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DOI | 10.1029/2018GL077730 |
The Mars Topside Ionosphere Response to the X8.2 Solar Flare of 10 September 2017 | |
Thiemann, E. M. B.1; Andersson, L.1; Lillis, R.2; Withers, P.3; Xu, S.2; Elrod, M.4,5; Jain, S.1; Pilinski, M. D.1; Pawlowski, D.6; Chamberlin, P. C.1; Eparvier, F. G.1; Benna, M.4,5; Fowler, C.1; Curry, S.2; Peterson, W. K.1; Deighan, J.1 | |
2018-08-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:16页码:8005-8013 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | On 10 September 2017, irradiance from a magnitude X8.2 solar flare impacted Mars while the Mars Atmosphere and Volatile EvolutioN (MAVEN) orbiter was characterizing the Mars upper atmosphere. This solar flare was the largest to occur during the MAVEN mission to date, nearly tripling the ionizing irradiance impacting Mars in tens of minutes, and provides an opportunity to study the planet's response to extreme irradiance changes. This letter reports in situ observations of the Mars topside ionosphere's response to this flare above 155 km made 1.67 hr after the flare soft X-ray peak. The observed plasma density increase is higher than expected based solely on increased ionization, and the electron temperature decreases below 225 km; both effects can be explained by an expanded neutral atmosphere, which efficiently dissipates any flare-induced heating of the thermal electrons at altitudes where CO2 is the dominant species. Further, the ion density and composition change significantly at both fixed altitude and pressure level, which can be explained by a change in the O:CO2 density ratio, highlighting the importance this ratio has in determining ionospheric structure. |
英文关键词 | solar flare Mars ionosphere Mars upper atmosphere EUV |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445612500014 |
WOS关键词 | X-RAY ; EMISSION MEASURES ; TEMPERATURES ; VENUS ; ATMOSPHERES ; EXPRESSIONS ; IRRADIANCE ; ESCAPE ; REGION |
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/26445 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 USA; 2.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 3.Boston Univ, Ctr Space Phys, Boston, MA 02215 USA; 4.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 5.Univ Maryland, CRESSTII, College Pk, MD 20742 USA; 6.Eastern Michigan Univ, Dept Phys, Ypsilanti, MI 48197 USA |
推荐引用方式 GB/T 7714 | Thiemann, E. M. B.,Andersson, L.,Lillis, R.,et al. The Mars Topside Ionosphere Response to the X8.2 Solar Flare of 10 September 2017[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(16):8005-8013. |
APA | Thiemann, E. M. B..,Andersson, L..,Lillis, R..,Withers, P..,Xu, S..,...&Deighan, J..(2018).The Mars Topside Ionosphere Response to the X8.2 Solar Flare of 10 September 2017.GEOPHYSICAL RESEARCH LETTERS,45(16),8005-8013. |
MLA | Thiemann, E. M. B.,et al."The Mars Topside Ionosphere Response to the X8.2 Solar Flare of 10 September 2017".GEOPHYSICAL RESEARCH LETTERS 45.16(2018):8005-8013. |
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