Sublimation of the Martian CO2 Seasonal South Polar Cap
The polar condensation/sublimation of CO2, that involve about one fourth of the atmosphere mass, is the major Martian climatic cycle. Early observations in visible and thermal infrared have shown that the sublimation of the Seasonal South Polar Cap (SSPC) is not symmetric around the geographic South...
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ftdatacite:10.48550/arxiv.1003.4453 2023-05-15T18:22:34+02:00 Sublimation of the Martian CO2 Seasonal South Polar Cap Schmidt, Frederic Schmitt, Bernard Doute, Sylvain Forget, Francois Jian, Jeng-Jong Martin, Patrick Langevin, Yves Bibring, Jean-Pierre Team, the OMEGA 2010 https://dx.doi.org/10.48550/arxiv.1003.4453 https://arxiv.org/abs/1003.4453 unknown arXiv https://dx.doi.org/10.1016/j.pss.2010.03.018 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences article-journal Article ScholarlyArticle Text 2010 ftdatacite https://doi.org/10.48550/arxiv.1003.4453 https://doi.org/10.1016/j.pss.2010.03.018 2022-04-01T14:57:50Z The polar condensation/sublimation of CO2, that involve about one fourth of the atmosphere mass, is the major Martian climatic cycle. Early observations in visible and thermal infrared have shown that the sublimation of the Seasonal South Polar Cap (SSPC) is not symmetric around the geographic South Pole. Here we use observations by OMEGA/Mars Express in the near-infrared to detect unambiguously the presence of CO2 at the surface, and to estimate albedo. Second, we estimate the sublimation of CO2 released in the atmosphere and show that there is a two-step process. From Ls=180° to 220°, the sublimation is nearly symmetric with a slight advantage for the cryptic region. After Ls=220° the anti-cryptic region sublimation is stronger. Those two phases are not balanced such that there is 22% +/- 9 more mass the anti-cryptic region, arguing for more snow precipitation. We compare those results with the MOLA height measurements. Finally we discuss implications for the Martian atmosphere about general circulation and gas tracers, e.g. Ar. : 11 pages, 8 figures Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
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Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences Schmidt, Frederic Schmitt, Bernard Doute, Sylvain Forget, Francois Jian, Jeng-Jong Martin, Patrick Langevin, Yves Bibring, Jean-Pierre Team, the OMEGA Sublimation of the Martian CO2 Seasonal South Polar Cap |
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Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
description |
The polar condensation/sublimation of CO2, that involve about one fourth of the atmosphere mass, is the major Martian climatic cycle. Early observations in visible and thermal infrared have shown that the sublimation of the Seasonal South Polar Cap (SSPC) is not symmetric around the geographic South Pole. Here we use observations by OMEGA/Mars Express in the near-infrared to detect unambiguously the presence of CO2 at the surface, and to estimate albedo. Second, we estimate the sublimation of CO2 released in the atmosphere and show that there is a two-step process. From Ls=180° to 220°, the sublimation is nearly symmetric with a slight advantage for the cryptic region. After Ls=220° the anti-cryptic region sublimation is stronger. Those two phases are not balanced such that there is 22% +/- 9 more mass the anti-cryptic region, arguing for more snow precipitation. We compare those results with the MOLA height measurements. Finally we discuss implications for the Martian atmosphere about general circulation and gas tracers, e.g. Ar. : 11 pages, 8 figures |
format |
Text |
author |
Schmidt, Frederic Schmitt, Bernard Doute, Sylvain Forget, Francois Jian, Jeng-Jong Martin, Patrick Langevin, Yves Bibring, Jean-Pierre Team, the OMEGA |
author_facet |
Schmidt, Frederic Schmitt, Bernard Doute, Sylvain Forget, Francois Jian, Jeng-Jong Martin, Patrick Langevin, Yves Bibring, Jean-Pierre Team, the OMEGA |
author_sort |
Schmidt, Frederic |
title |
Sublimation of the Martian CO2 Seasonal South Polar Cap |
title_short |
Sublimation of the Martian CO2 Seasonal South Polar Cap |
title_full |
Sublimation of the Martian CO2 Seasonal South Polar Cap |
title_fullStr |
Sublimation of the Martian CO2 Seasonal South Polar Cap |
title_full_unstemmed |
Sublimation of the Martian CO2 Seasonal South Polar Cap |
title_sort |
sublimation of the martian co2 seasonal south polar cap |
publisher |
arXiv |
publishDate |
2010 |
url |
https://dx.doi.org/10.48550/arxiv.1003.4453 https://arxiv.org/abs/1003.4453 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1016/j.pss.2010.03.018 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1003.4453 https://doi.org/10.1016/j.pss.2010.03.018 |
_version_ |
1766201976243093504 |