SAMI3 prediction of the impact of the 21 August 2017 total solar eclipse on the ionosphere/plasmasphere system
SAMI3 prediction of the impact of the 21 August 2017 total solar eclipse on the ionosphere/plasmasphere system
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DOI：
10.1002/2017gl073549
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发表时间：
2017-06
影响因子：
5.2
通讯作者：
J. Huba;D. Drob
中科院分区：
文献类型：
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作者：
J. Huba;D. Drob
我们提出了定量预测即将到来的日全食对电离层和等离子体的影响，使用海军研究实验室（NRL）模型Sami 3也是电离层模型（SAMI 3）。日食将于2017年8月21日发生在美国大陆。我们的模拟结果表明，在日食附近，（1）总电子含量（TEC）减少了1.5个TEC单位（TECU; 1 TECU = ×1016 m−2），这是TEC降低了35%，（2）在F区电子密度降低了50%，（3）在等离子体中电子温度降低了800 K，（4）F区O ~+速度由上至下的变化范围为0.40 m·s-1 ~ 0.20 m·s-1。有趣的是，电离层电导的大陆大小修改修改的全球电场，这应该会导致在南共轭半球（TECU）的TEC可测量的变化。
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 ∼ 5 TEC units (TECU; 1 TECU = ×1016 m−2) which is a ∼ 35% decrease in TEC, (2) the electron density decreases by a factor of ∼ 50% in the F region, (3) the electron temperature decreases by up to ∼800 K in the plasmasphere, and (4) the O+ velocity changes from ∼40 m s−1 upward to ∼20 m s−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 ( ≲ 1 TECU).