Tag Archives: frost

HiRISE: Scarp monitoring

Scarp monitoring. The “blue” in enhanced color could be seasonal frost or perhaps ground ice. We’ll be monitoring this site for one Mars year (two Earth years) to see any changes that helps us figure out what kind of ice this … Continue reading

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HiRISE: Lingering frost

Lingering frost. The North Polar layered deposits comprise a thick stack of icy layers. Part of this image has lingering seasonal frost, which serves to accentuate those layers.  An additional rationale for this observation is to document new activity in … Continue reading

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HiRISE: Of dunes and their stories

Of dunes and their stories. So far no seasonal changes have been detected here, making this site unique. Beautiful Mars series. [More at links]

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HiRISE: Gullies of Matara Crater

Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years. The flows typically occur when seasonal frost is present. Here, we see frost in and around two gullies, … Continue reading

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HiRISE: Seasonal frost on crater slopes

Seasonal frost on crater slopes. Beautiful Mars series.

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THEMIS: Dunes don’t climb hills (very far)

THEMIS Image of the Day, March 8, 2018. This VIS image of Olympia Undae was collected during north polar spring. The crests of the dunes and other surfaces are light colored, indicative of a frost covering. At the top right … Continue reading

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THEMIS: Defrosting dunes in Olympia Undae

THEMIS Image of the Day, March 7, 2018. This VIS image of Olympia Undae was collected early in north polar spring. The crests of the dunes are light colored, indicative of a frost covering. As the season changes into summertime, … Continue reading

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HiRISE: Defrosting dunes

Defrosting dunes. They’re melting! They’re melting! Beautiful Mars series.

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Creepy stuff: possible solifluction on Mars

Planetary Geomorphology Image of the Month, November 30, 2017: Andreas Johnsson (University of Gothenburg, Sweden). Small-scale lobes on Mars (Fig. 1) are tens to hundreds of meters wide and consist of an arcuate frontal riser that is a meter to … Continue reading

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THEMIS: “Dry spots” in the north polar sand sea

THEMIS Image of the Day, September 20, 2017. Siton Undae is a large dune field located in the northern plains near Escorial Crater. Siton Undae is west of the crater and is one of three dune fields near the crater. … Continue reading

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