2017年9月6日至9日CME引发的地磁风暴造成的TEC干扰
Chali Idosa Uga1,2, Sujan Prasad Gautam2, Ephirem Beshir Seba3,4
1Jimma University, College of Natural and Computational Science, Department of Physics, Jimma, Ethiopia.
Heliyon
|May 24, 2024
概括
地磁风暴会影响地球的电离层,影响磁场和电场. 这项研究显示,不同地区的反应各不相同,强调在了解太空天气影响时需要考虑地理位置.
科学领域:
- 空间物理 空间物理
- 大气科学 大气科学
- 地质物理学 地质物理学
背景情况:
- 由冠状质量喷射 (CMEs) 驱动的地磁风暴显著扰乱了地球的太空环境.
- 离子层对这些干扰的反应是复杂的,并且根据地理位置而异.
研究的目的:
- 研究电离层对特定地磁风暴 (2017年9月6日至9日) 的反应.
- 分析各种GPS站的磁场 (ΔH),快速透电场 (PPEF) 和总电子含量 (TEC) 的变化.
- 了解这些电离层变化的地理依赖.
主要方法:
- 来自GPS站的磁场成分 (ΔH) 数据的分析.
- 快速透电场 (PPEF) 的检查及其与太阳风干扰和Dst指数的相关性.
- 评估一个月的总电子含量 (TEC) 变化,重点关注风暴时间干扰和日间模式.
主要成果:
- 观察到依赖于度的磁场反应,在高度下降幅度更大.
- PPEF显示与太阳风干扰有直接的相关性,在KIRU等高度站有明显的影响.
- 在全球范围内明显出现了TEC干扰,在不同地理区域的耗尽率和值 (5-25 TECU) 中存在显著差异.
结论:
- 离子层对地磁风暴的反应是复杂而地理上依赖的.
- 高度地区更容易受到太空天气影响,正如PPEF指出的那样.
- 在不同的地理位置进行全面的分析对于了解太阳事件期间的电离层动态至关重要.
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