Earth’s atmospheric layers and how they change depending on the timing of the day
There's many different layers to the Earth's atmosphere, but 75% of Earth's mass is actually going to be residing in the troposphere, where we are located.

Also, we see all of Earth's weather occur in this layer of the atmosphere. When looking at the different layers, you can see the thickness really starts to range, as you get higher up these layers going to be looking thicker. At the bottom of these layer where the troposphere lies, it's actually not that thick.
Around Mid-Missouri, we're anywhere from about 0-10 miles for the thickness. That's where all that cloud covers, helicopters, and some planes fly. Many planes fly just a tad bit above that into the stratosphere where the ozone layer is going to be. That's going to be anywhere from 11 to 31 miles for the actual atmosphere.

As we continue to climb up, we are going to be seeing less oxygen into these upper layers, but the troposphere can actually change as we head throughout the year and even throughout the daytime and nighttime hours.
During the day, the troposphere is at its thickest point. This is because of the rising motions in the air due to the incoming solar radiation from the sun heating their surface. At night, this layer will compress more since a thermal rising energy is no longer available, causing more sinking motions.