Why is there thunder and lightning in summer, why is there thunder, lightning?

In summer, lightning and thunder are common natural phenomena. Do you know what lightning is all about? It is the static electricity generated when the thunderstorm clouds move high in the air and rub against each other, and when the static electricity accumulates to a large extent, they will discharge each other, thus forming the lightning that we see cutting through the sky.

The process of lightning if we add a very high voltage between the two electrodes and bring them closer together. When two electrodes are brought close to each other, an electric spark occurs between them, which is known as "arc discharge". The lightning produced by thunderstorm clouds is very similar to the arc discharge mentioned above, except that the lightning is fleeting, while the sparks between the electrodes can exist for a long time.

Because the high voltage between the two electrodes can be artificially maintained for a long time, it is difficult to replenish the charge in a thundercloud immediately after discharge. When a certain amount of charged is accumulated, a strong electric field is formed between different parts of the cloud or between the cloud and the ground. The electric field strength can reach several thousand volt centimeters on average, and up to 10,000 volt centimeters in local areas.

The electric field is strong enough to penetrate the atmosphere inside and outside the clouds, so that dazzling flashes of light are triggered between the clouds and the ground, or between different parts of the clouds and between different cloud masses. This is what people often call lightning!

I heard thunder first, because of the previous thunder!

Thunder is a large amount of current flowing through the air requires two conditions, one is that the clouds accumulate a large amount of charge, the other is that the discharge path is smooth, there are two reasons for not thundering in winter 1 is that it snows more in winter, and the cloud produces charge mainly because of the updraft and its friction, there are few updrafts in winter, so the charge accumulation is not much 2 is that the air humidity in winter is not as large as in summer, and the moist air is easy to conduct electricity, so the clouds in winter are not easy to discharge Thunder and lightning are the discharge phenomenon in thunderstorm clouds. There are certain conditions for the formation of thunderstorm clouds, that is, there must be sufficient water vapor in the air, there must be a power to make the moist air rise, and the air must be able to produce violent convective movements. In spring and summer, due to the influence of the warm and humid airflow from the south, the air is humid, and at the same time, the solar radiation is strong, the air near the ground is constantly heated and rises, and the cold air in the upper layer sinks, which is easy to form strong convection, so there are many thunderstorms and even hail.

In winter, due to the control of the continental cold air mass, the air is cold and dry, and the solar radiation is weak, the air is not easy to form violent convection, so thundershowers rarely occur. However, sometimes the weather is warm in winter, and the warm and humid air is stronger, and when the strong cold air in the north occasionally goes south, the warm and humid air is forced to rise, and the convection intensifies, thundershowers will be formed, and the so-called "thunder winter" phenomenon appears. Meteorologists also say that the generation of thunderstorms does not depend on the temperature itself, but on the distribution of the temperature up and down.

In other words, although the temperature is not high in winter, if the temperature difference between the upper and lower reaches a certain value, strong convection can also be formed, resulting in thunderstorms. Winter thunder is rare in China, but it often occurs in the winter in Toronto, Canada When the air is extremely unstable, it is easy to have a strong upward convective movement, and the formation of towering cumulonimbus clouds, the clouds are filled with water vapor running up and down, static electricity will be generated, the upper end of the cloud will produce a positive charge, the lower end of the cloud will produce a negative charge, and the ground is a positive charge, then, there is air as an insulator between the positive and negative charges, if the voltage difference between the positive and negative charges is large enough to break through the air of the insulator, so that the air expands in an instant** , heat and glow, glow is lightning, expansion ** makes a huge sound is thunder.

I'm by you.

Hehe, just kidding) 1. Thunder is because when it rains, some of the clouds in the sky have yang electricity, some have yin electricity, and when the two clouds meet together, they will discharge, emitting very bright lightning, and at the same time emitting a lot of heat, so that the surrounding air is quickly heated, expanded, and makes a loud sound, which is thunder.

2. There is lightning because storm clouds usually produce electric charges, the bottom layer is yin electricity, the top layer is yang electricity, and it also produces a yang charge on the ground, moving with the clouds like a shadow. Positive and negative charges attract each other, but air is not a good conductor. Positive charges run toward trees, hills, the tops of tall buildings, and even on top of the human body, in an attempt to meet negatively charged clouds; The negatively charged branch-like antennae extend downwards and get closer to the ground as they go downward.

Finally, the positive and negative charges finally overcome the air barrier and connect. A huge electric current surged from the ground to the clouds along a conductive airway, producing a bright and dazzling flash.

That's how it came about, because in the summer, the rain clouds in the sky were too hot, and there was electricity, and they collided together, so there was thunder mixed with lightning!

In spring and summer, due to the influence of the warm and humid airflow from the south, the air is humid, and the solar radiation is strong, and the air near the ground is constantly heated and rises, while the upper cold air sinks, which is easy to form strong convection up and down, so that thunderstorm clouds are often generated, and thundershowers and even hail can easily occur.

Thunder is a natural phenomenon, and when it rains, some clouds in the sky have positive poles and some negative poles. When two clouds collide, lightning strikes, and at the same time emits a lot of heat, heating and expanding the surrounding air. The air that is heated and expanded in an instant will push the surrounding air, causing a strong **-type vibration.

This is thunder. When it is thundering and raining, it is strictly forbidden to stay on the top of the mountain or in the high hill area, and it is also important not to continue to pedal to a high place to watch the rain, not to take shelter under big trees, near telephone poles, and not to walk or stand in an open field, but to hide in a low-lying place as soon as possible, or to find a house or dry cave to take shelter as much as possible.

Because low temperatures are not prone to strong convection, thunder is rare in winter. Of course, if for some reason, when both conditions are met for strong convection and low temperatures, snow and thunder may occur.

The ground temperature is above 0 and the humidity is high. On the day of the thunderstorm, strong cold air affected the local area. The strong cold air comes into contact with the relatively warm and moist air near the surface, and the lighter warm and moist air is violently lifted, resulting in the formation of unstable stratification and the formation of thunderstorm clouds. Thunderclouds will thunder below 0 temperature.

Thunder requires that the atmosphere is very unstable, and strong convection occurs, and thunderclouds exist in the sky. This is easier to achieve in the summer due to the strong solar radiation and high ground temperature.