How does the pressure in the troposphere, stratosphere and upper atmosphere change with the increase of altitude?

Three quarters of the atmospheric mass and almost all the water vapor and impurities are concentrated, and the thickness varies with latitude, and the thickness at low latitudes is about17 ~18 km; The mid-latitude thickness is about10 ~12 km; The thickness of high latitude is about 8~9 kilometers. The temperature decreases with the increase of height, the air convection movement is remarkable, and the weather phenomenon is complex and changeable.

2.stratosphere

There is a large amount of ozone layer that absorbs ultraviolet rays, and the height is from the tropopause to 50~55 kilometers. The temperature rises with the increase of altitude, the atmosphere is mainly advection, and the weather is fine, which is conducive to high-altitude flight.

3. Upper atmosphere

It is 2000~3000 kilometers from the stratosphere top. The air density is very small. The air pressure is very low and there is an ionosphere at high altitude. Conducive to radio communication.

Extended data:

The importance of the atmosphere to the earth

The atmosphere is the atmosphere around the earth, which is composed of nitrogen, oxygen, argon, neon, hydrogen, water vapor, carbon dioxide, ozone and other gases. Gas has almost no weight. These gases have been around the outside of the earth and will not spread into space. The fundamental reason lies in the gravity of the earth. With the gravity of the earth, the atmosphere is firmly attracted by the earth.

It is because of the existence of the atmosphere that harmful substances in the sun are filtered out! However, the most important thing is to adjust the temperature of the earth! If there is no atmosphere, then the temperature drop of the earth will be very huge! It may reach several hundred degrees during the day and drop to several hundred degrees below zero at night. Then this blue planet will cease to exist. Therefore, the atmosphere is an indispensable condition for the existence of the earth.