GSTDTAP  > 气候变化
DOI10.1002/2017GL073549
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
ISSN0094-8276
EISSN1944-8007
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
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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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