Modeling the ionospheric impact of tsunami‐driven gravity waves with SAMI3: Conjugate effects
Modeling the ionospheric impact of tsunami‐driven gravity waves with SAMI3: Conjugate effects
复制标题
使用 SAMI3 模拟海啸驱动的重力波的电离层影响：共轭效应
DOI：
10.1002/2015gl064871
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发表时间：
2015
影响因子：
5.2
通讯作者：
J. Makela
中科院分区：
文献类型：
--
作者：
J. Huba;D. Drob;T.‐W. Wu;J. Makela
海军研究实验室第一原理电离层模型 SAMI3 用于研究与海啸驱动的重力波相关的电离层效应。具体来说，对 2011 年 3 月 11 日的东北冲海啸进行了建模。结果表明，重力波引起的中性风变化会导致垂直和平行于地磁场的等离子体速度变化。此外，中性风扰动引起的电场可以映射到共轭半球。因此，两个半球都会产生电子密度变化，从而影响总电子含量 (TEC) 和 6300 Å 气辉发射。研究发现，TEC 表现出≲±0.1 总电子含量单位（1 TECU = 1016 el m−2）的变化，并且相对于未受干扰的背景气辉，6300 Å 气辉发射变化高达~±2.5%。
The Naval Research Laboratory first‐principles ionosphere model SAMI3 is used to study the ionospheric effects associated with tsunami‐driven gravity waves. Specifically, the Tohoku‐Oki tsunami of 11 March 2011 is modeled. It is shown that gravity wave‐induced variations in the neutral wind lead to plasma velocity variations both perpendicular and parallel to the geomagnetic field. Moreover, the electric field induced by the neutral wind perturbations can map to the conjugate hemisphere. Thus, electron density variations can be generated in both hemispheres which impact the total electron content (TEC) and 6300 Å airglow emission. It is found that the TEC exhibits variations of ≲±0.1 total electron content unit (1 TECU = 1016 el m−2) and the 6300 Å airglow emission variation is up to ∼±2.5% relative to the unperturbed background airglow.