Observed changes to Martian surface caused by seasonal thawing of carbon dioxide ice

(Phys.org)—Spring is a dynamic season on the dunes surrounding Mars' north pole. When frozen carbon dioxide, or dry ice, deposited as a winter ice cap on Mars sublimates – changes directly from a solid to a gas – in the spring it causes a variety of geologic changes to the Martian surface, research led by Planetary Science Institute Senior Scientist Candice Hansen has shown.

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