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Posted on June 2, 2023 (Updated on July 9, 2025)

Exploring the Subterranean Air Pressure of Mars: Implications for Future Missions

Space & Navigation

When it comes to exploring Mars, much of the attention is focused on the planet’s surface. But scientists have also been studying what lies beneath the Red Planet’s surface. One area of particular interest is the subsurface atmosphere of Mars, which could have important implications for future human missions to the planet.

The Martian atmosphere: A brief overview

Before delving into the subsurface atmosphere of Mars, it’s worth taking a moment to consider the planet’s atmosphere as a whole. Mars has a thin atmosphere compared to Earth, with a surface pressure that’s about 1% of Earth’s atmospheric pressure at sea level. The Martian atmosphere is composed primarily of carbon dioxide, with traces of other gases such as nitrogen and argon.

The Martian atmosphere is also subject to seasonal variations, with large dust storms that can cover the entire planet and cause changes in air pressure. These storms are more common during the southern hemisphere summer and can have a significant impact on the Martian climate.

Exploring the subsurface atmosphere of Mars

Although the Martian atmosphere is thin, it still exerts some pressure on the planet’s surface. However, scientists have discovered that the air pressure below the surface of Mars can be significantly higher than the surface pressure. This is due to a number of factors, including the fact that the pressure of the Martian atmosphere increases with depth.

There is also evidence that there are pockets of air trapped beneath the Martian surface that can have even higher pressures than the surface atmosphere. These air pockets can be created by a number of processes, including volcanic activity and the sublimation of subsurface ice.

Implications for future missions

The discovery of a subsurface atmosphere on Mars has important implications for future human missions to the planet. One of the greatest challenges facing a human mission to Mars is the need to provide a breathable atmosphere for the crew. If the subsurface atmosphere on Mars is found to be thick enough to support human life, it could significantly reduce the amount of equipment and supplies needed for a manned mission.
Another potential use of the Martian subsurface atmosphere is the production of rocket fuel. Carbon dioxide, which makes up most of the Martian atmosphere, can be converted to methane through a process known as the Sabatier reaction. This methane could then be used to fuel rockets, allowing more efficient exploration of the planet.

Conclusion

The subsurface atmosphere of Mars is an area of ongoing research, with scientists still working to understand the processes that create and maintain pockets of air beneath the planet’s surface. However, the discovery of a subsurface atmosphere has important implications for future human missions to Mars and could play a key role in enabling long-term exploration of the Red Planet.

FAQs

What is the surface pressure on Mars?

The surface pressure on Mars is around 1% of Earth’s atmospheric pressure at sea level.

What is the composition of the Martian atmosphere?

The Martian atmosphere is primarily composed of carbon dioxide, with traces of other gases such as nitrogen and argon.

Why is the air pressure below the surface of Mars higher than at the surface?

The air pressure below the surface of Mars can be significantly higher due to a number of factors, including the fact that the pressure of the Martian atmosphere increases with depth.

What creates pockets of air beneath the Martian surface?

Pockets of air can be created by a number of processes, including volcanic activity and the sublimation of subsurface ice.

How could the subterranean atmosphere on Mars be used for future missions?

The subterranean atmosphere on Mars could be used to provide a breathable atmosphere for manned missions, or to produce rocket fuel through the conversion of carbon dioxide into methane.

What challenges would a manned mission to Mars face in terms of providing a breathable atmosphere?

One of the biggest challenges facing a manned mission to Mars is the need to provide a breathable atmosphere for the crew. If the subterranean atmosphere on Mars is not thick enough to support human life, significant amounts of equipment and supplies would be needed to create a habitable environment.

What is the significance of the discovery of a subterranean atmosphere on Mars?

The discovery of a subterranean atmosphere on Mars has important implications for future manned missions to the planet, and could play a key role in enabling long-term exploration of the Red Planet.

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