Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL090763 |
Particle‐in‐cell modeling of Martian magnetic cusps and their role in enhancing nightside ionospheric ion escape | |
A. R. Poppe; D. A. Brain; Y. Dong; S. Xu; R. Jarvinen | |
2020-12-11 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | Amongst various escape channels, ion outflow is a major contributor to atmospheric loss at Mars over geologic time. On Mars’ nightside, observations have indicated that cusp regions within crustal magnetic fields are associated with phenomena such as accelerated particle populations, discrete auroral emissions, and ionospheric outflow; however, the kinetic physics occurring within crustal magnetic cusps is poorly understood. Here, we present 1.5‐dimensional particle‐in‐cell simulations of magnetospheric‐ionospheric interactions within martian crustal magnetic cusp regions of varying strength. Simulation results demonstrate the formation of quasi‐static, field‐aligned potentials pointing away from Mars that accelerate electrons into the martian atmosphere while accelerating ions away, thereby enhancing ionospheric escape. Escaping ionospheric flux scales with crustal field strength, with 160 nT crustal fields yielding > 2× the ion escape flux than in the case with no crustal fields. We discuss these results and conclude that magnetic cusp regions may be significant sources of ion loss at Mars. |
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/308255 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | A. R. Poppe,D. A. Brain,Y. Dong,等. Particle‐in‐cell modeling of Martian magnetic cusps and their role in enhancing nightside ionospheric ion escape[J]. Geophysical Research Letters,2020. |
APA | A. R. Poppe,D. A. Brain,Y. Dong,S. Xu,&R. Jarvinen.(2020).Particle‐in‐cell modeling of Martian magnetic cusps and their role in enhancing nightside ionospheric ion escape.Geophysical Research Letters. |
MLA | A. R. Poppe,et al."Particle‐in‐cell modeling of Martian magnetic cusps and their role in enhancing nightside ionospheric ion escape".Geophysical Research Letters (2020). |
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