Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter
Elevations from the Mars Orbiter Laser Altimeter (MOLA) have been used to construct a precise topographic map of the martian north polar region. The northern ice cap has a maximum elevation of 3 kilometers above its surroundings but lies within a 5-kilometer-deep hemispheric depression that is conti...
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Language: | English |
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American Association for the Advancement of Science (AAAS)
1998
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Online Access: | http://dx.doi.org/10.1126/science.282.5396.2053 https://www.science.org/doi/pdf/10.1126/science.282.5396.2053 |
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craaas:10.1126/science.282.5396.2053 2024-09-15T18:09:47+00:00 Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter Zuber, Maria T. Smith, David E. Solomon, Sean C. Abshire, James B. Afzal, Robert S. Aharonson, Oded Fishbaugh, Kathryn Ford, Peter G. Frey, Herbert V. Garvin, James B. Head, James W. Ivanov, Anton B. Johnson, Catherine L. Muhleman, Duane O. Neumann, Gregory A. Pettengill, Gordon H. Phillips, Roger J. Sun, Xiaoli Zwally, H. Jay Banerdt, W. Bruce Duxbury, Thomas C. 1998 http://dx.doi.org/10.1126/science.282.5396.2053 https://www.science.org/doi/pdf/10.1126/science.282.5396.2053 en eng American Association for the Advancement of Science (AAAS) Science volume 282, issue 5396, page 2053-2060 ISSN 0036-8075 1095-9203 journal-article 1998 craaas https://doi.org/10.1126/science.282.5396.2053 2024-09-05T04:01:26Z Elevations from the Mars Orbiter Laser Altimeter (MOLA) have been used to construct a precise topographic map of the martian north polar region. The northern ice cap has a maximum elevation of 3 kilometers above its surroundings but lies within a 5-kilometer-deep hemispheric depression that is contiguous with the area into which most outflow channels emptied. Polar cap topography displays evidence of modification by ablation, flow, and wind and is consistent with a primarily H 2 O composition. Correlation of topography with images suggests that the cap was more spatially extensive in the past. The cap volume of 1.2 × 10 6 to 1.7 × 10 6 cubic kilometers is about half that of the Greenland ice cap. Clouds observed over the polar cap are likely composed of CO 2 that condensed out of the atmosphere during northern hemisphere winter. Many clouds exhibit dynamical structure likely caused by the interaction of propagating wave fronts with surface topography. Article in Journal/Newspaper Greenland Ice cap AAAS Resource Center (American Association for the Advancement of Science) Science 282 5396 2053 2060 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
Elevations from the Mars Orbiter Laser Altimeter (MOLA) have been used to construct a precise topographic map of the martian north polar region. The northern ice cap has a maximum elevation of 3 kilometers above its surroundings but lies within a 5-kilometer-deep hemispheric depression that is contiguous with the area into which most outflow channels emptied. Polar cap topography displays evidence of modification by ablation, flow, and wind and is consistent with a primarily H 2 O composition. Correlation of topography with images suggests that the cap was more spatially extensive in the past. The cap volume of 1.2 × 10 6 to 1.7 × 10 6 cubic kilometers is about half that of the Greenland ice cap. Clouds observed over the polar cap are likely composed of CO 2 that condensed out of the atmosphere during northern hemisphere winter. Many clouds exhibit dynamical structure likely caused by the interaction of propagating wave fronts with surface topography. |
format |
Article in Journal/Newspaper |
author |
Zuber, Maria T. Smith, David E. Solomon, Sean C. Abshire, James B. Afzal, Robert S. Aharonson, Oded Fishbaugh, Kathryn Ford, Peter G. Frey, Herbert V. Garvin, James B. Head, James W. Ivanov, Anton B. Johnson, Catherine L. Muhleman, Duane O. Neumann, Gregory A. Pettengill, Gordon H. Phillips, Roger J. Sun, Xiaoli Zwally, H. Jay Banerdt, W. Bruce Duxbury, Thomas C. |
spellingShingle |
Zuber, Maria T. Smith, David E. Solomon, Sean C. Abshire, James B. Afzal, Robert S. Aharonson, Oded Fishbaugh, Kathryn Ford, Peter G. Frey, Herbert V. Garvin, James B. Head, James W. Ivanov, Anton B. Johnson, Catherine L. Muhleman, Duane O. Neumann, Gregory A. Pettengill, Gordon H. Phillips, Roger J. Sun, Xiaoli Zwally, H. Jay Banerdt, W. Bruce Duxbury, Thomas C. Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter |
author_facet |
Zuber, Maria T. Smith, David E. Solomon, Sean C. Abshire, James B. Afzal, Robert S. Aharonson, Oded Fishbaugh, Kathryn Ford, Peter G. Frey, Herbert V. Garvin, James B. Head, James W. Ivanov, Anton B. Johnson, Catherine L. Muhleman, Duane O. Neumann, Gregory A. Pettengill, Gordon H. Phillips, Roger J. Sun, Xiaoli Zwally, H. Jay Banerdt, W. Bruce Duxbury, Thomas C. |
author_sort |
Zuber, Maria T. |
title |
Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter |
title_short |
Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter |
title_full |
Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter |
title_fullStr |
Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter |
title_full_unstemmed |
Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter |
title_sort |
observations of the north polar region of mars from the mars orbiter laser altimeter |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1998 |
url |
http://dx.doi.org/10.1126/science.282.5396.2053 https://www.science.org/doi/pdf/10.1126/science.282.5396.2053 |
genre |
Greenland Ice cap |
genre_facet |
Greenland Ice cap |
op_source |
Science volume 282, issue 5396, page 2053-2060 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.282.5396.2053 |
container_title |
Science |
container_volume |
282 |
container_issue |
5396 |
container_start_page |
2053 |
op_container_end_page |
2060 |
_version_ |
1810447369398910976 |