Traditional Culture Encyclopedia - Weather inquiry - Why doesn't it thunder when it rains in spring and autumn and thunder when it rains in summer?

Why doesn't it thunder when it rains in spring and autumn and thunder when it rains in summer?

Why doesn't it thunder when it rains in spring and autumn and thunder when it rains in summer? It usually only thunders during thunderstorms. Thundershower is due to the intense heat in summer and strong convection in some areas, which makes a lot of hot and humid air rise violently, resulting in cumulonimbus clouds.

Because of the strong convection of cumulonimbus clouds, it only occurs in summer, so thunder only occurs in summer.

Why doesn't it thunder when it snows in winter and when it rains in summer? Lightning usually occurs in strong convective weather. For example, in the tropical rain forest climate zone, the convective rain that often occurs in summer afternoons in China, and the typhoon rain that often occurs on the east coast of low latitude mainland are all accompanied by lightning.

Thunder is a discharge phenomenon caused by the meeting of positively charged clouds and negatively charged clouds.

Two conditions are required for current to flow through air:

First, clouds accumulate a lot of charges.

Second, the discharge path is smooth.

Why not in winter? Because:

1, there is little updraft in winter, so there is not much charge accumulation, and there is little chance of strong convective weather in winter.

2. The air humidity in winter is not as high as that in summer, and the humid air is easy to conduct electricity, so the clouds in winter are not easy to discharge.

Summer:

Strong convective weather requires warm and humid air to rise rapidly, and the rapidly rising air will produce strong friction.

In summer, the temperature near the ground tends to rise rapidly, so there are often strong convective weather-thunderstorms.

Why does it rain and thunder? Because rivers, lakes and oceans are illuminated by the sun, water becomes steam. Water vapor rises into small water droplets and finally becomes clouds. The water droplets or ice crystals that make up the cloud are supported by the airflow below, and the rising airflow continuously transports the water vapor below to the cloud. Small water droplets and small ice crystals in the cloud collide with each other in motion, and the volume will increase. The water droplets in the lower layer of the cloud gradually get bigger. After the volume of ice crystals in the upper layer of the cloud increases, they will fall between the water droplets in the lower part of the cloud, and the water droplets will become bigger and bigger. When these water droplets are too big for the updraft to contain them, it will rain.

Why does it thunder?

There are many air currents in the sky, and they are constantly moving. These air currents have some directions.

Run up, some run down, in different directions, at different speeds, some fast, some slow.

Slow down. The movement of airflow makes cumulus in the air move up and down. Friction between clouds makes clouds carry different kinds of charges. Because the same charges repel each other, they are positive and negative.

Charges gather at both ends of the cloud. The faster the air flows, the thicker the clouds, and the more electricity it carries. Cumulus clouds carry electricity.

To some extent, it will neutralize these two charges through air discharge. Because electricity will heat up when it passes through the air, it will make the air empty.

The gas expands rapidly and makes a loud noise. This is a transport mine.

If the charged cumulus is close to the ground, the charge on the ground will be different from that under the cloud due to electrostatic induction.

When the charge reaches a certain level, cumulus clouds will discharge to the ground, which is a ground mine prone to disasters.

Generally speaking, where there are protrusions on the ground, it is easy to discharge from there, so when we are in the wilderness, it will not work.

Take shelter from the rain under the big tree.

Why are there spring, summer, autumn and winter?

Why does the earth alternate between cold and summer and go to Qiu Lai in spring? The mystery is that the earth's axis of rotation has an inclination of 23 degrees and 27 minutes. When the northern hemisphere receives direct sunlight and is in midsummer, the southern hemisphere faces oblique sunlight and is in the middle of winter. Spring in the northern hemisphere corresponds to autumn in the southern hemisphere, and the two hemispheres get the same amount of sunshine. This is the origin of the four seasons. We call the latitude circle of 23 degrees and 27 minutes north latitude the Tropic of Cancer, and the latitude circle of 23 degrees and 27 minutes south latitude the Tropic of Cancer, which means that the sun shines directly to this limit, and then we start to turn around and return. The arctic circle and Antarctic circle will shine the sun for half a year, and the other half will fall into a long night. Because the earth's orbit around the sun is not a standard perfect circle, the southern hemisphere is slightly hotter than the northern hemisphere in summer and slightly colder in winter. Some researchers believe that the superposition effect of the earth axis change and the distance between the sun and the earth with a period of tens of thousands of years may be the macro reason for the formation of the ice age on the earth.

Why does it rain and thunder in summer? What if I'm afraid of thunder? Thunder is an atmospheric acoustic phenomenon, a sound wave formed by a shock wave generated by a strong explosion in a small area of the atmosphere, while lightning is a spark discharge phenomenon in the atmosphere. Lightning and thunder happen at the same time.

As long as we know the reason of thunder, there is nothing to be afraid of.

Why does it get dark and thunder when it rains? There are many air currents in the sky, and they are constantly moving. These air currents have some directions.