Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation
We analyze a series of targeted CRISM and HiRISE observations of seven regions of interest at high latitudes in the Northern polar regions of Mars. These data allow us to investigate the temporal evolution of the composition of the seasonal ice cap during spring, with a special emphasis on peculiar...
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ftdatacite:10.7892/boris.46248 2023-05-15T16:38:18+02:00 Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation Hansen, C.J. Appéré, T. Thomas, Nicolas Aye, Klaus-Michael Portyankina, Ganna Pommerol, Antoine 2013 application/pdf https://dx.doi.org/10.7892/boris.46248 http://boris.unibe.ch/46248/ en eng Elsevier info:eu-repo/semantics/restrictedAccess 520 Astronomy 530 Physics 620 Engineering CreativeWork article 2013 ftdatacite https://doi.org/10.7892/boris.46248 2021-11-05T12:55:41Z We analyze a series of targeted CRISM and HiRISE observations of seven regions of interest at high latitudes in the Northern polar regions of Mars. These data allow us to investigate the temporal evolution of the composition of the seasonal ice cap during spring, with a special emphasis on peculiar phenomena occurring in the dune fields and in the vicinity of the scarps of the North Polar Layered Deposits (NPLDs). The strength of the spectral signature of CO2 ice continuously decreases during spring whereas the one of H2O ice first shows a strong increase until Ls = 50°. This evolution is consistent with a scenario previously established from analysis of OMEGA data, in which a thin layer of pure H2O ice progressively develops at the surface of the volatile layer. During early spring (Ls < 10°), widespread jet activity is observed by HiRISE while strong spectral signatures of CO2 ice are detected by CRISM. Later, around Ls = 20-40°, activity concentrates at the dune fields where CRISM also detects a spectral enrichment in CO2 ice, consistent with "Kieffer's model" (Kieffer, H.H. [2007]. J. Geophys. Res. 112, E08005. doi:10.1029/2006JE002816) for jet activity. Effects of wind are prominent across the dune fields and seem to strongly influence the sublimation of the volatile layer. Strong winds blowing down the scarps could also be responsible for the significant spatial and temporal variability of the surface ice composition observed close to the NPLD. Article in Journal/Newspaper Ice cap DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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English |
topic |
520 Astronomy 530 Physics 620 Engineering |
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520 Astronomy 530 Physics 620 Engineering Hansen, C.J. Appéré, T. Thomas, Nicolas Aye, Klaus-Michael Portyankina, Ganna Pommerol, Antoine Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation |
topic_facet |
520 Astronomy 530 Physics 620 Engineering |
description |
We analyze a series of targeted CRISM and HiRISE observations of seven regions of interest at high latitudes in the Northern polar regions of Mars. These data allow us to investigate the temporal evolution of the composition of the seasonal ice cap during spring, with a special emphasis on peculiar phenomena occurring in the dune fields and in the vicinity of the scarps of the North Polar Layered Deposits (NPLDs). The strength of the spectral signature of CO2 ice continuously decreases during spring whereas the one of H2O ice first shows a strong increase until Ls = 50°. This evolution is consistent with a scenario previously established from analysis of OMEGA data, in which a thin layer of pure H2O ice progressively develops at the surface of the volatile layer. During early spring (Ls < 10°), widespread jet activity is observed by HiRISE while strong spectral signatures of CO2 ice are detected by CRISM. Later, around Ls = 20-40°, activity concentrates at the dune fields where CRISM also detects a spectral enrichment in CO2 ice, consistent with "Kieffer's model" (Kieffer, H.H. [2007]. J. Geophys. Res. 112, E08005. doi:10.1029/2006JE002816) for jet activity. Effects of wind are prominent across the dune fields and seem to strongly influence the sublimation of the volatile layer. Strong winds blowing down the scarps could also be responsible for the significant spatial and temporal variability of the surface ice composition observed close to the NPLD. |
format |
Article in Journal/Newspaper |
author |
Hansen, C.J. Appéré, T. Thomas, Nicolas Aye, Klaus-Michael Portyankina, Ganna Pommerol, Antoine |
author_facet |
Hansen, C.J. Appéré, T. Thomas, Nicolas Aye, Klaus-Michael Portyankina, Ganna Pommerol, Antoine |
author_sort |
Hansen, C.J. |
title |
Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation |
title_short |
Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation |
title_full |
Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation |
title_fullStr |
Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation |
title_full_unstemmed |
Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation |
title_sort |
observations of the northern seasonal polar cap on mars iii: crism/hirise observations of spring sublimation |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://dx.doi.org/10.7892/boris.46248 http://boris.unibe.ch/46248/ |
genre |
Ice cap |
genre_facet |
Ice cap |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.7892/boris.46248 |
_version_ |
1766028586082369536 |