Advantages and disadvantages of sandstorm

The advantages and disadvantages of sandstorms destroy vegetation, accelerate desertification, increase inhalable particles in the air (reduce air quality), and affect normal life.

Benefits reduce acid rain (sandy soil is alkaline)

If it happens at the seaside, it can increase the organic content in coastal seawater and form a fishing ground.

Impact of Sandstorm on Environment (Advantages and Disadvantages) The hazards of Sandstorm can be roughly divided into four categories: sand burial, wind erosion, strong wind attack and air pollution.

Sand-buried sandstorm pushes forward with overwhelming momentum, and the sand in the lower layer rolls forward under the strong wind. When encountering obstacles or the wind is weakened, sand grains will fall and bury farmland, villages, mines, railways, highways, water sources, etc. This kind of harm generally appears in the areas where sandstorms invade oases and Gobi deserts, and also in the narrow strip where deserts are connected with flaky sandy land.

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Wind erosion The powerful wind erodes the surface material, just like scraping things with a knife. Wind erosion soil not only scraped away fine clay minerals and precious organic substances in the soil, but also accumulated fine sand on the soil surface, making the originally fertile soil barren.

A gale attack is accompanied by a sandstorm. Wherever a strong wind goes, it roars, uprooting trees, blowing down walls, destroying houses, overturning trains, destroying telephone poles, and causing human and animal casualties.

Pollution of Atmospheric Environment Due to the effect of sandstorm, the whole earth discharges 2~200 tons of dust into the air every square kilometer every year. It is observed that the dust in Central Asia can be transported to the Hawaiian Islands 10,000 kilometers away by the westerly airflow. These dusts contain many toxic minerals, which are harmful to human body, livestock, crops and trees, and can cause eye diseases and respiratory infections.

Sandstorm is a kind of disastrous weather, and strong sandstorm will cause great losses to people's lives and property.

1On the afternoon of May 5, 993, a strong sandstorm occurred in northwest China. At first, a sandstorm wall appeared in the northwest of Jinchang. Ten minutes later, the city was dusty, dark and opaque. From time to time there was dull thunder, and a terrible scene appeared between heaven and earth. This state lasted for nearly three hours in Jinchang, and swept eastward to Wuwei, Baiyin, Alashan League, Inner Mongolia, and Yinchuan, Ningxia, wreaking havoc in Fiona Fang for 500 kilometers. It lasted for five hours, hundreds of people were killed, injured and missing, and the direct economic loss was 540 million yuan, which also caused many environmental problems.

What are the disadvantages of sandstorm to people? 1. Soil wind erosion, vegetation destruction, farmland burial.

2. Polluted air According to the monitoring network of the State Environmental Protection Administration, on the day of the strong sandstorm on March 20, the amount of dustfall per square meter in Beijing reached 20 grams, and the total suspended particulate matter reached 20 micrograms per cubic meter 1 1000, more than ten times the national standard and more than the normal value 100 times.

3. The impact of sandstorms on traffic is mainly manifested in the following aspects: First, the visibility is reduced, which affects driving and aircraft take-off and landing. For example, seven airports in South Korea were forced to close on March 22nd, and about 70 flights were forced to cancel on March 2nd1day. Second, sand and dust bury the roadbed and hinder traffic. According to China Business Daily, the train from Urumqi to Xi was blocked because the sandstorm buried part of the railway.

4. Affect the use and production of precision instruments.

5. There are many kinds of health damage caused by sandstorm, which is harmful to human health. Skin, eyes, nose and lungs are the first places to contact sandstorms and suffer the most. The damage of skin, eyes, nose, throat and other direct contact parts is mainly * * * symptoms and allergic reactions, while the lung performance is more serious and extensive. Seven years ago, American health scientists first suggested that there was a link between fine pollution particles and lung disease and heart disease death. Australia's "Time" said that sandstorms caused by soil wind erosion are the chief culprit of asthma in 2 million people in the country.

6. Causing weather and climate changes The impact of this sandstorm not only involves China 13 provinces, but also affects South Korea and Japan; 65438+1September 1998, a sandstorm originated in Kazakhstan, passed through a vast area in northern China, and transported a lot of dust to North America through high altitude; In April of 20001year, a strong sandstorm originated in Mongolia swept across the Pacific Ocean and the continental United States, and finally dissipated over the Atlantic Ocean. Such a large range of dust forms suspended particles in the sky, which is enough to affect the weather and climate. Because suspended particles can reflect solar radiation, thus reducing the atmospheric temperature. Because suspended particles greatly weaken the solar radiation (about 10%), the speed of the earth's water circulation may slow down and the precipitation will decrease; Suspended particles can also inhibit the formation of clouds, reduce the precipitation rate of clouds and reduce the water resources of the earth. It can be seen that dust may aggravate the drought.

What are the benefits of sandstorms? First, particles (aerosols) in the atmosphere, including dust, can cool down because they can reflect a large amount of solar radiation falling into the earth, thus offsetting a large amount of greenhouse gases emitted by about 20% industries and global warming caused by the enhancement of greenhouse effect in the earth's atmosphere.

Second, although the amount of acid pollution gas emitted by industries in the north of China is not less than that in the south, there is no common acid rain in the south. The main reason is that alkaline dust in the atmosphere will neutralize acid rain. By the same token, in South Korea and Japan, where the weather in China is downstream, whenever the dust airflow in China moves eastward in spring, most of the rainwater immediately turns from acidic to neutral.

Thirdly, the dust flow from the west has accumulated a loess plateau with an area of one million square kilometers in China for millions of years. Crops on the loess not only solved the problem of food and clothing for farmers; Moreover, tens of millions of loess caves on the plateau, which are warm in winter and cool in summer, have solved the housing problem of 40-50 million farmers and reduced many people who have frozen to death in the cold wind for thousands of years. These are not trivial matters.

What are the benefits of sandstorms? The loess on the Loess Plateau can be said to be the accumulation of dust caused by numerous sandstorms in history.

What are the benefits of sandstorms? It brings nutrition to the marine system, otherwise the small fish and shrimp will lose their food. If there were no sandstorms, global warming would be more serious.

Sandstorm and smog, or sandstorm is better? Not at all.

Sandstorm is a general term for sandstorm and sandstorm. It refers to a severe sandstorm weather phenomenon in which strong winds blow and drag a large amount of sand and dust on the ground into the air, making the air particularly turbid and the horizontal visibility less than one kilometer. Among them, sandstorm refers to a sand-laden storm formed by strong winds blowing a large number of sand near the ground; Sandstorm is a storm formed by strong winds, which brings a lot of dust and other particles into the sky.

Haze is the result of interaction between specific climatic conditions and human activities. The economic and social activities of high-density population will inevitably emit a large number of fine particles. Once the emission exceeds the atmospheric circulation capacity and carrying capacity, the concentration of fine particles will continue to accumulate. At this time, if it is affected by calm weather, it is easy to have a wide range of smog.

in short

Sandstorm particles can be worn with ordinary masks.

Small particles of smog need to wear a special M3.0 mask.

How to deal with sandstorms and try not to go out? Wear a mask and glasses when going out. afforest