There are always many sandstorms in spring, so how are sandstorms formed?

Generally, because the wind is relatively strong in spring, the phenomenon of sand blowing will occur, and sandstorms will also be formed.

It is mainly formed by the influence of the weather, because of the asymmetry of the air flow, and because the air flow is too large.

Dust storms mostly occur in March and April in spring, December in winter, and January in the following year. Due to the sparse vegetation in the northern and northwest regions of China, the sandy soil is more, and the cold waves and winds are frequent, sandstorms are easy to occur in the spring when the climate is relatively dry.

Sandstorm is a general term for sandstorms and dust storms, which are a sign of desertification. It refers to a disastrous weather phenomenon in which strong winds roll up a large amount of sand and dust from the ground, making the horizontal visibility less than 1 km, and having the characteristics of suddenness and short duration. Sandstorms refer to sandstorms formed by strong winds blowing large amounts of sand particles into near-surface formations, while dust storms are storms formed by winds that sweep large amounts of dust and other fine particles into the upper air.

As one of the natural disasters in arid and semi-arid areas, sandstorms are not a modern product. According to scientists' measurements of sediments from deep-sea cores and ice sheets, dust storms occurred on Earth as early as the end of the Cretaceous period. Sandstorms refer to sandstorms formed by strong winds blowing large amounts of sand particles into near-surface formations, while dust storms are storms formed by winds that sweep large amounts of dust and other fine particles into the upper air.

Dust storms mostly occur in spring and winter.

The formation of dust storms is based on the special atmospheric circulation of East Asia and is closely related to the winter monsoon, and its occurrence is mainly related to the transit of cold fronts driven by the Siberian-Mongolian high in the winter half of the year.

The occurrence of sand and dust storms is not only a product of specific natural environmental conditions, but also has a corresponding relationship with human activities. Artificial overgrazing, indiscriminate felling of forest vegetation, industrial and mining transportation construction, especially man-made excessive reclamation, destroy ground vegetation, disturb the ground structure, form a large area of desertified land, and directly accelerate the formation and development of sandstorms.

The causes of dust storms are complex and multifaceted. The driving force of a sandstorm is the wind. The material basis is sand and dust.

Wind and sand have their own complex and diverse temporal and spatial variations. There is a strong enough wind, and there is also a sufficient amount of sand and dust. But blowing up a lot of sand and dust also requires a lot of conditions.

In the arid region of northwest China, strong northwest winds prevail. As a result of the uplift of the ancient Mediterranean, a large amount of soft sand and dust was formed. Drought and lack of rain vegetation sparse, especially drought, strong wind, and sparse vegetation all occur in spring, so spring has the natural conditions for the occurrence of sandstorms, coupled with human activities to destroy the ground vegetation, making sandstorms more and more intense.

Maybe it's because the temperature is very high at that time, so it's very dry, which can lead to sandstorms, which is very different.

The high probability of sandstorms in spring is mainly due to the destruction of some forest resources, which leads to sandstorms.

1. The temperature in most parts of northern China is higher than usual, and the precipitation is the second least since the 50s of the last century. At the same time, the cold and warm air is more active, the windy weather is more, the wind blows the sand, and the sand and dust naturally appear frequently.

2. Sandstorm is a common disastrous weather phenomenon in spring in northern China. Are sandstorms the result of natural factors, or are they mainly caused by environmental damage caused by human activities? At present, the understanding of this problem in the academic community is basically the same, that is, the root cause of sand and dust storms is still due to the dry climate, and the human life and air movement have exacerbated the problem to a certain extent by intervening in the characteristics of the land surface.

3. There are three basic conditions for the formation of sandstorms: first, there must be a sand source; Second, the soil of the sand source should be dry and loose; Third, there must be a strong cold air invasion, that is, there are circulation conditions to produce strong winds.

4. In addition, as a high-intensity sandstorm disaster, sandstorms can not occur in all windy places, and only those areas with arid climate and sparse vegetation can occur in bright clump areas. In the northwest of China, the forest coverage rate is not high, and some excessive predatory mining and destruction behaviors have exacerbated the sandstorm disasters in these areas. Experts say that it is by no means easy to "subdue" sandstorms, nor can it be effective overnight, on the one hand, trees and grasses should be planted scientifically, especially in the source areas of sandstorms.

Taking Beijing as an example, most of the sand and dust affecting Beijing is sand and dust from other places, and planting trees around Beijing and other cities cannot stop the dust, and the important thing is to lock the source of the sand. On the other hand, in areas with fragile ecological conditions, such as the northwest, rational agricultural production methods should be promoted, the results of returning farmland to forests should be consolidated, and the impact of human beings on the ecological environment should be reduced. Only by gradually recovering the fragile surface environment can it be possible to reduce the occurrence of sand and dust storms.