How many floors are there in the sky?

Five floors. They are troposphere, stratosphere, mesosphere, ionosphere and outer layer.

1, troposphere

The average thickness is about 12km, and its thickness varies from 8km above the poles of the earth to 17km above the equator. It is the densest layer in the atmosphere, where about 75% of the air quality and more than 90% of the water vapor quality are concentrated.

2.stratosphere

The stratosphere is located at a height of 10 ~ 50km above the surface. Located above the troposphere and below the escape layer. Stratosphere, also called stratosphere, is a layer of hot and cold material in the earth's atmosphere. This layer is divided into different temperature layers, the high temperature layer is above and the low temperature layer is below.

3. Intermediate layer

The atmosphere between the stratosphere top and 85 kilometers. The ozone content in this layer is low, and most of the solar short-wave radiation directly absorbed by nitrogen and oxygen energy has been absorbed by the upper atmosphere, so the vertical temperature drop rate is large and the convection movement is strong.

4. Ionosphere

It is about 10 ~ 80km away from the earth's surface, and the atmosphere over 60km of the whole earth is in a state of partial ionization or complete ionization. The ionosphere is a partially ionized atmospheric region called magnetosphere.

5. Outer layer

To a distance of 1000 km from the earth's surface. The temperature here is very high, reaching several thousand degrees; The atmosphere is extremely thin, and the density is one billionth of the sea level.

Extended data

Sky form: The sky has various forms of expression, which carries the fastest light known by human beings and is the most primitive creative enlightener of human beings. Various forms are usually expressed by weather, which refers to the specific state of the near-surface atmosphere in a short time.

Weather phenomenon refers to various natural phenomena in the atmosphere, that is, the comprehensive expression of the spatial distribution of various meteorological elements in the atmosphere (such as temperature, pressure, humidity, wind, clouds, fog, rain, flash, snow, frost, thunder, hail, haze, etc.). ) in an instant.

The combination of many weather systems constitutes a large-scale weather situation and hemispheric and even global atmospheric circulation. The weather system is always in the process of rebirth, development and extinction, and there are corresponding weather phenomena in different development stages.

Baidu encyclopedia-atmosphere

Baidu Encyclopedia-Sky