How do low-feeling clouds form?

First, moist water vapor will form clouds. The drier the weather, the lower the temperature of forming clouds. Generally, the higher the altitude, the lower the temperature, so the drier the weather, the higher the cloud height. When the temperature is very low, the wet water vapor will freeze the crystals, and the density of ice is lower than that of water, so the height of clouds formed by ice crystals is higher than that formed by water droplets.

When the weather is good, the sky will form clouds of different heights, with cirrus clouds formed by ice crystals above and water droplets below. Cumulonimbus clouds will form when the weather is bad. There is a strong updraft inside, with water droplets below and ice crystals above. At this time, people should take an umbrella when they go out.

Clouds floating in the sky are made up of many tiny water droplets or ice crystals, some of which are mixed together. Sometimes it also contains some big raindrops and ice particles. The bottom of the cloud does not touch the ground and has a certain thickness.

The formation of clouds is mainly caused by water vapor condensation. As we all know, the closer to the ground, the higher the temperature in the atmosphere more than 10 kilometers from the ground, and the denser the air. The higher the altitude, the lower the temperature and the thinner the air.

On the other hand, the water surface of rivers, lakes and seas, as well as the moisture of soil, animals and plants, evaporate into the air at any time and become water vapor. After water vapor enters the atmosphere, it turns into clouds to cause rainfall, or condenses into frost dew, and then returns to the ground, permeates the soil or flows into rivers, lakes and seas. Later evaporation (sublimation) condensation (condensation) drops. It goes on and on.

Extended data:

Clouds are mainly divided into two categories-cumulus clouds and stratocumulus clouds. Cumulus clouds include cirrocumulus, altocumulus, cumulonimbus and cumulus, and stratocumulus clouds include cirrostratus, altocumulus, nimbostratus, stratocumulus and stratocumulus.

Cumulus:

Cirrocumulus: It indicates an unstable weather system and stormy weather. The agricultural proverb "Fish-scale sky, even if it doesn't rain, the wind will jump" refers to such a cloudy day. ?

Cumulus: It indicates good weather, but it covers a wider area, with thicker clouds and dark white. It usually appears after heavy rain and is suspended at an altitude of 5 000~6 000 meters.

Cumulonimbus: It's a low-level Lei Yun with dark clouds. Cumulonimbus clouds often bring strong storms and lightning. The upper layer resembles a false cirrus cloud and the top layer resembles a false rain cloud.

Cumulus: It is easy to identify, fluffy white clouds, like floc, floating in the air. If we are separated, it will mean another beautiful sunny day, but if it gets bigger and bigger and there are more and more front ends, it is likely to bring a sudden rainstorm. Cumulus clouds in the blue sky at sea usually indicate that they are not far from land, and the height is generally not more than 2500 meters.

Stratocumulus:

Cirrostratus: It is made of ice particles and looks like white clouds. These are the only clouds that glow around the sun or the moon. If cirrostratus expands, it means the weather is fine; If cirrostratus shrinks, it means it will rain; If the sky is covered with cirrus clouds, the sky above the cirrus clouds will darken and gradually form a cirrocumulus, which indicates the coming of rain and snow.

High-level cloud: It looks like a gray curtain in the sun or moonlight. If wet air approaches, the cloud disk disappears and the clouds become thicker and darker until it rains.

Nimbostratus: It's a low-level dark cloud hanging in the air, which means it will rain within 4 hours, usually lasting for several hours.

Stratocumulus: A low-level tiled cloud that usually covers the whole sky. Clouds are thin and sunlight can pass through. They may bring thunderstorms, but they usually disappear in the afternoon, leaving a clear and bright blue sky. The height is less than 2500 meters.

Stratus clouds: clouds are the lowest, hanging in the air like dense fog. When they first appeared, they were often mistaken for mountain fog. They are not natural rain clouds, but they can also form Mao Mao rain. If it gets thicker and thicker at night and covers the morning sky, it will usually be sunny and the height will not exceed 2500 meters.

(Note: Troposphere: The height range from the surface to 8 to 15 km is called troposphere)

References:

Baidu Encyclopedia-Cloud