Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap
The spectral signature of water ice was observed on Martian south polar cap in 2004 by the Observatoire pour l'Mineralogie, l'Eau les Glaces et l'Activite (OMEGA) (Bibring et al., 2004). Three years later, the OMEGA instrument was used to discover water ice deposited during southern s...
Main Authors: | , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
arXiv
2014
|
Subjects: | |
Online Access: | https://dx.doi.org/10.48550/arxiv.1407.0111 https://arxiv.org/abs/1407.0111 |
id |
ftdatacite:10.48550/arxiv.1407.0111 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.48550/arxiv.1407.0111 2023-05-15T16:38:21+02:00 Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap Brown, Adrian J. Piqueux, Sylvain Titus, Timothy N. 2014 https://dx.doi.org/10.48550/arxiv.1407.0111 https://arxiv.org/abs/1407.0111 unknown arXiv https://dx.doi.org/10.1016/j.epsl.2014.08.039 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 2014 ftdatacite https://doi.org/10.48550/arxiv.1407.0111 https://doi.org/10.1016/j.epsl.2014.08.039 2022-04-01T12:43:54Z The spectral signature of water ice was observed on Martian south polar cap in 2004 by the Observatoire pour l'Mineralogie, l'Eau les Glaces et l'Activite (OMEGA) (Bibring et al., 2004). Three years later, the OMEGA instrument was used to discover water ice deposited during southern summer on the polar cap (Langevin et al., 2007). However, temporal and spatial variations of these water ice signatures have remained unexplored, and the origins of these water deposits remains an important scientific question. To investigate this question, we have used observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument on the Mars Reconnaissance Orbiter (MRO) spacecraft of the southern cap during austral summer over four Martian years to search for variations in the amount of water ice. We report below that for each year we have observed the cap, the magnitude of the H2O ice signature on the southern cap has risen steadily throughout summer, particularly on the west end of the cap. The spatial extent of deposition is in disagreement with the current best simulations of deposition of water ice on the south polar cap (Montmessin et al., 2007). This increase in water ice signatures is most likely caused by deposition of atmospheric H2O ice and a set of unusual conditions makes the quantification of this transport flux using CRISM close to ideal. We calculate a 'minimum apparent' amount of deposition corresponding to a thin H2O ice layer of 0.2mm (with 70 percent porosity). This amount of H2O ice deposition is 0.6-6 percent of the total Martian atmospheric water budget. We compare our 'minimal apparent' quantification with previous estimates. This deposition process may also have implications for the formation and stability of the southern CO2 ice cap, and therefore play a significant role in the climate budget of modern day Mars. : 35 pages, 5 figures, 2 tables and supplementary information of 2 tables Text Ice cap DataCite Metadata Store (German National Library of Science and Technology) Austral |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
spellingShingle |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences Brown, Adrian J. Piqueux, Sylvain Titus, Timothy N. Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap |
topic_facet |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
description |
The spectral signature of water ice was observed on Martian south polar cap in 2004 by the Observatoire pour l'Mineralogie, l'Eau les Glaces et l'Activite (OMEGA) (Bibring et al., 2004). Three years later, the OMEGA instrument was used to discover water ice deposited during southern summer on the polar cap (Langevin et al., 2007). However, temporal and spatial variations of these water ice signatures have remained unexplored, and the origins of these water deposits remains an important scientific question. To investigate this question, we have used observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument on the Mars Reconnaissance Orbiter (MRO) spacecraft of the southern cap during austral summer over four Martian years to search for variations in the amount of water ice. We report below that for each year we have observed the cap, the magnitude of the H2O ice signature on the southern cap has risen steadily throughout summer, particularly on the west end of the cap. The spatial extent of deposition is in disagreement with the current best simulations of deposition of water ice on the south polar cap (Montmessin et al., 2007). This increase in water ice signatures is most likely caused by deposition of atmospheric H2O ice and a set of unusual conditions makes the quantification of this transport flux using CRISM close to ideal. We calculate a 'minimum apparent' amount of deposition corresponding to a thin H2O ice layer of 0.2mm (with 70 percent porosity). This amount of H2O ice deposition is 0.6-6 percent of the total Martian atmospheric water budget. We compare our 'minimal apparent' quantification with previous estimates. This deposition process may also have implications for the formation and stability of the southern CO2 ice cap, and therefore play a significant role in the climate budget of modern day Mars. : 35 pages, 5 figures, 2 tables and supplementary information of 2 tables |
format |
Text |
author |
Brown, Adrian J. Piqueux, Sylvain Titus, Timothy N. |
author_facet |
Brown, Adrian J. Piqueux, Sylvain Titus, Timothy N. |
author_sort |
Brown, Adrian J. |
title |
Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap |
title_short |
Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap |
title_full |
Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap |
title_fullStr |
Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap |
title_full_unstemmed |
Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap |
title_sort |
interannual observations and quantification of summertime h2o ice deposition on the martian co2 ice south polar cap |
publisher |
arXiv |
publishDate |
2014 |
url |
https://dx.doi.org/10.48550/arxiv.1407.0111 https://arxiv.org/abs/1407.0111 |
geographic |
Austral |
geographic_facet |
Austral |
genre |
Ice cap |
genre_facet |
Ice cap |
op_relation |
https://dx.doi.org/10.1016/j.epsl.2014.08.039 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1407.0111 https://doi.org/10.1016/j.epsl.2014.08.039 |
_version_ |
1766028623470395392 |