Tag Archives: frost

HiRISE: Lingering frost

Posted on June 28, 2018 by rburnham

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 →

Posted in Reports | Tagged Beautiful Mars, frost, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, north polar layered deposits, scarps, University of Arizona | Comments Off

HiRISE: Of dunes and their stories

Posted on June 18, 2018 by rburnham

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

Posted in Reports | Tagged Arrakis, Beautiful Mars, dunes, frost, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, north polar region, north polar sand sea, sand dunes, University of Arizona | Comments Off

HiRISE: Gullies of Matara Crater

Posted on April 6, 2018 by rburnham

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 →

Posted in Reports | Tagged dune gullies, dunes, frost, gullies, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, Matara Crater, MRO, NASA, sand dunes, University of Arizona | Comments Off

HiRISE: Seasonal frost on crater slopes

Posted on March 9, 2018 by rburnham

Seasonal frost on crater slopes. Beautiful Mars series.

Posted in Reports | Tagged Beautiful Mars, CO2 frost, defrosting, frost, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, northern lowlands, northern plains, University of Arizona | Comments Off

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 →

Posted in Reports | Tagged Abolos Undae, Arizona State University, ASU, barchan dunes, CO2 frost, defrosting, dunes, frost, Jojutla Crater, Mars Odyssey, NASA, north polar sand sea, Olympia Undae, sand dunes, Siton Undae, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, transverse dunes | Comments Off

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 →

Posted in Reports | Tagged Abolos Undae, Arizona State University, ASU, barchan dunes, CO2 frost, defrosting, dunes, frost, Mars Odyssey, NASA, north polar sand sea, Olympia Undae, sand dunes, Siton Undae, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, transverse dunes | Comments Off

HiRISE: Defrosting dunes

Posted on December 7, 2017 by rburnham

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

Posted in Reports | Tagged Beautiful Mars, CO2 frost, defrosting, dunes, frost, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, north polar region, north polar sand sea, sand dunes, University of Arizona | Comments Off

Creepy stuff: possible solifluction on Mars

Posted on November 30, 2017 by rburnham

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 →

Posted in Reports | Tagged frost, ground ice, mass wasting, periglacial processes, periglacial terrain, soil, solifluction | Comments Off

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

Posted on September 20, 2017 by rburnham

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 →

Posted in Reports | Tagged Arizona State University, ASU, defrosting, dunes, Escorial Crater, frost, Mars Odyssey, NASA, northern lowlands, northern plains, sand dunes, sand sea, sand sheet, Siton Undae, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System | Comments Off

THEMIS: Basaltic dunes and frost in north polar lowlands

Posted on September 19, 2017 by rburnham

THEMIS Image of the Day, September 19, 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 →

Posted in Reports | Tagged Arizona State University, ASU, basaltic sand, defrosting, dunes, Escorial Crater, frost, Mars Odyssey, NASA, northern lowlands, northern plains, sand dunes, sand sea, sand sheet, Siton Undae, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System | Comments Off

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