Compositio2 - Composition Mars thin atmosphere visible on...

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Unformatted text preview: Composition Mars' thin atmosphere, visible on the horizon in this low orbit image. Carbon dioxide The main component of the atmosphere of Mars is carbon dioxide ( CO 2 ). During the Martian winter the poles are in continual darkness and the surface gets so cold that as much as 25% of the atmospheric CO 2 condenses at the polar caps into solid CO 2 ice ( dry ice ). When the poles are again exposed to sunlight during the Martian summer, the CO 2 ice sublimates back into the atmosphere. This process leads to a significant annual variation in the atmospheric pressure and atmospheric composition around the Martian poles. Argon The atmosphere of Mars is enriched considerably with the noble gas argon , in comparison to the atmosphere of the other planets within the Solar System . Unlike carbon dioxide , the argon content of the atmosphere does not condense, and hence the total amount of argon in the Mars atmosphere is constant. However, the relative concentration at any given location can change as atmosphere is constant....
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Compositio2 - Composition Mars thin atmosphere visible on...

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