How to Calculate the Mass of the Air in the Atmosphere
Shape: oblate spheroid
Note: 97% of the atmosphere's weight is found within 25 km of Earth's surface.
the volume of air:
Density = Mass/Volume
Important Note: With the density/height variation in mind we used a density averaged over the whole atmospheric layer under consideration -- zero to 25 km in this case. The density of air drops by a factor of 30 between the surface and 25 km altitude.
mass of air:
from the following:
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