How does the snow come from? Where does the snow come from?

In a water cloud, the cloud droplets are all small droplets. They mainly grow into raindrops by continuing to condense and colliding with each other. Ice clouds are made up of tiny ice crystals.

When these Xiaoice crystals collide with each other, the surface of the ice crystals will heat up and melt somewhat, and they will stick to each other and freeze again. This is repeated many times, and the ice crystals increase. In addition, there is also water vapor in the clouds, so the ice crystals can continue to grow by condensation.

However, ice clouds are generally very high and not thick, where there is not much water vapor, and the growth of condensation is very slow, and there are not many opportunities for collisions with each other, so they cannot grow to a large size and form precipitation. Even if precipitation is caused, it tends to evaporate on the way down and rarely reaches the ground. The most conducive to cloud growth is hybrid cloud.

Hybrid clouds are made up of Xiaoice crystals and supercooled water droplets. While a mass of air is said to be saturated with ice crystals, it is not yet saturated with water droplets. At this time, the water vapor in the cloud condenses on the surface of the ice crystals, but the supercooled water droplets are evaporating, and ice crystals are generated from the supercooled water droplets"Adsorption"The phenomenon of water vapour.

In this case, the ice crystals grow quickly. In addition, supercooled water is very unstable. As soon as you touch it, it freezes.

Therefore, in a hybrid cloud, when supercooled water droplets collide with ice crystals, they freeze and stick to the surface of the ice crystals, causing them to grow rapidly. When the Xiaoice crystals grow large enough to overcome the resistance and buoyancy of the air, they fall to the ground, which is called snowflakes. In early spring and late autumn, the air near the ground is above zero, but this layer of air is not thick and the temperature is not very high, so that the snowflakes will fall to the ground before they have time to melt completely.

This is called a descent"Wet snow", or"Rain and snow fall together"。This phenomenon is called "sleet" in meteorology.

Water liquefies to form water vapor, and a large amount of water vapor gathers in the high air to form clouds, and the clouds directly rise into Xiaoice droplets when they encounter cold air.

Formation. Snow is formed by direct condensation of water vapor from the atmosphere. The low temperature in the clouds causes the water vapor to form ice crystals, and when the temperature is low enough, the ice crystals fall to the ground and are still snowflakes, which is snow. Snow absorbs heat as it melts, so the ground air temperature will be lower when it melts than when it snows.

Snow forms under the condition that the atmosphere contains cold ice crystal nuclei, sufficient water vapor, and a temperature below 0 (freezing).

Briefly. Snow is a form of precipitation, which is crystalline solid ice that falls from clouds, often in the form of snowflakes. Snow is made up of small ice particles and is a granular material that has an open structure and therefore appears soft.

Because of the different temperatures and humidity, the snowflakes that form come in a variety of shapes and sizes. If the snow melts and then freezes again during the landing, it will form a ball of snow, which can be hazel, graupel, and hail.

Categories: Life.

Problem Description: I don't know who can tell me.

Analysis: The water vapor on the ground evaporates and gradually rises, accumulating in the sky to form a cloud. At this time, the water vapor in the cloud is smaller and lighter, and the cloud layer is higher.

When the water vapor collects more and more, it encounters small particles such as dust in the air, and the water vapor will cover it, and when these water vapor accumulates, the clouds will become thicker and thicker, and the cloud cover area will become larger and larger, and the cloud layer will be lower and lower, so that cumulonimbus clouds will be formed. When the water vapor collects to a certain extent, it becomes small water droplets. When the clouds can't hold these small droplets, they become raindrops.

This is the rain. When the water vapor accumulates more and more, encountering small particles such as dust in the air, if the temperature of the collapse fiber is low, below zero, it will become Xiaoice crystals. The larger these Xiaoice crystals become, the more they turn into snowflakes. When the clouds can't hold these snow balls shiny like flowers, they fall down.

This is snow.