Wondering how clouds are formed? How are clouds formed?

There are two basic conditions for the formation of clouds.

In the light, the river.

The evaporation of water surfaces such as rivers and oceans, and the foliage of plants produces a large amount of water vapor. Affected by the temperature of the atmosphere below the boiling point of the water surface, the water vapor content changes greatly in the atmosphere, thus showing various forms, and clouds are one of these forms.

In the atmosphere from the ground upwards, the closer to the ground, the higher the temperature and the denser the air; Conversely, the higher you go, the cooler the temperature and the thinner the air. When water vapor enters the atmosphere.

As the altitude increases, the thinner the air becomes, and the lower the air pressure, the rising water vapor expands due to the decrease in volume and the increase in specific gravity.

Since the expansion of water vapor consumes its own heat, the temperature in the rising air decreases. As the temperature decreases, the ability of the atmosphere to hold water vapor becomes less and less. When the temperature drops to a certain level, the air is saturated with water vapor.

At this time, if the air continues to rise, excess water vapor will precipitate.

When the temperature in the atmosphere is higher than 0 during the rise of water vapor, the excess water vapor will condense into small water droplets. When the temperature is below 0, the excess water vapor is condensed into Xiaoice crystals.

When these small water droplets and Xiaoice crystals gradually increase and "come together" together to reach a certain number, a cloud is formed that can be seen through the naked eye.

In addition to the two basic conditions of sufficient water vapor and air cooling, there is also one of the most critical factors, which is "condensation nuclei".

If the air is free of any impurities and is absolutely pure, the water vapor molecules in the atmosphere cannot attach to the condensation nuclei.

The "adhesion" between individual water vapor molecules in the atmosphere is very small, and due to the limited ability to merge with each other, they are finally "together" together and then "separated". Even the small fraction of water vapor molecules that come together by eliminating all odds will be so small that the small droplets will evaporate rapidly. Therefore, their efforts can be described as "all the work they have done".

The atmosphere contains a large number of particles, typically dust, as well as a large number of tiny particles such as salt and smoke particles, which are called "condensation nuclei".

Condensation nuclei play a particularly critical role in the formation of clouds. It not only condenses and gathers a large amount of water vapor, but also makes them attach to itself.

As a result of the condensation nucleus, a large number of water vapor molecules that collide and join together are finally "agglomerate", and they "break into wholes" to form clouds of different sizes.

Classification of clouds:

In terms of morphology, there are three main types of clouds, namely cumulus clouds.

Stratus and Cirrus.

In terms of height, the clouds are divided into three cloud families, namely the high cloud family, the medium cloud group and the low cloud group.

There is also a special division that will be the cumulonimbus cloud.

Divided from the low cloud family, it is called the straight cloud family.

The above content refers to the China Meteorological Administration - How clouds are formed.

When the sun shines on the Earth's surface, the water evaporates to form water vapor, and once the water vapor is supersaturated, water molecules collect around the dust (condensation nuclei) in the air, and the resulting water droplets or ice crystals scatter sunlight in all directions, which gives the appearance of clouds. In addition, clouds can take on a variety of shapes, and they are divided into many types depending on the height and shape of the sky.

Long-term observation and practice have shown that the generation and dissipation of clouds, as well as the evolution and transformation between various types of clouds, are carried out under certain conditions of water vapor and atmospheric movement. People can't see water vapor and can't see atmospheric movements, but they can see every move of water vapor and atmospheric movement from the evolution of clouds, and water vapor and atmospheric movement play an extremely important role in weather phenomena such as rain, snow, ice, and hail.

As follows:

When the air mass rises to the initial condensation height and encounters the high-level cold air, the water vapor liquefies in cold and liquefies, and the cloud body with white color appears, and the heat released by the liquefaction will make the cloud body further lift, and the cloud is formed.

Classification of clouds:Clouds can be broadly divided into three main categories, a large mass of Cumulus, a large patch of Stratus, and fibrous Cirrus.

The classification of clouds was first proposed by the French naturalist Lamarck in 1801. In 1929, the International Meteorological Organization divided clouds into ten major cloud genera according to their shape and genesis: Cirrus, Cirrostratus, Cirrocumulus, Altostratus, Stratus, Stratocumulus, Nimbostratus, Cumulus and Cumulonimbus, and divided into three major cloud families according to their cloud base height (applicable to mid-latitudes).

High, medium and low clouds.