Tag Archives: frost

HiRISE: Frosted valleys

Frosted valleys. Beautiful Mars series.

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THEMIS: Frost and south polar trough layers

THEMIS Image of the Day, June 26, 2017. Do you see what I see? Don’t be afraid, but it looks like a ghost! (THEMIS Art #133) More THEMIS Images of the Day by geological topic.

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THEMIS: South polar ice features

THEMIS Image of the Day, June 9, 2017. Today’s VIS image shows more of the south polar cap at the end of southern summer. More THEMIS Images of the Day by geological topic.

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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: A winter’s view of a gullied crater

This is the location with the most impressive known gully activity in the Northern hemisphere. Gullies are active in the winter due to carbon dioxide frost, but northern winters are shorter and warmer than southern winters, so there is less … Continue reading

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HiRISE: Gullies in winter shadow

This is an odd-looking image. It shows gullies during the winter while entirely in the shadow of the crater wall. Illumination comes only from the winter skylight. We acquire such images because gullies on Mars actively form in the winter … Continue reading

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HiRISE: Frosty alcoves on Kaiser Crater dunes

Kaiser Crater hosts a large field of sand dunes. Every winter the dunes are covered with a layer of seasonal carbon dioxide ice (dry ice). In early spring the ice begins to sublimate (going directly from solid ice to gas). … Continue reading

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Frosty nights year-round may stir Mars dust

Some dusty parts of Mars get as cold at night year-round as the planet’s poles do in winter, even regions near the equator in summer, according to new NASA findings based on Mars Reconnaissance Orbiter observations. [The findings are reported … Continue reading

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HiRISE: Frosted dunes

Sand dunes cover much of this terrain, which has large boulders lying on flat areas between the dunes. It is now late winter here in the Southern hemisphere, and these dunes are just getting enough sunlight to start defrosting their … Continue reading

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HiRISE: Southern winter frost accumulations

This enhanced color HiRISE image shows several craters somewhere in the southern mid-latitudes of Mars. It is currently mid-winter in the Southern hemisphere, so we can observe accumulating frost (neon blues) on pole-facing slopes (i.e. south-facing) and in shadowed areas. … Continue reading

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