Tag Archives: CO2 ice

HiRISE: Dust and frost

Sand dunes in the north polar regions of Mars show light coatings of pale orange dust blown partially across the dark basaltic sand. Around the edges of the dunes, patches of seasonal dry ice remain. These patches will be gone … Continue reading

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HiRISE: Patches of snow

The North Pole of Mars is surrounded by a vast sea of sand dunes. In this dune field, the dunes are covered by a seasonal cap of dry ice in the winter. In early Martian summer, at the time we … Continue reading

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HiRISE: On the intricacies of carbon dioxide ice

On the intricacies of carbon dioxide ice. Measuring the mass balance of what we call the residual South Polar cap (RSPC) has important climatic implications. This image was requested to detect any vertical changes compared to earlier observations. Beautiful Mars … Continue reading

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HiRISE: Seasonal haloes and fractals

Seasonal haloes and fractals. In the spring, as the winter layer of dry ice covering the polar regions sublimates, there is a lot of action. The ice layer cracks and ruptures, and escaping gas lofts sand from the dunes above … Continue reading

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Martian winters are shaping the landscape

Researchers based millions of kilometres from Mars have unveiled new evidence for how contemporary features are formed on the Red Planet. Their innovative lab-based experiments on carbon dioxide (CO2) sublimation – the process by which a substance changes from a … Continue reading

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HiRISE: Squiggles in Hellas Planitia

At around 2,200 kilometers in diameter, Hellas Planitia is the largest visible impact basin in the Solar System, and hosts the lowest elevations on Mars’ surface as well as a variety of landscapes. This image covers a small central portion … Continue reading

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HiRISE: A world of snowy dunes

It is spring in the Northern hemisphere when we took this image. Over the winter, snow and ice have inexorably covered the dunes. Unlike on Earth, this snow and ice is carbon dioxide, better known to us as dry ice. … Continue reading

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HiRISE: Spider terrain

Spider terrain. Beautiful Mars series.

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THEMIS: South polar textures as local summer ends

THEMIS Image of the Day, June 8, 2017. This VIS image of the south pole was taken at the end of summer. Frost will soon start to form as the season transitions into fall. Fall in the southern hemisphere means … Continue reading

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HiRISE: Lace on Mars

Some seasonal ice on Mars is transparent so that the sunlight penetrates to the bottom of the ice. Heat from this sunlight can turn the ice directly into a gas in a process called sublimation and this gas can scour … Continue reading

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