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DOI | 10.1029/2020GL090190 |
Rapid Landau heating of Martian topside ionospheric electrons by large‐amplitude magnetosonic waves | |
Zhenpeng Su; Nigang Liu; Zhonglei Gao; Bin Wang; Huinan Zheng; Yuming Wang; Shui Wang | |
2020-10-09 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | Atmospheric escape is a fundamental process in the long‐term habitability evolution of terrestrial planets. Recent observations on Mars have found the concurrence of the severe ionospheric erosion and the large‐amplitude, quasi‐perpendicular magnetosonic waves. However, whether and then how these magnetosonic waves had contributed to the ionospheric erosion remains unclear. Here we propose a new candidate mechanism, electron Landau heating by magnetosonic waves, for the Martian ionospheric erosion. In contrast to the cyclotron resonance with oxygen atomic and molecular ions above the escape energies, the magnetosonic waves Landau‐resonate with the thermal electrons at energy channels of the order of 0.01‐‐0.1 eV. Through the Landau resonance over tens of minutes, the large‐amplitude (12 nT) magnetosonic waves can heat the topside ionospheric electrons to ~2 times the normal temperature. The topside ionospheric electron heating could result in the enhancement of the ambipolar electric potential and eventually facilitate the escape of ionospheric plasma. |
领域 | 气候变化 |
URL | 查看原文 |
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/297881 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Zhenpeng Su,Nigang Liu,Zhonglei Gao,等. Rapid Landau heating of Martian topside ionospheric electrons by large‐amplitude magnetosonic waves[J]. Geophysical Research Letters,2020. |
APA | Zhenpeng Su.,Nigang Liu.,Zhonglei Gao.,Bin Wang.,Huinan Zheng.,...&Shui Wang.(2020).Rapid Landau heating of Martian topside ionospheric electrons by large‐amplitude magnetosonic waves.Geophysical Research Letters. |
MLA | Zhenpeng Su,et al."Rapid Landau heating of Martian topside ionospheric electrons by large‐amplitude magnetosonic waves".Geophysical Research Letters (2020). |
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