Carbon Dioxide Ice Glaciers at the South Pole of Mars
Massive, kilometer thick deposits of carbon dioxide (CO2) ice have been detected at the south polar cap of Mars by radar investigations. These deposits are divided into several units that are separated by thin water ice bounding layers. Recent studies investigated the accumulation history of CO2 ice...
Published in: | Journal of Geophysical Research: Planets |
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Online Access: | http://hdl.handle.net/2115/87034 https://doi.org/10.1029/2022JE007193 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/87034 2023-05-15T18:22:29+02:00 Carbon Dioxide Ice Glaciers at the South Pole of Mars Smith, I. B. Schlegel, N. -j. Larour, E. Isola, I. Buhler, P. B. Putzig, N. E. Greve, R. http://hdl.handle.net/2115/87034 https://doi.org/10.1029/2022JE007193 eng eng American Geophysical Union http://hdl.handle.net/2115/87034 Journal of Geophysical Research Planets, 127(4): e2022JE007193 http://dx.doi.org/10.1029/2022JE007193 Copyright 2022 American Geophysical Union. 452 article (author version) fthokunivhus https://doi.org/10.1029/2022JE007193 2022-11-18T01:07:01Z Massive, kilometer thick deposits of carbon dioxide (CO2) ice have been detected at the south polar cap of Mars by radar investigations. These deposits are divided into several units that are separated by thin water ice bounding layers. Recent studies investigated the accumulation history of CO2 ice and found that the deposits most likely formed during several episodes in the past, when Martian obliquity was much lower than now. Those studies, while able to predict total volumes of CO2 ice consistent with those observed, did not attempt to explain the anomalous three-dimensional distribution (thickness or extent) of CO2 ice or the ice's offset from the topographic high of the polar cap. In this paper we use a combination of feature analysis and numerical modeling to demonstrate that the CO2 deposits flow as glaciers and that glacial flow distributes the ice into its current position. Further, this distribution allows the ice to survive during high obliquity excursions. Article in Journal/Newspaper South pole Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) South Pole Journal of Geophysical Research: Planets 127 4 |
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Open Polar |
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Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
language |
English |
topic |
452 |
spellingShingle |
452 Smith, I. B. Schlegel, N. -j. Larour, E. Isola, I. Buhler, P. B. Putzig, N. E. Greve, R. Carbon Dioxide Ice Glaciers at the South Pole of Mars |
topic_facet |
452 |
description |
Massive, kilometer thick deposits of carbon dioxide (CO2) ice have been detected at the south polar cap of Mars by radar investigations. These deposits are divided into several units that are separated by thin water ice bounding layers. Recent studies investigated the accumulation history of CO2 ice and found that the deposits most likely formed during several episodes in the past, when Martian obliquity was much lower than now. Those studies, while able to predict total volumes of CO2 ice consistent with those observed, did not attempt to explain the anomalous three-dimensional distribution (thickness or extent) of CO2 ice or the ice's offset from the topographic high of the polar cap. In this paper we use a combination of feature analysis and numerical modeling to demonstrate that the CO2 deposits flow as glaciers and that glacial flow distributes the ice into its current position. Further, this distribution allows the ice to survive during high obliquity excursions. |
format |
Article in Journal/Newspaper |
author |
Smith, I. B. Schlegel, N. -j. Larour, E. Isola, I. Buhler, P. B. Putzig, N. E. Greve, R. |
author_facet |
Smith, I. B. Schlegel, N. -j. Larour, E. Isola, I. Buhler, P. B. Putzig, N. E. Greve, R. |
author_sort |
Smith, I. B. |
title |
Carbon Dioxide Ice Glaciers at the South Pole of Mars |
title_short |
Carbon Dioxide Ice Glaciers at the South Pole of Mars |
title_full |
Carbon Dioxide Ice Glaciers at the South Pole of Mars |
title_fullStr |
Carbon Dioxide Ice Glaciers at the South Pole of Mars |
title_full_unstemmed |
Carbon Dioxide Ice Glaciers at the South Pole of Mars |
title_sort |
carbon dioxide ice glaciers at the south pole of mars |
publisher |
American Geophysical Union |
url |
http://hdl.handle.net/2115/87034 https://doi.org/10.1029/2022JE007193 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://hdl.handle.net/2115/87034 Journal of Geophysical Research Planets, 127(4): e2022JE007193 http://dx.doi.org/10.1029/2022JE007193 |
op_rights |
Copyright 2022 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2022JE007193 |
container_title |
Journal of Geophysical Research: Planets |
container_volume |
127 |
container_issue |
4 |
_version_ |
1766201899476844544 |