Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073549 |
SAMI3 prediction of the impact of the 21 August 2017 total solar eclipse on the ionosphere/plasmasphere system | |
Huba, J. D.1; Drob, D.2 | |
2017-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We present quantitative predictions of the impact of the upcoming total solar eclipse on the ionosphere and plasmasphere using the Naval Research Laboratory (NRL) model Sami3 is Also a Model of the Ionosphere (SAMI3). The eclipse will occur over the continental United States on 21 August 2017. Our simulation results indicate that in the vicinity of the eclipse (1) the total electron content (TEC) decreases by up to similar to 5 TEC units (TECU; 1 TECU = x10(16) m(-2)) which is a similar to 35% decrease in TEC, (2) the electron density decreases by a factor of similar to 50% in the F region, (3) the electron temperature decreases by up to similar to 800 K in the plasmasphere, and (4) the O+ velocity changes from similar to 40 ms(-1) upward to similar to 20 ms(-1) downward in the F region. Interestingly, the continental size modification of the ionospheric conductance modifies the global electric field, which should lead to measurable changes in the TEC in the southern conjugate hemisphere (less than or similar to 1TECU). Plain Language Summary We use the first-principles ionosphere/plasmasphere model Sami3 is Also a Model of the Ionosphere to predict the impact of the upcoming total solar eclipse traversing the continental United States on 21 August 2017. We find that the reduction in solar radiation reaching the Earth has a significant impact on the Earth's ionosphere: the electron density can decrease by almost a factor of 2 in the F region between 150 and 350km, and the electron temperature can decrease by 15% at higher altitudes. Moreover, we find that the reduction in the electron density affects the electrical conductance of the ionosphere which modifies the global electric field in the American sector. This can modify the Earth's ionosphere in the magnetically conjugate region at the tip of South America which should be observable. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405854200007 |
WOS关键词 | THERMOSPHERIC RESPONSE ; PLASMASPHERE |
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/26277 |
专题 | 气候变化 |
作者单位 | 1.Naval Res Lab, Plasma Phys Div, Washington, DC 20375 USA; 2.Naval Res Lab, Space Sci Div, Washington, DC 20375 USA |
推荐引用方式 GB/T 7714 | Huba, J. D.,Drob, D.. SAMI3 prediction of the impact of the 21 August 2017 total solar eclipse on the ionosphere/plasmasphere system[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(12). |
APA | Huba, J. D.,&Drob, D..(2017).SAMI3 prediction of the impact of the 21 August 2017 total solar eclipse on the ionosphere/plasmasphere system.GEOPHYSICAL RESEARCH LETTERS,44(12). |
MLA | Huba, J. D.,et al."SAMI3 prediction of the impact of the 21 August 2017 total solar eclipse on the ionosphere/plasmasphere system".GEOPHYSICAL RESEARCH LETTERS 44.12(2017). |
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