DOI: 10.1002/2016GL068120
论文题名: Topographic roughness of the northern high latitudes of Mercury from MESSENGER Laser Altimeter data
作者: Fa W. ; Cai Y. ; Xiao Z. ; Tian W.
刊名: Geophysical Research Letters
ISSN: 0094-9111
EISSN: 1944-8842
出版年: 2016
卷: 43, 期: 7 起始页码: 3078
结束页码: 3087
语种: 英语
英文关键词: Hurst exponent
; impact cratering
; median differential slope
; Mercury
; roughness
; volcanism
Scopus关键词: Aneroid altimeters
; Meteorological instruments
; Moon
; Radio altimeters
; Surface roughness
; Tracking (position)
; Differential slope
; Hurst exponents
; Impact cratering
; Laser altimeter datum
; Mercury laser altimeters
; Northern Hemispheres
; Topographic roughness
; Volcanism
; Mercury (metal)
英文摘要: We investigated topographic roughness for the northern hemisphere (>45°N) of Mercury using high-resolution topography data acquired by the Mercury Laser Altimeter (MLA) on board the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft. Our results show that there are distinct differences in the bidirectional slope and root-mean-square (RMS) height among smooth plains (SP), intercrater plains (ICP), and heavily cratered terrain (HCT), and that the ratios of the bidirectional slope and RMS height among the three geologic units are both about 1:2:2.4. Most of Mercury's surface exhibits fractal-like behavior on the basis of the linearity in the deviograms, with median Hurst exponents of 0.66, 0.80, and 0.81 for SP, ICP, and HCT, respectively. The median differential slope map shows that smooth plains are smooth at kilometer scale and become rough at hectometer scale, but they are always rougher than lunar maria at the scales studied. In contrast, intercrater plains and heavily cratered terrain are rough at kilometer scale and smooth at hectometer scale, and they are rougher than lunar highlands at scale <∼2 km but smoother at >∼2 km. We suggest that these scale-dependent roughness characteristics are mainly caused by the difference in density and shape of impact craters between Mercury and the Moon. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981765553&doi=10.1002%2f2016GL068120&partnerID=40&md5=489fd4ca67d1c5f1cabf20b4d66569d1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10074
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Institute of Remote Sensing and Geographical Information System, Peking University, Beijing, China
Recommended Citation:
Fa W.,Cai Y.,Xiao Z.,et al. Topographic roughness of the northern high latitudes of Mercury from MESSENGER Laser Altimeter data[J]. Geophysical Research Letters,2016-01-01,43(7).