Headlines > News > Picture of the Day - A Burst of Spring

Picture of the Day - A Burst of Spring

Published by Matt on Tue Mar 23, 2010 5:43 pm via: NASA
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Spring has sprung on Mars, bring with it the disappearance of carbon dioxide ice (dry ice) that covers the north polar sand dunes. In spring, the sublimation of the ice (going directly from ice to gas) causes a host of uniquely Martian phenomena.

Spring has sprung on Mars. Credit: NASA/JPL-Caltech/University of Arizona

Spring has sprung on Mars. Credit: NASA/JPL-Caltech/University of Arizona

In this image streaks of dark basaltic sand have been carried from below the ice layer to form fan-shaped deposits on top of the seasonal ice. The similarity in the directions of the fans suggests that they formed at the same time, when the wind direction and speed was the same. They often form along the boundary between the dune and the surface below.

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