One reason is because there is very little water vapor. The other is because air in the stratosphere is stable. This means that there is no inherent tendency for it to rise, since temperature increases with altitude.
The air pressure in the stratosphere is low. This layer of the atmosphere is located above the troposphere where most of Earth's weather occurs, so it has less air concentration and lower pressure as you move higher in altitude.
The air pressure at the top of the stratosphere is very low, around 0.1 millibars, which is much lower than at the Earth's surface. It is where the Earth's atmosphere thins out and merges with space.
As you move from the troposphere to the stratosphere, the temperature typically increases due to the presence of the ozone layer which absorbs UV radiation. In the stratosphere, the jet stream and most weather phenomena occur, making it a region of significant atmospheric stability and less turbulence compared to the troposphere below.
The air pressure in the mesosphere is extremely low, typically less than 0.1% of the pressure at sea level. This region of the atmosphere is located between the stratosphere and thermosphere, with pressures decreasing significantly with altitude.
Air from the troposphere and stratosphere doesn't mix freely because of a layer called the tropopause, which acts as a barrier preventing the two layers from easily intermingling. The tropopause has different temperature and pressure characteristics that act as a boundary between the troposphere and stratosphere. This separation helps maintain the stability and structure of each layer.
Air pressure decreases as you move from the troposphere to the stratosphere. This is because the weight of the air above is less in the stratosphere, leading to lower air pressure at higher altitudes.
air pressure decreases
Low
About 1 millibar.
The air pressure in the stratosphere is low. This layer of the atmosphere is located above the troposphere where most of Earth's weather occurs, so it has less air concentration and lower pressure as you move higher in altitude.
The air pressure at the top of the stratosphere is very low, around 0.1 millibars, which is much lower than at the Earth's surface. It is where the Earth's atmosphere thins out and merges with space.
As you move from the troposphere to the stratosphere, the temperature typically increases due to the presence of the ozone layer which absorbs UV radiation. In the stratosphere, the jet stream and most weather phenomena occur, making it a region of significant atmospheric stability and less turbulence compared to the troposphere below.
The air pressure in the mesosphere is extremely low, typically less than 0.1% of the pressure at sea level. This region of the atmosphere is located between the stratosphere and thermosphere, with pressures decreasing significantly with altitude.
In the stratosphere, which extends from about 10 to 50 kilometers above the Earth's surface, air pressure decreases with altitude, averaging around 26 to 1.5 kPa (kilopascals) at its upper levels. Similarly, air density also decreases with height, falling from about 0.4 kg/m³ at the lower stratosphere to about 0.01 kg/m³ at the upper stratosphere. This layer is characterized by a temperature increase with altitude, primarily due to the absorption of ultraviolet radiation by the ozone layer.
Air from the troposphere and stratosphere doesn't mix freely because of a layer called the tropopause, which acts as a barrier preventing the two layers from easily intermingling. The tropopause has different temperature and pressure characteristics that act as a boundary between the troposphere and stratosphere. This separation helps maintain the stability and structure of each layer.
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The pressure in the stratosphere ranges from about 100 to 1 millibar. This corresponds to an altitude range of approximately 10 to 50 kilometers above sea level.