Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL072794 |
First optical observations of interhemispheric electron reflections within pulsating aurora | |
Samara, M.1; Michell, R. G.1,2; Khazanov, G. V.1 | |
2017-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A case study of a pulsating auroral event imaged optically at high time resolution presents direct observational evidence in agreement with the interhemispheric electron bouncing predicted by the SuperThermal Electron Transport model. Pulsation-on times are identified and subsequent equally spaced fainter pulsations are also noted and can be explained by a portion/percentage of the primary precipitating electrons reflecting upward from the ionosphere, traveling to the opposite hemisphere and reflecting upward again. The high time resolution of these data, combined with the short duration of the pulsation-on time (approximate to 1s) and the relatively long spacing between pulsations (approximate to 6 to 9s) made it possible to observe the faint optical pulses caused by the reflected electrons coming from the opposite hemisphere. Plain Language Summary This is the first time we show evidence that a certain type of aurora is caused by electrons bouncing back and forth between the two hemispheres. This means that these electrons are responsible for some of the total light in the aurora, a possibility that has largely been ignored in theoretical models. |
英文关键词 | pulsating aurora high time resolution optical observations electrons interhemispheric reflections |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399762700001 |
WOS关键词 | DIFFUSE AURORA ; PRECIPITATING ELECTRONS ; MAGNETOSPHERE ; IONOSPHERE ; CONJUGATE ; SATELLITE ; FORMS |
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/29024 |
专题 | 气候变化 |
作者单位 | 1.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 2.Univ Maryland, Dept Astron, College Pk, MD 20742 USA |
推荐引用方式 GB/T 7714 | Samara, M.,Michell, R. G.,Khazanov, G. V.. First optical observations of interhemispheric electron reflections within pulsating aurora[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(6). |
APA | Samara, M.,Michell, R. G.,&Khazanov, G. V..(2017).First optical observations of interhemispheric electron reflections within pulsating aurora.GEOPHYSICAL RESEARCH LETTERS,44(6). |
MLA | Samara, M.,et al."First optical observations of interhemispheric electron reflections within pulsating aurora".GEOPHYSICAL RESEARCH LETTERS 44.6(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论