| DOI: | 10.1002/2015GL065314
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| 论文题名: | Mercury's low-degree geoid and topography controlled by insolation-driven elastic deformation |
| 作者: | Tosi N.; Čadek O.; Běhounková M.; Káňová M.; Plesa A.-C.; Grott M.; Breuer D.; Padovan S.; Wieczorek M.A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9590
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| EISSN: | 1944-9321
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| 出版年: | 2015
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| 卷: | 42, 期:18 | | 起始页码: | 7327
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| 结束页码: | 7335
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| 语种: | 英语
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| 英文关键词: | elasticity
; geoid
; mantle convection
; Mercury
; shape
; topography
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| Scopus关键词: | Atmospheric temperature
; Elasticity
; Incident solar radiation
; Joints (anatomy)
; Orbits
; Solar radiation
; Topography
; Tracking (position)
; Density distributions
; geoid
; Longitudinal variations
; Mantle convection
; shape
; Spherical elastic shells
; Spin-orbit resonances
; Thermal perturbations
; Mercury (metal)
; elastic wave
; geochemistry
; geoid
; gravity field
; insolation
; mantle convection
; Mercury (planet)
; perturbation
; spacecraft
; topography
; wavelength
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| 英文摘要: | Mercury experiences an uneven insolation that leads to significant latitudinal and longitudinal variations of its surface temperature. These variations, which are predominantly of spherical harmonic degrees 2 and 4, propagate to depth, imposing a long-wavelength thermal perturbation throughout the mantle. We computed the accompanying density distribution and used it to calculate the mechanical and gravitational response of a spherical elastic shell overlying a quasi-hydrostatic mantle. We then compared the resulting geoid and surface deformation at degrees 2 and 4 with Mercury's geoid and topography derived from the MErcury, Surface, Space ENvironment, GEochemistry, and Ranging spacecraft. More than 95% of the data can be accounted for if the thickness of the elastic lithosphere were between 110 and 180 km when the thermal anomaly was imposed. The obtained elastic thickness implies that Mercury became locked into its present 3:2 spin orbit resonance later than about 1 Gyr after planetary formation. © 2015 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945231589&doi=10.1002%2f2015GL065314&partnerID=40&md5=e629a0d89b68c895bb63ea81b3905540
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9205
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| 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: | Department of Astronomy and Astrophysics, Technische Universität Berlin, Berlin, Germany
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| Recommended Citation: | |
Tosi N.,Čadek O.,Běhounková M.,et al. Mercury's low-degree geoid and topography controlled by insolation-driven elastic deformation[J]. Geophysical Research Letters,2015-01-01,42(18).
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