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Kilometer-Scale Topographic Roughness of Mercury: Correlation with Geologic Features and UnitsWe present maps of the topographic roughness of the northern circumpolar area of Mercury at kilometer scales. The maps are derived from range profiles obtained by the Mercury Laser Altimeter (MLA) instrument onboard the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission. As measures of roughness, we used the interquartile range of profile curvature at three baselines: 0.7 kilometers, 2.8 kilometers, and 11 kilometers. The maps provide a synoptic overview of variations of typical topographic textures. They show a dichotomy between the smooth northern plains and rougher, more heavily cratered terrains. Analysis of the scale dependence of roughness indicates that the regolith on Mercury is thicker than on the Moon by approximately a factor of three. Roughness contrasts within northern volcanic plains of Mercury indicate a younger unit inside Goethe basin and inside another unnamed stealth basin. These new data permit interplanetary comparisons of topographic roughness.
Document ID
20160008403
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kreslavsky, Mikhail A. (California Univ. Santa Cruz, CA, United States)
Head, James W. (Brown Univ. Providence, RI, United States)
Neumann, Gregory A. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Zuber, Maria T. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Smith, David E. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Date Acquired
July 1, 2016
Publication Date
December 8, 2014
Publication Information
Publication: Geophysical Research Letters
Volume: 41
Issue: 23
Subject Category
Lunar and Planetary Science and Exploration
Report/Patent Number
GSFC-E-DAA-TN20443
Funding Number(s)
CONTRACT_GRANT: NNX13AJ86G
CONTRACT_GRANT: NNX13AO77G
CONTRACT_GRANT: NNX11AK29G
Distribution Limits
Public
Copyright
Other
Keywords
Kilometer-Scale
Mercury
Topographic