What are the hazards of sandstorms and what are the hazards of sandstorms?

What are the hazards of sandstorms?

Hazards caused by sandstorms:

1. Environmental pollution

When there is a sandstorm, the sand and gravel and floating dust wrapped in the wind are everywhere, and the air is turbid, choking and foggy, and the respiratory tract is everywhere.

and other diseases increased in the number of people. For example, it occurred in Jinchang City on May 5, 1993.

In the strong sandstorm weather, the monitored outdoor air dust content is 1016 mm cubic centimeter, and the indoor air is 80 mm cubic centimeter, which exceeds the national standard for air dust content in the living area by 40 times.

2. Production and life are affected.

The large amount of sand and dust carried by sandstorms obscures the sun, and the weather is gloomy, causing solar radiation.

Reduced visibility from a few hours to a dozen hours of poor visibility.

It is easy to make people feel dull and reduce the efficiency of work and study. In severe cases, it can cause a large number of livestock to suffer from respiratory and gastrointestinal diseases, and in severe cases, it will lead to the death of a large number of "spring shortage" livestock, and scrape away the fertile soil, seeds and seedlings of farmland.

3. Loss of life and property.

On May 5, 1993, it occurred in Jinchang City and Wuwei City, Gansu Province.

Wuwei Minqin County.

**The strong sandstorm weather in cities and other cities affected 10,000 acres of farmland and lost 10,000 trees, causing direct economic losses of 100 million yuan, killing 85 people and seriously injuring 153 people.

On April 12, 2000, Yongchang, Jinchang, Wuwei, Minqin and other cities suffered severe sandstorms, and according to incomplete statistics, the direct economic losses of Jinchang and Wuwei alone amounted to 15.34 million yuan.

In sandstorm weather, we must first block the sand and dust from entering the body, and do the following protective work:

1. Try to minimize travel, close doors and windows when indoors, and avoid sand and dust exposure.

2. Pay attention to wearing a mask with dustproof and dust filtering effects when traveling, and use it correctly to reduce the sand and dust inhaled into the body. In addition, windproof glasses can be used to protect the eyes, and the glasses should be well transmitted to the light so as not to hinder the normal observation of road conditions.

3. Pedestrians should not walk or stay under billboards or trees. Don't rush when driving, and turn on your wide indicator lights.

Fog lights, tail lights, reduce speed, and honk more to warn vehicles in front and behind, left and right. For some small cars, try to drive in parallel to prevent being blown off the road by strong winds. Pay attention to avoid large trucks, away from balconies and billboards, and use internal circulation mode for air conditioners.

The above content reference: People's Daily Online - Sandstorm is coming, how should we protect ourselves.

The causes of sandstorms are: natural rubber parts, physical factors, environmental factors, human factors, and meteorological factors.

1. Natural conditions

Favorable weather conditions for the generation of high winds or strong winds, favorable distribution of sand and dust sources and favorable air instability conditions are the main reasons for the formation of sand and dust storms or strong sand and dust storms. Strong winds are the driving force of sandstorms, and the source of sandstorms is the material basis of sandstorms, and the unstable thermal conditions are conducive to the development of wind controve, so as to entrain more sand and dust and roll higher.

In addition, the drought and lack of rain in the early stage, the warming weather and the rising temperature are the special weather background formed by sandstorms. The development of convective cells in front of the surface cold front into clouds or squall lines is a small and medium-scale system that is conducive to the development and strengthening of sand and dust storms. The topographic conditions that are conducive to the increase of wind speed, i.e., the narrow tube action, are one of the favorable conditions for the formation of sandstorms.

2. Physical factors

Under the conditions of extremely favorable large-scale environment, upper-level dry and cold jet stream, strong vertical wind speed, wind direction shear and thermal unstable stratification, the formation and development of small and medium-scale systems near the front area are caused, which aggravates the pressure and temperature gradients before and after the front area, and forms a huge pressure and temperature gradient before and after the front area.

Under the combined action of momentum downward transmission and gradient deviation wind, the wind speed near the surface rises sharply, raising surface sand and dust, and forming sandstorms or strong sandstorms.

3. Environmental factors

Soil wind erosion is the primary link in the occurrence and development of sandstorms. Wind is the most direct driving force of soil, and the nature of air flow, wind speed, and the relevant conditions of wind during soil wind erosion are the most important factors. In addition, soil moisture content is also one of the important causes of soil wind erosion.

4. Human factors

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, and form a large area of desert trouser rewilding land, which directly accelerates the formation and development of sandstorms.

5. Meteorological factors

The formation of sandstorms is based on the special atmospheric circulation of East Asia and is closely related to the winter monsoon, and the occurrence of Hu Chenghao is mainly related to the transit of cold fronts driven by the high pressure of Siberia and Mongolia in the winter half of the year.

What are the hazards of sandstorms?

It connects some of the most unlikely things on earth, in addition to alkaline dust storms, it can also improve the sudden pH, reduce the acidity of acid rain, reduce the emission of carbon dioxide from rocks into the atmosphere, improve the soil, let our crops thrive, and arguably the least favorite weather phenomenon of man, in fact, it is also a gift from nature.