Why does the troposphere have higher pressure than the mesosphere?
The troposphere is the lowest layer of the atmosphere. It is also denser than the layers around it. That is because of all the weight compressing on it. The mesosphere has less weight compressing on it. The air at higher altitudes has less atmospheric pressure. This is because there are less air molecules, and also a lesser affect of gravity. The troposphere is close to Earth causing there to be more air molecules and a greater affect of gravity. Which makes the pressure higher.
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