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Tag Archives: polar troughs
THEMIS: North polar layers and sand dunes
THEMIS Image of the Day, July 23, 2019. Today’s VIS image shows part of the north polar cap, as well as sand dunes located on the floor of a polar trough. The north polar cap is surrounded by numerous dune … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Mars Odyssey, NASA, north polar ice cap, north polar layered deposits, north polar sand sea, polar troughs, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Polar winds streaming off the ice cap
THEMIS Image of the Day, April 5, 2018. This VIS image shows ‘streamers’ of clouds created by katabatic winds at the north polar cap. Katabatic winds are created by cold air sinking at the pole and then speeding along the … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, clouds, katabatic winds, Mars Odyssey, NASA, north polar ice cap, polar troughs, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Trough in south polar ice cap
THEMIS Image of the Day, September 22, 2016. This VIS image shows part of a depression (or trough) on the polar cap. More THEMIS Images of the Day by geological topic.
Posted in Reports
Tagged Arizona State University, ASU, Mars Odyssey, NASA, polar troughs, south polar ice cap, Swiss-cheese terrain, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Polar trough
THEMIS Image of the Day, December 5, 2014. This VIS image shows one of many troughs located on the south polar cap. More THEMIS Images of the Day by geological topic.
Posted in Reports
Tagged Arizona State University, ASU, ice, ice cap, katabatic jump, Mars Odyssey, NASA, polar troughs, south polar ice cap, THEMIS, Thermal Emission Imaging System
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Spiral troughs in Mars polar caps are born in ‘cyclic steps’
Both Martian polar caps have deep spiral troughs that slice into them for dozens or hundreds of kilometers, but their origin and development has been much debated by scientists. New work by a team of researchers led by Isaac Smith … Continue reading
Posted in Reports
Tagged atmosphere, cyclic steps, ice, katabatic jump, katabatic winds, Mars Reconnaissance Orbiter, north polar ice cap, polar caps, polar regions, polar troughs, Shallow Radar, SHARAD, south polar ice cap, sublimation, water, water vapor
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