Analyzing Surface Ruggedness Inside and Outside of Ice Stability Zones at the Lunar Poles
Open Access
- 1 October 2021
- journal article
- research article
- Published by American Astronomical Society in The Planetary Science Journal
- Vol. 2 (5), 213
- https://doi.org/10.3847/psj/ac24ff
Abstract
We measured surface ruggedness within 12 polar craters on the Moon, six at each pole, using a variation of the Vector Ruggedness Measure (VRM*). We compare VRM* values derived within ice stability zones, where maximum surface temperatures are <= 112 K, to VRM* values from warmer surfaces where ice is not stable. Ruggedness values inside and outside of ice stability zones are statistically not from the same continuous distribution (alpha = 0.05). In nine of the 12 investigated craters, surfaces where ice is stable are smoother than neighboring warmer surfaces. These comparatively smooth surfaces are observed in both craters that host surface water-ice exposures and those that do not, suggesting that the presence of subsurface ice, rather than surface ice, may be responsible for the reduced surface ruggedness derived from a moving window of 3 x 3 cells applied to 120 m elevation models. Reduced ruggedness of ice stability zones is slightly greater in south polar craters and tends to correlate with enhanced hydrogen content as modeled from Lunar Prospector data. While ice stability zones may have a control on the distribution of softened topography at the lunar poles, the magnitude of this softening is small at the investigated baselines.Funding Information
- NASA (NPP)
This publication has 80 references indexed in Scilit:
- Two‐dimensional distribution of volatiles in the lunar regolith from space weathering simulationsGeophysical Research Letters, 2012
- Spatial distribution of lunar polar hydrogen deposits after KAGUYA (SELENE)Geophysical Research Letters, 2010
- Initial results for the north pole of the Moon from Mini‐SAR, Chandrayaan‐1 missionGeophysical Research Letters, 2010
- Models of the distribution and abundance of hydrogen at the lunar south poleGeophysical Research Letters, 2007
- Space weathering effects on lunar cold trap depositsJournal of Geophysical Research, 2003
- Mars: Nature and evolution of young latitude‐dependent water‐ice‐rich mantleGeophysical Research Letters, 2002
- Evidence for water ice near the lunar polesJournal of Geophysical Research, 2001
- Kilometer‐scale roughness of Mars: Results from MOLA data analysisJournal of Geophysical Research, 2000
- Polar hydrogen deposits on the MoonJournal of Geophysical Research, 2000
- Lunar neutron leakage fluxes as a function of composition and hydrogen contentGeophysical Research Letters, 1991