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DOI | 10.1002/2017GL072635 |
Unique, non-Earthlike, meteoritic ion behavior in upper atmosphere of Mars | |
Grebowsky, J. M.1; Benna, M.1,2; Plane, J. M. C.3; Collinson, G. A.1,4; Mahaffy, P. R.1; Jakosky, B. M.5 | |
2017-04-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | Interplanetary dust particles have long been expected to produce permanent ionospheric metal ion layers at Mars, as on Earth, but the two environments are so different that uncertainty existed as to whether terrestrial-established understanding would apply to Mars. The Mars Atmosphere and Volatile EvolutioN (MAVEN) mission made the first in situ detection of the continuous presence of Na+, Mg+, and Fe+ at Mars and indeed revealed non-Earthlike features/processes. There is no separation of the light Mg+ and the heavy Fe+ with increasing altitude as expected for gravity control. The metal ions are well-mixed with the neutral atmosphere at altitudes where no mixing process is expected. Isolated metal ion layers mimicking Earth's sporadic E layers occur despite the lack of a strong magnetic field as required at Earth. Further, the metal ion distributions are coherent enough to always show atmospheric gravity wave signatures. All features and processes are unique to Mars. Plain Language Summary We have extensive knowledge of metal ion layers in the Earth's ionosphere resulting from the atmospheric ablation of interplanetary dust particles. Understanding of potential ionospheric metals in other planetary atmospheres has been based primarily on our terrestrial understanding and the inference of their presence on other planets from radio occultation measurements of low-altitude electron density layers. The ion measurements from the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft, now orbiting Mars, have now corroborated the continual presence of metal ion species in the Mars ionosphere. Further, these metal ion distributions are drastically different from those at Earth because the terrestrial ions are strongly affected by the Earth's intrinsic magnetic field, whereas Mars has no such field. Unique Mars metal ion structures have been encountered that have no counterpart in the Earth's ionosphere. |
英文关键词 | interplanetary dust Mars ionosphere metal ions ion transport gravity waves |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400186500012 |
WOS关键词 | PLANETARY-ATMOSPHERES ; CHARGE-TRANSFER ; MAGNESIUM-IONS ; LAYERS ; O-2 ; IONOSPHERE ; CHEMISTRY ; MODEL ; FE+ ; N-2 |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28091 |
专题 | 气候变化 |
作者单位 | 1.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 2.Univ Maryland, CSST, Baltimore, MD 21201 USA; 3.Univ Leeds, Sch Chem, Leeds, W Yorkshire, England; 4.Catholic Univ Amer, Inst Astrophys & Computat Sci, Washington, DC 20064 USA; 5.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Grebowsky, J. M.,Benna, M.,Plane, J. M. C.,et al. Unique, non-Earthlike, meteoritic ion behavior in upper atmosphere of Mars[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(7). |
APA | Grebowsky, J. M.,Benna, M.,Plane, J. M. C.,Collinson, G. A.,Mahaffy, P. R.,&Jakosky, B. M..(2017).Unique, non-Earthlike, meteoritic ion behavior in upper atmosphere of Mars.GEOPHYSICAL RESEARCH LETTERS,44(7). |
MLA | Grebowsky, J. M.,et al."Unique, non-Earthlike, meteoritic ion behavior in upper atmosphere of Mars".GEOPHYSICAL RESEARCH LETTERS 44.7(2017). |
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