Ohya Hiroyo, Tsuchiya Fuminori, Takamura Tamio, Shinagawa Hiroyuki, Takahashi Yukihiro, Chen Alfred B
Graduate School of Engineering, Chiba University, Chiba, 263-8522, Japan.
Graduate School of Science, Planetary Plasma and Atmospheric Research Center, Tohoku University, Sendai, 980-8578, Japan.
Sci Rep. 2024 Jul 16;14(1):15659. doi: 10.1038/s41598-024-65929-x.
The submarine volcano Hunga Tonga-Hunga Ha'apai erupted explosively on January 15, 2022, offering a unique opportunity to investigate interactions between the atmosphere and ionosphere caused by Lamb and Pekeris waves. However, the resonance of Pekeris waves has not been previously detected. In this study, we applied a multi-point monitoring approach focusing on the lower ionosphere and atmospheric electric field. Here we show observed oscillations of 100-200 s in manmade transmitter signals and the magnetic and atmospheric electric fields, which were caused by Pekeris waves. However, no corresponding changes with the period of 100-200 s in atmospheric pressure due to Pekeris waves were observed on the ground. A simulation of neutral wind revealed Pekeris waves oscillating near the mesopause, suggesting resonance. Therefore, the oscillation in atmospheric electric field is interpreted that the resonance in the lower ionosphere was projected onto the Earth's surface via a global electric circuit.
2022年1月15日，汤加洪阿哈阿帕伊岛海底火山发生剧烈喷发，为研究兰姆波和佩克里兹波引起的大气与电离层相互作用提供了独特契机。然而，此前尚未探测到佩克里兹波的共振现象。在本研究中，我们采用了一种聚焦于低电离层和大气电场的多点监测方法。在此，我们展示了在人造发射机信号以及磁场和大气电场中观测到的100 - 200秒的振荡，这些振荡是由佩克里兹波引起的。然而，在地面上未观测到因佩克里兹波导致的大气压力在100 - 200秒周期内的相应变化。对中性风的模拟显示，佩克里兹波在中间层顶附近振荡，表明存在共振。因此，大气电场中的振荡被解释为低电离层中的共振通过全球电路投射到了地球表面。
