While the composition of the mesosphere is similar to the other layers, the same gases are present in much lower concentrations. This is due to the gradual decrease in air density with increasing altitude. The major gases present in the mesosphere are:
* Nitrogen (N2): This is the most abundant gas in the mesosphere, making up around 78% of the atmosphere.
* Oxygen (O2): This gas is present in a concentration of around 21%.
* Argon (Ar): This is the third most abundant gas in the mesosphere, making up around 0.9%.
* Carbon dioxide (CO2): This gas is present in very small amounts, but its concentration is increasing due to human activity.
* Other gases: There are also trace amounts of other gases present in the mesosphere, such as helium, neon, and hydrogen.
It's important to note that the mesosphere is extremely thin and contains very little gas overall. So while these gases are present, their concentrations are significantly lower than in the lower layers of the atmosphere.
