期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 21, 页码 8942-8950出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL065346
关键词
-
资金
- NASA [NNX11AN38G]
- NASA [NNX11AN38G, 141537] Funding Source: Federal RePORTER
We present observations by the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission of a substantial plume-like distribution of escaping ions from the Martian atmosphere, organized by the upstream solar wind convection electric field. From a case study of MAVEN particle-and-field data during one spacecraft orbit, we identified three escaping planetary ion populations: plume fluxes mainly along the upstream electric field over the north pole region of the Mars-Sun-Electric field (MSE) coordinate system, antisunward ion fluxes in the tail region, and much weaker upstream pickup ion fluxes. A statistical study of O+ fluxes using 3 month MAVEN data shows that the plume is a constant structure with strong fluxes widely distributed in the MSE northern hemisphere, which constitutes an important planetary ion escape channel. The escape rate through the plume is estimated to be similar to 30% of the tailward escape and similar to 23% of the total escape for > 25 eV O+ ions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据