In what season does the sandstorm occur?

Sandstorm is a weather phenomenon in which wind and sand interact with each other, that is, the visibility of the atmosphere drops sharply due to the strong wind blowing up the dust on the ground. So when does the sandstorm happen? The following small series brings you the season of sandstorms. I hope you like it.

In what season does the sandstorm occur?

Sandstorm weather mainly occurs in late spring and early summer. This is because there is little precipitation in winter and spring in arid areas, the surface is unusually dry and loose, and the wind erosion resistance is very weak. When there is a strong wind blowing, a lot of dust will be involved in the air, forming sandstorm weather.

In recent years, sandstorm weather has brought great influence to our country, with dust crossing the border and dust flying all over the sky. Sandstorm weather mainly occurs in late spring and early summer. This is because there is little precipitation in winter and spring in arid areas, the surface is unusually dry and loose, and the wind erosion resistance is very weak. When there is a strong wind blowing, a lot of dust will be involved in the air, forming sandstorm weather. It mainly originated in desertification areas, with soft soil, dry ground and no vegetation on the ground.

Harm of sandstorm

environmental pollution

When the sandstorm comes, there are dust and floating dust wrapped by strong winds everywhere, and the places where people with air turbidity, choking nose and eyes, respiratory tract and other diseases pass by increase. For example,1A serious sandstorm occurred in Jinchang on May 5, 993. The dust content in outdoor air is 10 16 mm/cm3, and the dust content in indoor air is 80 mm/cm3, which is 40 times higher than the national standard for dust content in living quarters.

Production and life are affected.

A large amount of dust carried by sandstorm weather blocks the sun, resulting in a decrease in solar radiation. A few hours to ten hours of poor visibility can easily make people feel depressed. In light cases, a large number of livestock can be infected with respiratory and gastrointestinal diseases, and in severe cases, a large number of "spring-deficient" livestock will die, and fertile soil, seeds and seedlings in farmland will be scraped away. Sandstorm will also aggravate the wind erosion and desertification of the surface soil, cover thick dust on the leaves of plants, affect normal photosynthesis and cause crop yield reduction.

Loss of life and property

1On May 5, 1993, a serious sandstorm occurred in Jinchang, Wuwei, Minqin and Baiyin, Gansu Province, which affected 2,535,500 mu of farmland, lost 42,800 trees, caused a direct economic loss of 236 million yuan, killed 85 people and seriously injured 153 people. On April 12, 2000, serious sandstorms occurred in Yongchang, Jinchang, Wuwei and Minqin. According to incomplete statistics, the direct economic losses in Jinchang and Wuwei alone amounted to15.34 million yuan.

Affect traffic safety

Sandstorms that affect traffic safety (traffic accidents such as airplanes, trains and cars). ) often affect traffic safety, resulting in aircraft can not take off or land normally, cars, train cars break, stop or derail.

Harm to human health

When people are exposed to dusty weather, dust containing various toxic chemicals and bacteria can enter the mouth, nose, eyes and ears through layers of protection. If the dust containing a lot of harmful substances is not cleaned in time, it will cause damage to these organs or bacteria will take these organs as invasion points, causing various diseases. High dust concentration in the atmosphere is easy to cause respiratory diseases. For example, sandstorm pneumoconiosis is an endemic disease caused by severe atmospheric dust in arid and semi-arid environments.

land deterioration

There are two main hazards of black wind (especially strong sandstorm): one is wind, the other is sand; There are two hazards of strong winds: one is wind damage, and the other is scraping the ground.

Suggestions on prevention of dust weather.

1. If you need to go out in sandstorm weather, you should bring dust-proof articles such as masks, scarves and eyes to avoid the damage of sandstorm to respiratory tract and eyes.

2. When dust occurs, close the doors and windows in time. Humidifier, sprinkling water or mopping the floor with a wet mop should be used indoors to clean the dust, keep the air humidity appropriate and avoid dust flying. 50% ~ 60% relative humidity is the most comfortable for human body.

3. When you enter the room from the outdoor, you should wash your face in time, rinse your mouth with clear water, clean your nose, take a shower if possible, change clothes in time, and keep your body clean and comfortable.

4. When sandstorm weather happens, patients with respiratory diseases and people who are sensitive to sandstorms should not go out. Myopia patients should not wear contact lenses to avoid eye inflammation.

In dusty weather, once the dust is blown into your eyes, never rub it with dirty hands. Rinse with clear water or drop eye drops as soon as possible to keep your eyes moist, which is convenient for dust to flow out. If you still feel unwell, you should seek medical advice promptly.