What is the phenomenon of thunder?

We often encounter the phenomenon of thunder in spring, and its symptoms are:

1. The thunder of spring indicates that winter has passed and spring is coming. Spring has come, and many hibernating animals are awake. When they wake up, they are all around the "fright". "Sting" is one of the 24 solar terms. "Sting" means hiding. "February Festival, everything is shocked, shocked by thunder, hence the name".

2. "Stunned" means that the wintering animals are awakened by the thunder of spring and come out to move, which is also a warning to the coming of spring. Every spring, especially after dormancy, the obviously enhanced warm and humid air and cold air violently confront each other, resulting in a strong vertical convection movement of the air. Spring is coming. With the enhancement of warm and humid air and abundant water vapor, the towering thunderstorm cloud system develops, so spring thunder occurs every year.

Whether the spring thunder hits early or late has different meanings.

Most people say that "spring thunder strikes early and autumn harvest will be good", and "spring thunder strikes early and there are many typhoons"

In fact, this sentence is an agricultural proverb, but it was not casually said before. Spring thunder is a sound wave degenerated from the shock wave generated by the rapid expansion of lightning channel, which is manifested as a rumbling sound accompanied by lightning phenomenon.

Every spring, the obviously enhanced warm and humid air confronts the cold air fiercely, resulting in strong vertical convection movement of the air. When the moist warm air rises to a certain height, it will form a high cumulonimbus cloud, and the strong electric field in the cloud will make the positive and negative charges collide and discharge, thus causing sudden lightning. Typhoon is formed because the air at the bottom will rise when heated. In areas with high temperatures, when some disturbances in the atmosphere happen, a large amount of air will rise, which will reduce the air pressure on the ground. At this time, the air outside the rising area continues to flow into the rising area. Because of the rotation of the earth, the flowing air will turn like a wheel, which is also one of the reasons for the typhoon. After the rising air expands and cools, the water vapor in it cools and condenses into water droplets, releasing heat, which in turn promotes the rise of low-level air, reduces the ground pressure and makes the air rotate more violently, thus forming a typhoon.

When it rains, some clouds in the sky are positive and some are negative. When two kinds of clouds meet, they will emit lightning and a lot of heat, which will make the surrounding air heat and expand. Instantly heated and expanded air will push the surrounding air and produce strong explosion vibration. This is thunder.

Lightning is a plasma conduction state formed by the extranuclear electrons of space gas excited by electric field, accompanied by optical radiation and thermal effect. Due to the action of light and thermal radiation, the temperature of the surrounding air rises sharply, leading to thermal expansion, which in turn pushes the air to form a shock wave, that is, the sound of thunderstorm we hear.

People often say: spring thunder comes early in good years, or: March thunder refers to the March of the lunar calendar, that is, early spring. In the folk, people usually think that spring thunder indicates a good year with good weather.

"Twenty-four solar terms set" says: "Sting, February Festival." "Called the first summer. Sting, words sting. Everything is shocked, and it is thunder, so it is called shocking. It's an escaped cockroach. "There is a proverb that says,' Thunder thunders, it's warm, and the old toad sings folk songs', and' Thunder strikes, it shakes Gu Mi, and it shakes Remy into mud'". This means that hearing thunder on the day or after the thunder is a good sign, which indicates that the weather is good and it is a good year.

The saying that the spring thunder struck in the twelfth lunar month:

1, beware of wealth

It thunders in the twelfth month, so at this time, everyone needs to pay attention to the problem of money, which may lead to financial ruin because of bad luck. It is suggested that it is best not to make any financial-related decisions because of anyone's one-sided views. It is not appropriate to invest rashly or be stingy. If you don't calculate carefully, life may become more and more difficult, especially during the Spring Festival.

Be careful of your luck.

When it thunders in the twelfth lunar month, we should pay attention to the weakness of the nobles. At this time, your luck is declining. Even if you meet a noble person, you may not be able to grasp it well, and you may miss the opportunity of development. In this case, it is easy for everyone to lose confidence in their own life. Meeting and missing are the most testing things. It is recommended to wait patiently, reflect on yourself and wait for the next opportunity.

People who thundered in the first month piled up:

When it thundered in the first month, farmers were very taboo and scared. People piled up in graves. We say here that when it thunders in the first month, there will be an epidemic, and then many people die of illness, so people pile up, which is a natural disaster. There is also a saying called "thunder in the first month, thieves everywhere", which is similar. People who have nothing to eat and drink during the famine have to be thieves, or they can't live, so I won't say much, which is a bit superstitious. We must firmly believe that man can conquer nature, even if there is a dragon, it is also towards mankind.

Spring thunder formation:

Spring thunder, meteorological term. Every spring, especially after the sting, the obviously enhanced warm and humid air confronts the unruly cold air Ole, causing strong vertical air convection. When moist warm air rises to a certain height, it will form high cumulonimbus clouds. The strong electric field in the cloud will make the positive and negative charges collide and discharge, thus causing sudden lightning.

Thunder only conforms to the meteorological laws in some parts of southern China. In spring, affected by the warm and humid air current in the south, the air is humid and the solar radiation is sometimes strong. The air near the ground is constantly heated up, and the upper cold air sinks, which is easy to form strong convection, so there are many thunderstorms and even hail. It can be seen that the occurrence of lightning at this time is not only related to the increase of near-surface temperature, but also related to the cold air activity and the obvious increase of water vapor in the air.

Spring is coming. With the enhancement of warm and humid air and abundant water vapor, the towering thunderstorm cloud system develops, so spring thunder occurs every year.

Why are there many thunderstorms in summer?

Thundershower is produced under the condition of strong convective movement of wet air, and its occurrence is closely related to the stability of the atmosphere.

In summer, on sunny and windy days, the ground is exposed to strong sunlight, and the air close to the ground is heated. The closer to the ground, the higher the temperature rises. Afternoon is the time when the ground temperature rises the highest, and it is also the most unstable period of the day, so the strong convection movement develops the fastest at this time. If the air is very humid and rich in water vapor at this time, there will be thunderstorms in the afternoon and evening. This kind of thunderstorm formed by intense ground heating is called thermal thunderstorm. From midnight to morning, the ground temperature drops to a minimum, the atmosphere tends to be stable, and it is not easy to form thermal thunderstorms.

The occurrence of thunderstorms in spring is different from that in summer. Hot thunderstorms in summer mostly occur under the same heating air mass, and the weather is sunny the day before the thunderstorm, while thunderstorms in spring mostly occur in the area where cold and warm air masses meet. When two cold and warm air masses meet, warm and humid air climbs on the back of cold air, and a large amount of water vapor condenses out, which makes the sky gloomy. It has rained for several days, and there is no sunshine on the ground all day. It is impossible for the temperature to rise very high during the day and fall very low at night, and the daily change of the temperature is very small. But at the top of the high-altitude clouds, the sun is still shining during the day, and the temperature there changes greatly every day.

During the day, the clouds are very hot by the sun, the temperature is easy to rise, the atmospheric head becomes lighter, the stability increases, and the possibility of thunderstorm formation decreases; At night, the cloud top radiates heat into space, and the temperature in the upper part of the cloud drops, especially from midnight to morning, the temperature drops to the lowest value of the day, and the atmospheric head becomes heavier and tends to be unstable. Convective movement develops in this cloud, forming a Lei Yun with thunder and lightning and torrential rain. This is why spring thunder appears from midnight to morning.

How is lightning formed?

Lightning is a strong discharge phenomenon between clouds, between clouds and the ground, or between different parts of clouds (usually in cumulonimbus clouds).

Usually, storm clouds (cumulonimbus clouds) will generate charges, with negative charges at the bottom and positive charges at the top, and the ground will also generate positive charges, which will move with the clouds. Positive and negative charges attract each other, but air is not a good conductor. Positive charges rush to tree tops, hills, tall buildings and even human bodies in an attempt to meet negatively charged clouds; Dendritic tentacles with negative charges extend downward and get closer and closer to the ground. Finally, the positive and negative charges finally overcome the air barrier and connect. A huge current rushed from the ground to the clouds along the conductive path, producing a bright flash.

The length of lightning may be only a few hundred meters (the shortest is 100 meter), but the longest is also several kilometers. The temperature of lightning varies from 17000 degrees to 28000 degrees, which is equivalent to 3~5 times the surface temperature of the sun. The extreme heat of lightning caused the air along the way to expand violently. Air moves very fast, so waves are formed and sounds are made.