Tag Archives: south polar ice cap

HiRISE: Dramatic changes over the south polar cap

The south polar residual cap of carbon dioxide ice rapidly changes. This image was planned as an almost exact match to the illumination and viewing angles of a previous one we took in August 2009. The pits have all expanded … Continue reading

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THEMIS: Eroded layers in the south polar ice cap

THEMIS Image of the Day, March 21, 2019. This VIS image shows layering in the south polar cap. Such layers are laid down by the seasonal changes and interweave dust and ice. Then they are eroded by winds and seasonal … Continue reading

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THEMIS: Wood-grain patterns in ice and dust

THEMIS Image of the Day, March 20, 2019. This VIS image shows layering in the south polar cap. The layers are formed over thousands of years of seasonal change, reflecting ice and dust surface deposition. Where the layers appear close … Continue reading

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HiRISE: Everything is (well) illuminated

The south polar layered deposits are icy layers that have been deposited over millions of years, preserving a climate history of Mars. In this image the layers are well illuminated to accentuate the topography. A prior image of this location … Continue reading

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THEMIS: South polar ice cap layers

THEMIS Image of the Day, March 15, 2019. This VIS image is located on the South Polar cap. The linear features are the steep side of a polar trough. At troughs the extensive layering of the ice is exposed. The … Continue reading

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Lake under south polar ice cap requires local heat source

Thermal modeling suggests that active magmatism in the past few hundred thousand years could account for the presence of a large lake previously hypothesized beneath the Red Planet’s southern ice cap. Liquid water appears to be a fundamental requirement for … Continue reading

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Volcanism under the south pole ice cap of Mars?

A study published last year in the journal Science suggested liquid water is present beneath the south polar ice cap of Mars. Now, a new study in the AGU journal Geophysical Research Letters argues there needs to be an underground … Continue reading

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THEMIS: South polar ice cap in summer

THEMIS Image of the Day, January 24, 2019. This VIS image of the south polar cap was taken during the middle of southern hemisphere summer. The surface is free of frost and the layering that makes up the cap is … Continue reading

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HiRISE: Impact near the south pole

This image shows a new impact crater that formed between July and September 2018. It’s notable because it occurred in the seasonal southern ice cap, and has apparently punched through it, creating a two-toned blast pattern. The impact hit on … Continue reading

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THEMIS: South polar ice cap layers

THEMIS Image of the Day, January 7, 2019. Today’s VIS image shows a small part of the south polar cap. The layering of the cap is easy to see. The layers record the seasonal deposition of dust and ice over … Continue reading

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