Modeling of the O+ pickup ion sputtering efficiency dependence on solar wind conditions for the Martian atmosphere
文献类型：期刊论文
| 作者 | Wang, Yung-Ching; Luhmann, Janet G.; Leblanc, Francois; Fang, Xiaohua; Johnson, Robert E.; Ma, Yingjuan; Ip, Wing-Huen; Li, Lei |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
 |
| 出版日期 | 2014 |
| 卷号 | 119期号:1页码:93-108 |
| 关键词 | Mars upper atmosphere atmosphere Mars |
| ISSN号 | 2169-9097 |
| 通讯作者 | Wang, YC (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. |
| 英文摘要 | Sputtering of the Martian atmosphere by O(+)pickup ions has been proposed as a potentially important process in the early evolution of the Martian atmosphere. In preparation for the Mars Atmosphere and Volatile Evolution (MAVEN) mission, we performed a study using a Monte Carlo model coupled to a molecular dynamic calculation to investigate the cascade sputtering effects in the region of the Martian exobase. Pickup ion fluxes based on test particle simulations in an MHD model for three different solar wind conditions are used to examine the local and global sputtering efficiencies. The resultant sputtering escape rate is 2x10(24)s(-1) at nominal solar wind condition and can be enhanced about 50 times when both the interplanetary magnetic field (IMF) strength and the solar wind pressure increase. It is found that when the IMF strength becomes stronger, both the pickup ion precipitation energies and the resultant sputtering efficiencies increase. The related escape flux, hot component, and atmospheric energy deposition deduced from the MAVEN measurements may reveal clues about the prominent enhanced sputtering effects. Significant hemispheric asymmetries can be observed related to the solar wind electric fields. The shielding by the crustal fields and the recycling onto the nightside due to different magnetic field draping features can also lead to regional variations of sputtering efficiencies. The results suggest that disturbed or enhanced solar wind conditions provide the best prospects for detecting sputtering effects for MAVEN mission. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/2771]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Wang, Yung-Ching,Luhmann, Janet G.,Leblanc, Francois,et al. Modeling of the O+ pickup ion sputtering efficiency dependence on solar wind conditions for the Martian atmosphere[J]. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,2014,119(1):93-108. |
| APA | Wang, Yung-Ching.,Luhmann, Janet G..,Leblanc, Francois.,Fang, Xiaohua.,Johnson, Robert E..,...&Li, Lei.(2014).Modeling of the O+ pickup ion sputtering efficiency dependence on solar wind conditions for the Martian atmosphere.JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,119(1),93-108. |
| MLA | Wang, Yung-Ching,et al."Modeling of the O+ pickup ion sputtering efficiency dependence on solar wind conditions for the Martian atmosphere".JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 119.1(2014):93-108. |
入库方式： OAI收割
来源：国家空间科学中心
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