globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2211
论文题名:
Strong tidal heating in an ultralow-viscosity zone at the core-mantle boundary of the Moon
作者: Harada Y.; Goossens S.; Matsumoto K.; Yan J.; Ping J.; Noda H.; Haruyama J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:8
起始页码: 569
结束页码: 572
语种: 英语
英文摘要: Tidal heating of a solid planetary body occurs by viscous dissipation, depending on its internal structure and thermal and orbital states. Calculations of the response of the Moon to tidal forces have considered lunar interior structure, but have not reproduced the geodetically observed dependence of dissipation on the lunar tidal period. The attenuation of seismic waves in the deep lunar interior is expected to be consistent with a low-viscosity layer at the core-mantle boundary, which may explain the observed frequency dependence. Here we numerically simulate the viscoelastic tidal response of a Moon that contains a low-viscosity layer at the core-mantle boundary and compare with geodetic observations. In our simulations, a layer with a viscosity of about 2 × 1016 Pa s leads to frequency-dependent tidal dissipation that matches tidal dissipation measurements at both monthly and annual periods. Compared with the lunar asthenosphere, the calculated viscosity is extremely low, and suggests partial melting at the lunar core-mantle boundary. We also find that tidal dissipation is not evenly distributed in the lunar interior, but localized within the low-viscosity layer, which implies that this layer may act as a thermal blanket on the lunar core and influence the Moon's thermal evolution. © 2014 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106568
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Planetary Science Institute, Faculty of Earth Sciences, China University of Geosciences, Wuhan, 388 Lumo Road, Hongshan, Wuhan, Hubei 430074, China; Center for Research and Exploration in Space Science and Technology, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, United States; RISE Project Office, National Astronomical Observatory of Japan, National Institutes of Natural Sciences, 2-12 Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861, Japan; State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Hongshan, Wuhan, Hubei 430079, China; Research Division of Lunar and Deep Space Exploration, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang, Beijing 100012, China; Department of Solar System Sciences, Institute of Space and Aeronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan

Recommended Citation:
Harada Y.,Goossens S.,Matsumoto K.,et al. Strong tidal heating in an ultralow-viscosity zone at the core-mantle boundary of the Moon[J]. Nature Geoscience,2014-01-01,7(8)
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