Modeling of ionospheric perturbation by 2004 Sumatra tsunami
Modeling of ionospheric perturbation by 2004 Sumatra tsunami
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DOI：
10.1029/2008rs004060
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发表时间：
2009-06
期刊：
影响因子：
1.6
通讯作者：
Chao-Lun Mai;Jean‐Fu Kiang
中科院分区：
文献类型：
--
作者：
Chao-Lun Mai;Jean‐Fu Kiang
提出了一个完整的模型来分析海啸引力波引起的电子密度扰动。在推导大气重力波色散关系时，考虑了热传导、黏度和离子阻力的损失机制。然后利用该模型分析了2004年12月26日苏门答腊海啸引起的电离层电子密度扰动。研究发现，AGWs以与海啸相同的速度水平移动，并被困在400公里左右的高度。模拟结果很好地解释了海啸触发AGWs后约13分钟，电离层中的电子密度扰动可以被经过的卫星探测到。
A complete model is proposed to analyze the electron density perturbation caused by tsunami‐induced gravity waves. Loss mechanisms of thermal conduction, viscosity, and ion drag are considered in deriving the dispersion relation of the atmospheric gravity waves (AGWs). This model is then used to analyze the electron density perturbation in the ionosphere caused by the Sumatra tsunami on 26 December 2004. It is found that the AGWs move horizontally at the same speed with that of the tsunami and are trapped at about 400 km high. The simulation results well explain that about 13 min after the tsunami triggers AGWs, electron density perturbation in the ionosphere can be detected by satellites that pass over.