The HiRISE teams says that the giant sand dunes in Kaiser Crater experience gully erosion of the steep slip faces every year in late winter as the sun warms these slopes and seasonal carbon dioxide frost sublimates (meaning it changes from a solid to gas). Kaiser Crater – and the field of giant dunes inside - has been a frequent target of study for HiRISE (see all the images here), so scientists have come to recognize the seasonal changes that take place at this ever-changing and shifting landscape. MRO has been orbiting Mars since 2006, and HiRISE has been snapping high-resolution images, showing the diversity of Martian surface. Erosion in Kaiser Crater on Mars, as seen by the HiRISE camera on the Mars Reconnaissance Orbiter.
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