How is summer hail formed? How are hail formed?

Causes of hail formation in summer:

Hail is produced when a thermal, moist air stream rises strongly. In summer, the weather is hot, and the sun bakes the earth, which is prone to produce a lot of hot and humid air near the ground. Hot and humid air rises rapidly and the temperature drops rapidly, sometimes as low as -3.

The water vapor in the hot air condenses into water droplets when it hits the cold air and quickly freezes to form Xiaoice beads. The Xiaoice beads tumbled up and down in the clouds, constantly absorbing and condensing the surrounding water droplets into ice, becoming heavier and heavier, and finally smashed down from the sky, which is hail.

Hail, also known as hail, is most common in summer or at the turn of spring and summer. The formation process of hail is similar to that of rain. In summer, when a large amount of water vapor rises to a temperature below -20 degrees Celsius, it becomes a Xiaoice droplet, and when the air cannot hold the Xiaoice ball, it falls from the sky.

In summer, the temperature of the ground is very high due to the direct sunlight of the sun, and a lot of hot and humid air is generated. Hot and humid air rises high into the air, and condensation points through the atmosphere condense into ice crystals and fall. In general, because of the hot summer, strong updrafts are generated, forming hailstones.

Generally speaking, the hail does not last long in summer, only for a few minutes or so, but when the hail comes, it is violent, intense, and accompanied by violent storms and rains.

The hazard of hail depends on the extent of hail, the size of the hail, and the duration. Hail is very harmful to crops and can cause serious damage to crops.

I believe that many people are curious, why do hailstones appear in the scorching summer sun and high surface temperature? Shouldn't hail form in cold weather? Why is there a hail in the summer? Step into the physical world and you will discover the mysteries of the natural world.

The reason why hail can form in the summer is because the surface temperature is high in the summer, and the evaporation is rapid, and when it evaporates to a certain height, it will solidify into an object and fall down. Anyone who has known about physics knows that the higher the altitude, the lower the temperature, and when the water vapor volatilizes to a certain height, it forms a solid. The reason why hail is formed in summer is very simple, that is, the two basic principles of temperature difference and height difference are used to form hail.

As for the number of hailstorms in a year, it is also very rare (hailstones are relatively small), give him a place or even more than ten years before the next time, when people see hail, people's hearts will be overjoyed and excited, but at the same time, we must also pay attention to safety to avoid being injured by hail. After all, hailstones vary in size, so don't be too negligent and be cautious when you go out. Pack up the items that stay out in time to avoid being smashed, especially some vehicles, fragile items, causing property loss, and even causing their own safety problems.

The physics world is very magical, many natural phenomena can be explained with physical knowledge, understand physical knowledge, you will find a different world, explore more wonderful, in the process of exploration, but also continue to improve yourself. Learning physics knowledge is not only conducive to our understanding of the natural world, but also more convenient for us to understand life.

When we question the natural world, we are exploring it, and we hope that when we solve our own difficulties, we should also draw inferences from others, apply our discoveries to practical life, protect its greatest value, and at the same time be in the process of self-realization.

Under the influence of the atmosphere, the water vapor in these clouds will first condense into snowflakes and then turn into raindrops in the process of descending, and when it encounters updrafts, it will be lifted up, condensed into Xiaoice beads at a lower temperature, and will combine with each other to form large ice beads in the high air, and after reaching a certain mass, the ice beads will gradually turn into hail.

Hail is formed in strong convective weather, and in the summer, the hot weather produces hot air and flows upstream, while the cold air above flows downward, causing convection of hot and cold air, so hail falls in summer.

Because the clouds are very high, the temperature is very low, and then the atmosphere rises, enters the clouds, and then hail is formed.

The generation of hail is associated with strong upwelling, which is prone to strong convective activity in summer.

Hail (hail) is also called "hail", commonly known as hail, "bazi", and some areas are called "lengzi" (such as Xuzhou, Gansu and other places), and it is most common at the turn of summer or spring and summer. It is as small as mung beans and soybeans, and as large as chestnuts and eggs.

When the surface water is exposed to the sun and vaporized, and then rises into the air, a lot of water vapor comes together and condenses into clouds, at this time the relative humidity is 100%, and when it encounters cold air, it liquefies, and the dust in the air is used as condensation nuclei to form raindrops (tropical rain) or ice crystals (mid-latitude rain), which are getting bigger and bigger.

When the temperature drops to a certain level, the air is oversaturated, so it rains, if it encounters cold air and there is no condensation nucleus, the water vapor condenses into ice or snow, which is snow, and if the temperature drops sharply, it will form a large ice mass, that is, hail.

Except for Guangdong, Hunan, Hubei, Fujian, Jiangxi and other provinces in China, which have fewer hailstorms, all parts of China are affected by hailstorms of varying degrees every year. Especially in the mountainous and hilly areas of the north, the terrain is complex, the weather is changeable, and there are many hailstorms, which are very harmful to agriculture.

Violent hailstorms often destroy crops, damage houses, and smash people and livestock. Huge hailstorms, even larger than grapefruits, can kill people, destroy vast tracts of farmland and trees, destroy buildings and vehicles, and more. It has great lethality. Hailstorm is one of the most serious disasters in China.

Hail is caused by the Xiaoice crystals that are supported by the updraft and do not fall. It grows up by constantly meeting cold water vapor in the air (a bit like making rice balls with rice flour), and the chances around it are equal, so it is round. When the upwelling can't hold it anymore, it falls like an ice storm.

In addition, it rubs against the air during the landing, and it forms a round and slippery "ice hockey".

Hail disaster is a kind of violent meteorological disaster caused by strong convective weather system, although its scope is small, the time is relatively short, but it is fierce and intense, and often accompanied by gusting winds, heavy precipitation, sharp cooling and other paroxysmal disastrous weather processes. China is a country with frequent hail disasters, which bring huge losses to agriculture, construction, communications, electricity, transportation, and people's lives and property every year. According to relevant statistics, China's economic losses caused by hailstorms amount to hundreds of millions or even billions of yuan every year.

Hail formation is a complex process, in a hail cloudStrong updrafts carry many large and small water droplets and ice crystal movementsSome of these water droplets and ice crystals combine to freeze into larger ice particles, and these particles and supercooled water droplets are transported by the updraft to the water accumulation area, which can become the core of the hailstone, and the core of the initial growth of these hailstones has good growth conditions in the water accumulation area.

After the hail core enters the growing zone carried by the updraft, it collides with supercooled water droplets in an area with a lot of water and a temperature that is not too low, and grows into a transparent layer of ice, and then up into the low temperature zone where there is less water, which is mainly composed of ice crystals, snowflakes and a small number of supercooled water droplets, with which the hail core sticks and freezes to form an opaque ice layer.

When the hail is unable to support the growing hail, the hail falls in the updraft, and continues to grow by merging ice crystals, snowflakes and water droplets in the fall, and when it falls to a higher temperature zone, the supercooled water droplets that touch and go up form a transparent ice layer.

If it falls into another stronger updraft, the hail will rise again, repeating the growth process. In this way, the hail grows transparently and opaquely; Due to the differences in the time, moisture content and other conditions of each growth, the thickness and other characteristics of each layer are also different. Finally,When the updraft can't support the hail, it falls from the clouds and becomes the hail we see.

Analysis of the victims of hail disasters in China:

By classifying and analyzing the existing hail cases in China, the results show that there are 6 major types and 20 subtypes of hail disasters in China, among which food crops are the most affected. From the perspective of dynamic changes, the following four subcategories are worth noting:

First, the rank of corn affected (compared with other crops) has risen, which is related to the extensive planting of corn in China and the development of plastic film corn planting. Mulching to advance the growth period of crops undoubtedly increases the time period for hailstorms.

The second is cotton, which has seen a significant increase in the number of disasters, especially in some of the main cotton-growing areas. It can be seen that the changes in crop varieties and crop area directly affect the magnification or contraction of the disaster.

With the improvement of the level of urbanization, the development of vegetables, fruits, forest fruits, especially flowers, and the widespread use of greenhouse technology, the probability of hail disasters has increased. It can be seen that the change of land cash crop output directly affects the vulnerability of the affected body.

Fourth, the number of communications disasters has increased dramatically, and with the rapid development of the country's communications industry, especially the rise of the network in recent years, the vulnerability of hail victims has been amplified.

Hail is a type of ice or lump of ice that falls from a strongly developing cumulonimbus cloud, most common in summer or at the turn of spring and summer, with a diameter of 5-50 mm, the largest can reach more than 10 cm, and the shape is mostly spherical. Hail is also an agrometeorological disaster that causes damage to crop branches, leaves, stems and fruits, resulting in reduced or poor crop yields. In addition, hail is often accompanied by strong winds and drastic cooling, as well as lightning and lightning phenomena, which can bring various hazards, such as damage to buildings and people.

Hail, like rain and snow, falls from the clouds. However, hail clouds are a very well-developed cumulonimbus cloud, and only particularly vigorously developed cumulonimbus clouds are likely to hail.

Hail is formed in convective clouds, the weather is hot in summer, the sun bakes the earth hot, it is easy to produce a large amount of hot and humid air near the ground, the water vapor in the air rises with the air current, the higher the height, the lower the temperature, the water vapor will condense into liquid water droplets, if the height continues to increase, when the temperature drops below zero degrees Celsius, the water droplets will condense into solid ice particles. <

Hail must be formed in convective clouds, the summer weather is hot, the sun bakes the earth hot, it is easy to produce a large amount of hot and humid air near the ground, the water vapor in the air rises with the air current, the higher the height, the lower the temperature, the water vapor will condense into liquid water droplets, if the height continues to increase, when the temperature drops below zero degrees Celsius, the water droplets will condense into solid ice particles. As the ice particles rise and fall repeatedly and condense by adsorption, they will become larger and larger, and when the ice particles are big and heavy enough, and there is not enough updraft to push them up, they will fall to the ground. If it still shows solid ice particles when it reaches the ground, it is a hail seen in the summer.

Hail is normal in summer, and only two conditions need to be met: 1Sufficient leakage of water vapor; 2.Strong convective air (i.e., warm and moist air rising rapidly). Huiqing Bridge

Hail is a solid precipitation that, like rain and snow, falls from clouds. It is a hard spherical, cone-shaped or irregular solid precipitation that falls to the ground from a strongly developed cumulonimbus cloud, and the masses in different places call it "hail", "ice egg", "cold seed" and so on.

In summer, although it is very hot near the ground, it is still very cold at high altitude. When encountering strong convective air, the moist air near the ground rises rapidly to the high altitude with the convection, condenses into Xiaoice crystals at high altitude, and when the Xiaoice crystals fall, they continue to merge some small water droplets with low temperature, and the ice crystals slowly become larger and form ice particles.

The ice particles are rolling in the air like a ball of dung, getting bigger and heavier. When it is heavy enough, the updraft can no longer support it, and it begins to fall, and it will fall to the ground as hail.