Multiwave structure of traveling ionospheric disturbances excited by the Tonga volcanic eruptions observed by a dense GNSS network in China
Multiwave structure of traveling ionospheric disturbances excited by the Tonga volcanic eruptions observed by a dense GNSS network in China
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中国密集GNSS网络观测到的汤加火山喷发激发的行进电离层扰动的多波结构
DOI：
10.1029/2022sw003210
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Qian Song
中科院分区：
文献类型：
--
作者：
Xiaolin Li;Feng Ding;Xinan Yue;Tian Mao;Bo Xiong;Qian Song
我们使用来自中国的密集全球导航卫星系统数据来跟踪由2022年1月15日汤加火山喷发触发的行进电离层扰动(TID)的传播。我们确定了两个源自火山喷发的TID。其中一种被最近的多项调查广泛报道，其速度为∼361m/S。然而，另一种远距离传播的∼264m/S的速度尚未被广泛讨论。这些TID的速度与以前对重力波L0和L1模的模拟结果相吻合。我们认为这些TID是由火山喷发激发的重力波的L0和L1导波模式引起的。然而，与L0模式相比，L1模式的幅度较弱，因此通常可以忽略不计。巨大的能量释放导致L1模的幅度更大，这在电离层中引起了可检测到的TID。
We used dense global navigation satellite system data from China to track the propagation of traveling ionospheric disturbances (TIDs) triggered by the 2022 January 15 Tonga volcanic eruption. We identified two TIDs originating from the eruption. One, which has been reported widely by a number of recent investigations, had a velocity of ∼361 m/s. However, another long‐distance propagating TID with a velocity of ∼264 m/s has not been widely discussed. The velocities of these TIDs coincide with previous simulation results of gravity‐wave L0 and L1 modes. We propose that these TIDs were caused by the L0 and L1 ducted modes of gravity waves excited by the volcanic eruption. However, the L1 mode is usually negligible due to its weak amplitude in comparison with that of the L0 mode. The enormous energy release resulted in a stronger amplitude of the L1 mode, which induced a detectable TID in the ionosphere.