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由Pekeris波引起的较低的电离层共振是由2022年通加火山爆发引起的
Hiroyo Ohya1, Fuminori Tsuchiya2, Tamio Takamura3
1Graduate School of Engineering, Chiba University, Chiba, 263-8522, Japan. ohya@faculty.chiba-u.jp.
Scientific reports
|July 16, 2024
概括
2022年Hunga Tonga-Hunga Ha'apai火山爆发产生了Pekeris波,通过大气电场和发射器信号检测到. 这些波在中立点附近产生共振,通过全球电路影响较低的电离层和地球表面.
科学领域:
- 大气科学 大气科学
- 地质物理学 地质物理学
- 太空物理空间物理学
背景情况:
- 2022年1月15日,Hunga Tonga-Hunga Ha'apai海底火山的爆炸性喷发为研究大气-离子层合提供了一个罕见的机会.
- 羊羔和佩克里斯波是大气现象,可以由火山爆发产生的,但佩克里斯波的共振以前没有被观察到.
研究的目的:
- 为了研究Hunga Tonga-Hunga Ha'apai喷发后Pekeris波的产生和特征.
- 检测和分析地球大气和电离层中Pekeris波的共振.
- 了解这些波的传播机制及其对较低电离层和表面电场的影响.
主要方法:
- 低离子层和大气电场的多点监测.
- 对人造发射器信号,磁场和大气电场的振荡进行分析.
- 在地面测量大气压.
- 中立风模拟模型波浪传播.
主要成果:
- 在发射器信号,磁场和大气电场中观察到周期为100-200秒的振荡,归因于Pekeris波.
- 没有检测到地面层大气压的相应100-200秒周期变化.
- 中性风的模拟表明,Pekeris波在中断点附近振荡,这表明共振.
结论:
- 这项研究提供了第一个关于Pekeris波共振的观测证据,该波共振发生在中断期附近.
- 大气电场中观察到的振荡被解释为通过全球电路投射到地球表面的较低电离层共振的表现.
- 这些发现增强了我们对主要火山事件期间大气 - 离子层相互作用的理解.
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