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As I understand, in deep mines on Earth the air pressure increases with depth. At what depth on Mars would the air pressure reach 14psi (97 kPa)?

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  • $\begingroup$ Why the particular interest in 14 psi??? $\endgroup$ Commented Apr 20, 2022 at 4:07

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The Mars Atmosphere Model web page by Nasa lists the equation for atmospheric pressure as,

$P = 0.699e^{-0.00009h}$

Where pressure, $P$ is in kilopascals and $h$ is height is in meters.

Rearranging the equation,

$h= - \frac{ln(\frac{P}{0.699})}{0.00009}$

For a pressure of 97 kPa,

$h= - \frac{ln(\frac{97}{0.699})}{0.00009} \ = \ -54\ 809 \ m \ = \ -54.8 \ km$

Which means the atmosphere would need to be 54.8 km below the surface of Mars to have a pressure of 97 kPa.

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