DOI: 10.1002/2014GL061195
论文题名: Evidence for lunar true polar wander and a past low-eccentricity, synchronous lunar orbit
作者: Keane J.T. ; Matsuyama I.
刊名: Geophysical Research Letters
ISSN: 0094-9724
EISSN: 1944-9455
出版年: 2014
卷: 41, 期: 19 起始页码: 6610
结束页码: 6619
语种: 英语
英文关键词: GRAIL
; lunar figure
; lunar orbit
; South Pole-Aitken
; true polar wander
Scopus关键词: Geomagnetism
; Orbits
; Poles
; GRAIL
; lunar figure
; Lunar orbit
; South Pole-Aitken
; True Polar Wander
; Moon
; eccentricity
; landform evolution
; lunar cycle
; Moon
; orientation
; rotation
英文摘要: As first noted 200 years ago by Laplace, the Moon's rotational and tidal bulges are significantly larger than expected, given the Moon's present orbital and rotational state. This excess deformation has been ascribed to a fossil figure, frozen in when the Moon was closer to the Earth. However, the observed figure is only consistent with an eccentric and non-synchronous orbit, contrary to our understanding of the Moon's formation and evolution. Here, we show that lunar mascons and impact basins have a significant contribution to the observed lunar figure. Removing their contribution reveals a misaligned fossil figure consistent with an early epoch of true polar wander (driven by the formation of the South Pole-Aitken Basin) and an early low-eccentricity, synchronous lunar orbit. This new self-consistent model solves a long-standing problem in planetary science and will inform future studies of the Moon's dynamical evolution and early dynamo. Key Points Lunar impact basins have a significant contribution to the lunar inertia tensorThe formation of the South Pole-Aitken basin reoriented the Moon ~15°The Moon's lithosphere formed in a smaller, synchronous, low-eccentricity orbit ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911059588&doi=10.1002%2f2014GL061195&partnerID=40&md5=d1e0225dd010161394b29313a04f23f9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6988
Appears in Collections: 气候减缓与适应
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作者单位: Department of Planetary Science, Lunar, and Planetary Laboratory, University of Arizona, Tucson, AZ, United States
Recommended Citation:
Keane J.T.,Matsuyama I.. Evidence for lunar true polar wander and a past low-eccentricity, synchronous lunar orbit[J]. Geophysical Research Letters,2014-01-01,41(19).