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| Titel |
Spatial distribution and characteristics of rampart craters on Mars using multi-spacecraft observational data |
| VerfasserIn |
H. J. Hsu, W. H. Ip, J. J. Jian |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250029244
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| Zusammenfassung |
| Some Martian craters filled with water ice and CO2 ice on their bottom at northern polar
region (upper than 65Ë N). Areas of ice filled regions of craters change during seasons. One
of the special types of impact craters are rampart craters which only exist on Mars. It is
considered to indicate ice or liquid water buried beneath the surface of Mars at the time of
impact. We use four instruments - HRSC (High Resolution Stereo Camera, Mars Express),
MOC (Mars Orbiter Camera, Mars Global Surveyor), THEMIS (Thermal, Emission Imaging
System, Mars Odyssey) and HiRISE (High Resolution Imaging Science Experiment,
Mars Reconnaissance Orbiter) – in order to characterize the physical properties of
ice-bottomed craters. We systematically investigate the relationships between morphology,
crater diameter vs. ice cap diameter and depth of craters. These results show that
craters which have ice caps inside the cavity happened at higher latitude and the
depth of the ice-rich layer may be very shallow. The presence of ice shows that
there is much water-ice on and beneath the surface of the Martian polar region. |
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