weather background for the formation of sandstorms; The convective cells before the ground cold front develop into clouds or squall lines, which is a small and medium-sized system conducive to the development and strengthening of sandstorms. The topographic condition conducive to the increase of wind speed, that is, the narrow tube effect, is one of the favorable conditions for the formation of sandstorms.

The above contents refer to Baidu Encyclopedia-Sandstorm.