Changchun belongs to the northern inland area with four distinct seasons. Although there are no mountains and water, it is picturesque. In recent years, there have been no geological disasters such as floods, mudslides, landslides, tornadoes and tsunamis. Particularly prominent natural disasters are sandstorms!

First of all, the formation of sandstorm weather should meet three basic conditions: first, there must be sand sources, and second,

There must be strong cold air, that is, strong wind, and the third is the interaction between cold and warm air. The sand comes from the desert.

Degraded forests and grasslands or dry loose land without vegetation cover and sediments from urban and rural construction sites.

Cyclones and low pressure produce vertical upward movement, blowing up dust and forming sandstorms.

In meteorology, the difference between sand blowing, floating dust and sandstorm weather is distinguished by visibility.

The horizontal visibility is between 1 ~ 10 km, and it is sand blowing or floating dust weather. When there is floating dust weather

The air is full of some fine particles, and most of the dust comes from other places; Roll up in windy and dusty weather

Dust is some large particles, which are basically produced locally. Horizontal visibility is less than

1 km is a sandstorm weather, which is a disastrous weather phenomenon and brings the greatest harm.

Seriously. According to meteorologists, the causes of sandstorms include wind power, strong convection in the upper atmosphere and

There are three factors in the state of the earth's surface. The first two are climatic factors, and human resources are irresistible. Therefore, the root

At present, it is impossible to remove sandstorms.

The wind disaster, sand accumulation and wind erosion caused by sandstorms have destroyed forests and vegetation and caused desertification.

The degree has intensified. Meteorologists remind that the most active and effective behavior of human beings in sandstorm weather is:

First of all, we should strengthen the monitoring and forecasting of windy weather, especially in the early drought.

Pay attention. Secondly, for a tourist metropolis like Xi, when a sudden disaster comes.

There must be quite effective emergency countermeasures before, strengthen management and strengthen preventive measures. For the whole province

Words, the most fundamental thing is to carry out comprehensive management work. The whole society * * * peers move to combat desertification.

Desert, improve the ecological environment. While doing a good job in economic construction, we should pay attention to ecological construction. each

Every citizen should have a strong sense of hardship and environmental protection, and should strengthen teaching in this area.

Education, so that we can really do a good job in afforestation, expand vegetation coverage, increase revenue and reduce expenditure, and use water rationally.

Resources. Shaanxi, in particular, is the bridgehead of the western development, and it is necessary to implement the policy of "returning farmland to forests"

Forest (grass), closing hillsides to facilitate afforestation, individual contracting, and taking food as relief as the main measures for early implementation.

Now, the rice grains go down to Sichuan, the fruit trees go up the mountain, and the grassland is full of slopes, making the land of Sanqin green, clear and rich. chase

Gradually restore the rich and diverse natural ecosystems. In this way, maybe in a few decades, the sandstorm will be lighter.

Turn it into our memory, and our descendants will see a beautiful northwest.

To prevent and control sandstorms, we must adjust the relationship between man and nature and vigorously protect and improve the ecological environment. This is a complex system engineering, which needs the attention of many governments and the whole society. In the dust source area, increase afforestation and grass planting, return farmland to forest and grass, and limit overgrazing; Only by developing clean energy such as solar energy and geothermal energy and reducing the emission of greenhouse gases into the atmosphere can the harm of sandstorms be controlled or reduced.

A number of sandstorm research experts from Chinese Academy of Sciences suggested in an interview recently that the study of sandstorms in China is out of touch with the study of meteorological conditions and the study of ground ecological environment, and the prevention and control of sandstorms should be combined with heaven and earth. Professor Yang Gensheng, a sandstorm expert in China and the Institute of Environment and Engineering in Cold and Arid Regions of Chinese Academy of Sciences, said that after years of research, China has now

We have a clear understanding of the causes of sandstorms, and initially formed a monitoring and forecasting system for sandstorms. These achievements have laid a foundation for the prevention and control of sandstorms. However, if there is wind but no sand, it is necessary to combine sky forecast with ground management, and take targeted measures to increase ecological construction.

Wang Tao, an expert on land desertification in China and director of the Institute of Environment and Engineering in Cold and Arid Regions of Chinese Academy of Sciences, also believes that strengthening ecological management is the fundamental way to prevent and control sandstorms. But at the same time, we should take various measures to resist sandstorms and reduce the losses caused by sandstorms. He said that Arizona, Texas and other places in the United States also have a lot of cultivated land, but in the study of sandstorms in the United States, the combination of heaven and earth has been very successful. Before each gale comes, the meteorological department in the United States can accurately predict the path of the gale 48 hours in advance, and then spray irrigation on the bare farmland in the area where the gale passes, so that the dry and loose soil becomes moist and firm, thus cutting off the supply of sandstorms and effectively curbing the occurrence of sandstorms. Wang Tao believes that although China's technical strength is not as strong as that of the United States, and its facilities are not as advanced as that of the United States, we should also pay attention to the coordination between the study of meteorological conditions and the control of ecological environment in the study of sandstorms, so as to realize the combination of heaven and earth in preventing sandstorms.

The greening in Changchun area is very good, which is the benchmark of the national green city. Facing the sandstorm. I believe that the green of Changchun will not turn gray because of dusty weather. The sun is always shining, the air is always fresh and the sky is always blue.