Tag Archives: CO2 frost

HiRISE: Seasonal frost on crater slopes

Posted on March 9, 2018 by rburnham

Seasonal frost on crater slopes. Beautiful Mars series.

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

Posted on March 8, 2018 by rburnham

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

Posted on March 7, 2018 by rburnham

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: Fall in the Hellas Basin

Posted on January 17, 2018 by rburnham

Fall in the Hellas Basin. We took this image during the Martian fall in the Southern Hemisphere, in the giant impact crater known as Hellas Basin where small boulders cast long shadows. The long shadows emphasize small scale topographic features. … Continue reading →

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HiRISE: Defrosting dunes

Posted on December 7, 2017 by rburnham

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

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HiRISE: Defrosting dunes within Chasma Boreale

Posted on October 26, 2017 by rburnham

This image shows a dune field in Chasma Boreale, which is a large trough that cuts into the North Polar ice cap. Some of the dunes in this image are quite long and sinuous with a slight bulge at one … Continue reading →

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THEMIS: Frosty dunes in Siton Undae

Posted on September 18, 2017 by rburnham

THEMIS Image of the Day, September 18, 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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HiRISE: A world of snowy dunes

Posted on August 23, 2017 by rburnham

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: Frosted valleys

Posted on July 6, 2017 by rburnham

Frosted valleys. Beautiful Mars series.

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THEMIS: Frost and south polar trough layers

Posted on June 26, 2017 by rburnham

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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