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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ftunivbern:oai:boris.unibe.ch:46248 2023-08-20T04:07:10+02:00 Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation Pommerol, Antoine Appéré, T. Portyankina, Ganna Aye, Klaus-Michael Thomas, Nicolas Hansen, C.J. 2013-08 application/pdf https://boris.unibe.ch/46248/1/1-s2.0-S0019103512003582-main.pdf https://boris.unibe.ch/46248/ eng eng Elsevier https://boris.unibe.ch/46248/ info:eu-repo/semantics/restrictedAccess Pommerol, Antoine; Appéré, T.; Portyankina, Ganna; Aye, Klaus-Michael; Thomas, Nicolas; Hansen, C.J. (2013). Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation. Icarus, 225(2), pp. 911-922. Elsevier 10.1016/j.icarus.2012.08.039 <http://dx.doi.org/10.1016/j.icarus.2012.08.039> 530 Physics 520 Astronomy 620 Engineering info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2013 ftunivbern https://doi.org/10.1016/j.icarus.2012.08.039 2023-07-31T21:05:08Z 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 BORIS (Bern Open Repository and Information System, University of Bern) Icarus 225 2 911 922 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
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ftunivbern |
language |
English |
topic |
530 Physics 520 Astronomy 620 Engineering |
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530 Physics 520 Astronomy 620 Engineering Pommerol, Antoine Appéré, T. Portyankina, Ganna Aye, Klaus-Michael Thomas, Nicolas Hansen, C.J. Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation |
topic_facet |
530 Physics 520 Astronomy 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 |
Pommerol, Antoine Appéré, T. Portyankina, Ganna Aye, Klaus-Michael Thomas, Nicolas Hansen, C.J. |
author_facet |
Pommerol, Antoine Appéré, T. Portyankina, Ganna Aye, Klaus-Michael Thomas, Nicolas Hansen, C.J. |
author_sort |
Pommerol, Antoine |
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://boris.unibe.ch/46248/1/1-s2.0-S0019103512003582-main.pdf https://boris.unibe.ch/46248/ |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
Pommerol, Antoine; Appéré, T.; Portyankina, Ganna; Aye, Klaus-Michael; Thomas, Nicolas; Hansen, C.J. (2013). Observations of the northern seasonal polar cap on Mars III: CRISM/HiRISE observations of spring sublimation. Icarus, 225(2), pp. 911-922. Elsevier 10.1016/j.icarus.2012.08.039 <http://dx.doi.org/10.1016/j.icarus.2012.08.039> |
op_relation |
https://boris.unibe.ch/46248/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.icarus.2012.08.039 |
container_title |
Icarus |
container_volume |
225 |
container_issue |
2 |
container_start_page |
911 |
op_container_end_page |
922 |
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