EGU21-7293, updated on 04 Mar 2021
https://doi.org/10.5194/egusphere-egu21-7293
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Ionospheric plasma irregularities inside the mid-latitude trough by using Swarm observations

Yiwen Liu1, Chao Xiong2, and Xin Wan3
Yiwen Liu et al.
  • 1Shangrao Normal University, School of Physics and Electronic Information, China (liuyiwen@whu.edu.cn)
  • 2Department of Space Physics, Electronic Information School, Wuhan University, 430072 Wuhan, China
  • 3Planetary Environmental and Astrobiological Research Laboratory (PEARL), School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, China

The mid-latitude ionospheric trough (MIT) is a well-known feature in the topside ionosphere and plasmasphere. In this report, we investigated the plasma irregularities inside the MIT region based on the high-resolution (2 Hz) measurements of electron density and temperature from the Swarm satellite. We developed a method to automatically identify the mid-latitude trough from Swarm in-situ density measurements, and the small-scale irregularities inside MIT region can also be well determined by considering appropriate thresholds of both the relative (∆Ne/Ne) and absolute (∆Ne) density fluctuations. Further statistics has been performed based-on the multi-years database of identified MITs and irregularities from Swarm. Finally, we provided for the first time the seasonal and magnetic local time distributions of irregularities within the MIT region, and the involved plasma instabilities that cause the irregularities at the MIT region have been discussed.

How to cite: Liu, Y., Xiong, C., and Wan, X.: Ionospheric plasma irregularities inside the mid-latitude trough by using Swarm observations, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-7293, https://doi.org/10.5194/egusphere-egu21-7293, 2021.

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