The cause of the snowstorm

The reason for the formation of snowstorm, namely blizzard, refers to the weather phenomenon that a large amount of snow is not falling, but being blown away by strong winds, and it is impossible to determine whether there is snowfall at that time, and the horizontal visibility is less than 1km. The cause of the snowstorm.

The snowstorm is caused by 1 blizzard, a natural climate disaster. Blizzard is the general name of heavy precipitation weather below -5℃, accompanied by strong cold air flow. A severe snowstorm. This is also a metaphor for a political storm.

The main causes of snowstorm formation

On the one hand, this is a natural law, and the hot and cold of the earth has a certain relationship with solar activity. Every 10 years or so, there will be a low tide of solar activity, and the earth will be particularly cold.

On the other hand, as far as the specific situation is concerned, it is getting colder and colder in winter because of the greenhouse effect caused by environmental problems.

In addition, some places are sometimes hot, but some places are sometimes cold. The greenhouse effect does not mean that the temperature has been rising. In Europe, global warming will be manifested as getting hotter in summer and colder in winter.

What are the hazards of snowstorm?

In the snowstorm, a lot of snow was carried away by strong winds, so it was impossible to judge whether there was snowfall at that time. The horizontal visibility is less than 1km. In this environment, people will lose their sense of direction, and it is very easy to get lost and freeze to death in the wild. In the event of a snowstorm, the herds are terrified, and often rush with the wind because they can't tell the direction, and they can't catch up with the circle. They often fall into blisters in lakes or fall off cliffs, and die and freeze to death. Pregnant female animals run in adversity, which easily leads to mechanical abortion; Some young animals even indulge in polluted snow or frozen grassland, which leads to the outbreak of malignant infectious diseases and the death rate of young animals rises sharply. Blizzard is one of the disastrous weather in animal husbandry production.

Reasons for the Formation of Blizzard 2 Blizzard weather phenomena generally appear in Inner Mongolia Autonomous Region and Xizang Autonomous Region. According to the statistics of snow disasters over the years, the meteorological department analyzed that the possibility of snow disasters in the north of China is greater than that in the south. But once there is a snowstorm in the south, the damage will be much more serious than in the north. South China belongs to subtropical monsoon climate, and the temperature in winter is generally above ot, and many crops are overwintering crops. In such weather conditions, residents generally do not need heating equipment and facilities in their lives, and there is no warm clothing at home. Drivers don't have to worry about diesel freezing. People were not prepared in advance for the arrival of cold wave and snowstorm.

Therefore, the sudden drop in temperature and the snowstorm have brought people more serious disasters and incalculable losses. And people's unconscious and unguarded psychology will contribute to the disaster. The snowstorm caused great losses to agriculture. Under the attack of snowstorm, a large number of overwintering crops could not stand the ravages of cold wave, many of them were frozen to death, and the agricultural harvest was greatly reduced. In some places, agriculture will even fail, such as winter wheat, overwintering rape and green manure crops.

In addition to crops, animal husbandry will also be seriously affected, and a large number of livestock will definitely freeze to death and frostbite. It can be seen that livestock will inevitably be hurt by snowstorms. When the storm and snow come, strong cooling is accompanied by strong winds, resulting in very low visibility. In this weather, it is very dangerous if livestock are still scattered outside without pens.

This will not only lead to the loss of livestock, but also hurt their lives. According to scientific determination, every kind of livestock will have a limit of life temperature. When the body temperature can't be constant, when it drops beyond this limit, livestock will face the danger of death. In the environment of low temperature and strong wind, it is difficult to keep the body temperature of livestock constant if the snowstorm comes again.

This is mainly due to non-evaporation heat dissipation, which makes the thermal regulation in livestock lose balance after a period of time.

The reason for the formation of snowstorm is blizzard, which refers to the weather phenomenon that a lot of snow is not falling, but being blown away by strong winds, and it is impossible to determine whether there is snowfall at that time, and the horizontal visibility is less than 1km. Blizzard is a natural meteorological disaster, which is the general name of heavy precipitation weather below -5℃, accompanied by strong cold air flow.

The formation of a snowstorm is similar to a storm. Usually, in winter, when the temperature in the cloud is low, the water droplets in the cloud will freeze. When these frozen water droplets hit other water droplets, these water droplets become snow. When they turn into snow, they will continue to collide with other small water droplets or snow. When the snow becomes too heavy, it will fall. Although most of the snow is harmless, once the wind speed reaches 56 km /h, the temperature will drop below -5℃. If there is a lot of snow at this time, a snowstorm will form.

People often talk about snowfall. What does it mean when someone says "it snowed 6 inches yesterday"? Go outside and you may not see 6 inches (15cm) of snow. It is more likely that you will find that the snow in some places is only 3 feet (7. 5 cm) thick, but in some places the snow depth exceeds 1 foot (30 cm), and in some places there is no snow at all. So, how on earth did people get the figure of 6 inches of snow?

Snow is different from rain. As a liquid, rain is flowing and cannot be compressed. Even if water is squeezed hard, its quantity will not change. On the open ground, if there is nothing to cover it up, the rainfall of 1 inch (25mm) is the same everywhere. Snow does not flow, but starts to accumulate after landing. The wind blows it to some places, so the snow in some places is thicker than others. Snow is different from snow. Wet snow takes up more space than dry powdery snow. Because there are gaps between dry snow particles, they can be compressed.

It must be noted that when we talk about "6 inches of snow", we must also point out what kind of snow it is and where this depth value was found. Perhaps there is only one way to solve this problem, that is, carefully choose a place to measure the depth of snow, and then treat snowfall as rainfall. This is the job of meteorologists, and the results will tell them more useful information than the amount of snowfall. The data will tell them how much precipitation there is. They collect snow, then melt it, and finally they report the same amount of snowfall as the rainfall. There will be some differences in this data due to different temperatures. The table shows the snowfall equivalent to rainfall in a certain temperature range. At 29 ~ 34 degrees Fahrenheit, the first snowfall is only equal to the water at its depth110.

1In late July, 977, the snowstorm in Buffalo, USA was one of the biggest snowstorms so far. Buffalo is located in the snow belt in the east of the Great Lakes. In most winters, several feet of snow is common. However, the snowstorm of 1977 was worse than this. The humid wind from Canada has been blowing at a speed of 70 mph (1 13 km/h) for five days, and 4 ft (1.2 m) of snow has accumulated on the snow that dropped by 3 ft (0.9 m) a few days ago. In some places, it is even deeper, and the thickness of snow reaches 30 feet (9 meters), which is very rare.

The wind attracts snow, not that the power of the wind will bring us trouble, but that the amount of snow brought by the wind will make us daunting. Wind and snow are inseparable. Strong winds can lift the snow on the ground and add them to the falling snow team. This is what happened in Buffalo 1997. A large amount of snow accumulated on the ice of Lake Erie was swept away by strong winds and dumped in Buffalo.

The energy of wind decreases in the blowing process, and the amount of objects carried by wind energy depends on its energy. At this time, the wind is like a river. A swift river carries dirt, sand and pebbles. After a heavy rain, the river will become turbid because it carries a lot of sediment. When the river slows down and its energy decreases, heavy substances such as stones will sink to the bottom of the river. Rivers can no longer take them away. With the decrease of energy, more and more substances sink, and the heaviest substances sink to the bottom first. Similarly, when the wind loses energy, the objects it carries will fall. When the energy of the wind blowing snow is lost, the snow will fall and form thick snow on the ground.