The reason why the tropospheric temperature decreases with the increase of altitude

The reason why the troposphere temperature decreases with the increase of height is that the direct heat source of troposphere temperature is ground radiation, so the higher it is from the ground, the less it is heated and the lower the temperature is.

Introduction to troposphere;

It refers to the atmosphere closest to the earth's surface and the lowest layer of the atmosphere, with the highest density, which contains almost 75% of the whole air quality, as well as almost all water vapor and aerosols. The troposphere is called troposphere because of the influence of different landforms such as forests and mountains, and the temperature change caused by sunlight, resulting in vertical and horizontal winds.

2. Air temperature in the troposphere:

In the troposphere, the temperature decreases with the elevation, with an average increase of 100 m, and the temperature decreases by about 0.65℃. The reason why the temperature decreases with the increase of altitude is that the main heat source of troposphere atmosphere is ground long-wave radiation. The higher off the ground, the less heated and the lower the temperature. However, under certain conditions, the temperature in the troposphere will also increase with the increase of height, which is the so-called "inversion phenomenon".

Due to the great influence of the surface, the horizontal distribution of meteorological elements is uneven. The regular vertical movement of air and the irregular turbulence are quite intense. The water vapor, dust and heat in the upper and lower layers are exchanged and mixed. Because more than 90% of water vapor is concentrated in the troposphere, many weather phenomena such as clouds, fog, rain and snow occur in the troposphere.

The difference between troposphere distribution and troposphere;

Tropospheric distribution:

The atmosphere is a whole composed of multiple layers of atmosphere. According to the change of temperature and height, it can be divided into troposphere, stratosphere, mesosphere, warm layer and escape layer from bottom to top. Among them, the troposphere is the closest layer to our life, where wind, rain, thunder and electricity all occur. The average thickness of the troposphere is about 12km.

Although it is relatively thin, its weight accounts for about 80% of the total atmosphere. The troposphere is also the most active layer in the atmosphere. In warm places, air will rise, in cold places, air will fall, and cold and warm air will form convection, which is why people call it troposphere.

Differences in the troposphere:

Although the atmosphere in the lower troposphere will rub against the surface, the air in the upper troposphere is not affected by this friction. Therefore, the weather phenomena in the upper and lower troposphere will be different. According to this phenomenon, the troposphere will be divided into three layers. The ground layer is from 0 m to 100 m, the Ekman layer is from 100 m to 1 km, and the free atmosphere is from 1 km to the tropopause.

The ground layer will be subjected to greater friction with the ground, so its atmospheric movement and surge are irregular and active. Ekman layer will be moved by three forces, Coriolis force, pressure tilt force and friction with the ground. As for the name free atmosphere, it is not affected by ground friction, and the atmosphere is in a state of free movement.