| DOI: | 10.1038/s41561-020-00682-0
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| 论文题名: | Implantation of Martian atmospheric ions within the regolith of Phobos |
| 作者: | Nénon Q.; Poppe A.R.; Rahmati A.; McFadden J.P.
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| 刊名: | Nature Geoscience
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| ISSN: | 17520894
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| 出版年: | 2021
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| 卷: | 14, 期:2 | | 起始页码: | 61
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| 结束页码: | 66
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| 语种: | 英语
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| 英文关键词: | anisotropy
; ion exchange
; Martian atmosphere
; planetary atmosphere
; regolith
; spacecraft
; weathering
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| 英文摘要: | When a planet has an orbiting moon, atoms and molecules that escape the planetary atmosphere as ions and are accelerated into space may be implanted and preserved inside the moon’s surface. Here, we determine the long-term averaged anisotropy of ions escaping the atmosphere of Mars and impacting its moon Phobos from more than four years of in situ ion observations. These measurements are used to quantify an estimate of the average flux of ions that has been impacting each location on Phobos over geologic timescales. We find that the flux of bombarding Martian ions is highly asymmetric on the moon’s surface, as the nearside of Phobos sees a flux higher by a factor of 15 to 100 than its farside. We show that a first consequence of this is that Martian atmospheric oxygen, carbon, nitrogen and argon atoms are implanted and may be preserved inside the uppermost hundreds of nanometres of Phobos’s nearside regolith grains, which may be brought back to Earth by future sample return missions. The second effect is that alteration of the regolith properties is asymmetric on Phobos’s surface, as Martian ions accelerate weathering of the nearside by a factor of ~2. © 2021, The Author(s), under exclusive licence to Springer Nature Limited. |
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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/169797
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| Appears in Collections: | 气候变化与战略
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作者单位: | Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA, United States
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| Recommended Citation: | |
Nénon Q.,Poppe A.R.,Rahmati A.,et al. Implantation of Martian atmospheric ions within the regolith of Phobos[J]. Nature Geoscience,2021-01-01,14(2)
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