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DOI | 10.1002/2017GL075446 |
Mars Under Primordial Solar Wind Conditions: Mars Express Observations of the Strongest CME Detected at Mars Under Solar Cycle #24 and its Impact on Atmospheric Ion Escape | |
Ramstad, Robin; Barabash, Stas; Futaana, Yoshifumi; Yamauchi, Masatoshi; Nilsson, Hans; Holmstroem, Mats | |
2017-11-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden |
英文摘要 | An extremely strong Coronal Mass Ejection (CME) impacted Mars on 12 July 2011, while the Mars Express spacecraft was present inside the nightside ionosphere. Estimated solar wind density and speed during the event are 39 particles cm(-3) and 730 km/s, corresponding to nominal solar wind flux at Mars when the solar system was similar to 1.1 Ga old. Comparing with expected average atmospheric heavy ion fluxes under similar XUV conditions, the CME impact is found to have no significant effect on the escape rate 3.3 x 10(24) s(-1), with an upper limit at 10(25) s(-1) if the observed tail contraction is not taken into account. On the subsequent orbit, 7 h later after magnetosphere response, fluxes were only 2.4% of average. As such, even under primordial solar wind conditions we are unable to find support for a strong solar wind-driven ion escape, rather the main effect appears to be acceleration of the escaping ions by x10-x20 typical characteristic energy. |
英文关键词 | Mars escape solar wind primordial CME ASPERA |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418572900012 |
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/27394 |
专题 | 气候变化 |
作者单位 | Swedish Inst Space Phys, Kiruna, Sweden |
推荐引用方式 GB/T 7714 | Ramstad, Robin,Barabash, Stas,Futaana, Yoshifumi,et al. Mars Under Primordial Solar Wind Conditions: Mars Express Observations of the Strongest CME Detected at Mars Under Solar Cycle #24 and its Impact on Atmospheric Ion Escape[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(21). |
APA | Ramstad, Robin,Barabash, Stas,Futaana, Yoshifumi,Yamauchi, Masatoshi,Nilsson, Hans,&Holmstroem, Mats.(2017).Mars Under Primordial Solar Wind Conditions: Mars Express Observations of the Strongest CME Detected at Mars Under Solar Cycle #24 and its Impact on Atmospheric Ion Escape.GEOPHYSICAL RESEARCH LETTERS,44(21). |
MLA | Ramstad, Robin,et al."Mars Under Primordial Solar Wind Conditions: Mars Express Observations of the Strongest CME Detected at Mars Under Solar Cycle #24 and its Impact on Atmospheric Ion Escape".GEOPHYSICAL RESEARCH LETTERS 44.21(2017). |
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