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DOI | 10.1029/2018GL080597 |
Ionospheric Ambipolar Electric Fields of Mars and Venus: Comparisons Between Theoretical Predictions and Direct Observations of the Electric Potential Drop | |
Collinson, Glyn1,2,3; Glocer, Alex1; Xu, Shaosui3; Mitchell, David3; Frahm, Rudy A.4; Grebowsky, Joseph1; Andersson, Laila5; Jakosky, Bruce5 | |
2019-02-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:3页码:1168-1176 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We test the hypothesis that their dominant driver of a planetary ambipolar electric field is the ionospheric electron pressure gradient (del P-e). The ionospheres of Venus and Mars are mapped using Langmuir probe measurements from NASA's Pioneer Venus Orbiter (PVO) and Mars Atmosphere and Volatile EvolutioN (MAVEN) missions. We then determine the component of the ionospheric potential drop that can be explained by the electron pressure gradient drop along a simple draped field line. At Mars, this calculation is consistent with the mean potential drops measured statistically by MAVEN. However, at Venus, contrary to our current understanding, the thermal electron pressure gradient alone cannot explain Venus' strong ambipolar field. These results strongly motivate a return to Venus with a comprehensive plasmas and fields package, similar to that on MAVEN, to investigate the physics of atmospheric escape at Earth's closest analog. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462072800006 |
WOS关键词 | POLAR ; TEMPERATURE ; WIND |
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/181332 |
专题 | 气候变化 |
作者单位 | 1.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 2.Catholic Univ Amer, Inst Astrophys & Computat Sci, Washington, DC 20064 USA; 3.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 4.Southwest Res Inst, San Antonio, TX USA; 5.Lab Atmospher & Space Phys, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Collinson, Glyn,Glocer, Alex,Xu, Shaosui,et al. Ionospheric Ambipolar Electric Fields of Mars and Venus: Comparisons Between Theoretical Predictions and Direct Observations of the Electric Potential Drop[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(3):1168-1176. |
APA | Collinson, Glyn.,Glocer, Alex.,Xu, Shaosui.,Mitchell, David.,Frahm, Rudy A..,...&Jakosky, Bruce.(2019).Ionospheric Ambipolar Electric Fields of Mars and Venus: Comparisons Between Theoretical Predictions and Direct Observations of the Electric Potential Drop.GEOPHYSICAL RESEARCH LETTERS,46(3),1168-1176. |
MLA | Collinson, Glyn,et al."Ionospheric Ambipolar Electric Fields of Mars and Venus: Comparisons Between Theoretical Predictions and Direct Observations of the Electric Potential Drop".GEOPHYSICAL RESEARCH LETTERS 46.3(2019):1168-1176. |
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