Subsurface Radar Sounding of the South Polar Layered Deposits of Mars
- 6 April 2007
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 316 (5821), 92-95
- https://doi.org/10.1126/science.1139672
Abstract
The ice-rich south polar layered deposits of Mars were probed with the Mars Advanced Radar for Subsurface and Ionospheric Sounding on the Mars Express orbiter. The radar signals penetrate deep into the deposits (more than 3.7 kilometers). For most of the area, a reflection is detected at a time delay that is consistent with an interface between the deposits and the substrate. The reflected power from this interface indicates minimal attenuation of the signal, suggesting a composition of nearly pure water ice. Maps were generated of the topography of the basal interface and the thickness of the layered deposits. A set of buried depressions is seen within 300 kilometers of the pole. The thickness map shows an asymmetric distribution of the deposits and regions of anomalous thickness. The total volume is estimated to be 1.6 × 106 cubic kilometers, which is equivalent to a global water layer approximately 11 meters thick.This publication has 13 references indexed in Scilit:
- Perennial water ice identified in the south polar cap of MarsNature, 2004
- A Sublimation Model for Martian South Polar Ice FeaturesScience, 2003
- Mars Global Surveyor Mars Orbiter Camera: Interplanetary cruise through primary missionJournal of Geophysical Research, 2001
- Mars Orbiter Laser Altimeter: Experiment summary after the first year of global mapping of MarsJournal of Geophysical Research, 2001
- Stereo topography of the south polar region of Mars: Volatile inventory and Mars Polar Lander landing siteJournal of Geophysical Research, 2000
- H2O grain size and the amount of dust in Mars' Residual north polar capJournal of Geophysical Research, 1990
- Stratigraphic relationships within Martian polar cap depositsIcarus, 1982
- Topography and stratigraphy of Martian polar layered depositsIcarus, 1982
- The astronomical theory of climatic change on MarsIcarus, 1980
- Geological framework of the south polar region of MarsIcarus, 1972