New Progress in Research on Mid-and-low-latitude Ionospheric Storms
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摘要: 本文梳理了中国科学院地质与地球物理研究所电离层研究团队近年来在电离层暴研究领域取得的主要研究进展. 重点介绍以下5个方面: 中低纬电离层暴响应的大尺度特性与经度依赖性; 暴时电离层–热层系统的耦合过程; 暴时低纬电离层电动力学与动力学响应过程及机理; 暴时中低纬电离层不均匀体的演化与机制; 电离层暴时参数的建模与预报研究. 相关研究综合利用全球与区域多源观测数据、数值模拟、统计分析及深度学习方法, 系统揭示了中低纬电离层暴的时间演化规律与空间分布特征, 并进一步阐释了其物理机制.Abstract: This article reviews the studies conducted by the team from the Institute of Geology and Geophysics, Chinese Academy of Sciences in the field of ionospheric storms in recent years. The following five aspects will be outlined: the large-scale characteristics and longitude dependence of ionospheric responses to geomagnetic storms in the middle and low latitudes; the coupling process of the ionosphere-thermosphere system during storms; electrodynamics and dynamical response processes and mechanisms of the ionosphere at low latitudes during storms; evolution and mechanism of ionospheric irregularities in the middle and low latitudes during storms; modeling and prediction of parameters during ionospheric storms. These studies, by leveraging global and regional multi-source observations, numerical simulations, statistical analyses, and deep learning, systematically reveal the complicated multi-scale temporal evolution characteristics and spatial dependence of mid-low latitude ionospheric storms, and also explore their underlying physical mechanisms.
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Key words:
- Ionosphere /
- Geomagnetic storms /
- Ionospheric storms /
- Ionospheric irregularity
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图 1 2012年7月强磁暴期间GRACE卫星向上观测的TEC(南北30°平均值)在亚洲–澳大利亚和美洲扇区的暴时变化及其经度差异[7]
Figure 1. Storm-time variations of TEC (averaged over ±30°) observed by GRACE satellite in the upward-looking geometry during the intense geomagnetic storm in July 2012, showing the longitudinal differences between the Asian-Australian and American sectors[7]
图 4 2023年4月地磁暴期间漠河站观测到的电离层TEC和F2层临界频率f0F2和峰高hmF2以及FP干涉仪观测的温度和四个方向风场Ve, Vw, Vs和Vn等参数及风场散度的振荡现象[33]
Figure 4. Oscillations of ionospheric TEC, F2 layer critical frequency f0F2 and peak height hmF2 observed at Mohe station, as well as temperatures and four-directional wind fields (Ve, Vw, Vs, and Vn) and wind field divergence observed by the FPI during the geomagnetic storm in April 2023[33]
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