What are the main features of the stratosphere?

The main characteristics of the stratosphere are: the temperature in the lower stratosphere is not easy to change, and the temperature in the upper stratosphere increases with the height, because the upper stratosphere absorbs ultraviolet rays; Stratospheric air is stable, vertical mixing motion is obviously weakened, and atmospheric motion is mostly horizontal; The stratosphere has good transparency, less clouds, less water vapor and less dust.

Classification and function of atmosphere:

Atmosphere is a common term in meteorology, which refers to the mixed gas outside the earth. This gas will surround land and sea, and its thickness is about several meters above Qian Qian. It is mainly divided into troposphere, mesosphere, stratosphere and warm layer.

The atmosphere is mainly composed of nitrogen, argon and oxygen, but it is unstable and will be affected by natural activities and human activities. Stimulated by ultraviolet rays, oxygen molecules will form ozone, protect the living things on the earth, avoid the influence of strong ultraviolet rays on the earth, keep the earth warm at the same time, and avoid the excessive temperature difference between day and night. The atmosphere is the basic condition for all kinds of living things. If there is an atmosphere, the temperature difference between day and night will not be great, and the atmosphere is also the last barrier to protect the earth.

At the same time, the atmosphere also maintains the circulation of the hydrosphere. Every day, a large amount of water is evaporated into steam after being irradiated by sunlight. The atmosphere can rain or snow, and the water returns to the earth. The atmosphere can also ensure that the earth does not lack oxygen. Under the protection of the atmosphere, oxygen will not diffuse out of the surface, which can constitute a favorable oxygen supply and ensure the fluctuation of landmark environment. Experts point out that tens of millions of tons of pebbles will enter the earth every day, which will reduce the damage to the earth's surface fluctuation after atmospheric friction. At the same time, it will also produce some gases necessary for human life, and make the surface temperature of the earth not too high or too low, which can greatly avoid the situation of excessive surface water loss and water shortage. Some natural weather is produced in the atmosphere, which is an important part of the water cycle. If there were no atmosphere, there might be no life on the earth. Rivers and some water will evaporate, and the loss of magnetic field protection will make the earth a desert planet.