Articles | Volume 37, issue 4
https://doi.org/10.5194/angeo-37-673-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-37-673-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
A case study of the large-scale traveling ionospheric disturbances in the eastern Asian sector during the 2015 St. Patrick's Day geomagnetic storm
Department of Geophysics, Peking University, Beijing 100871, China
Department of Geophysics, Peking University, Beijing 100871, China
Anthea J. Coster
MIT Haystack Observatory, Westford, Massachusetts, USA
Shun-Rong Zhang
MIT Haystack Observatory, Westford, Massachusetts, USA
Guan-Yi Ma
National Astronomical Observatories, Chinese Academy of Sciences,
Beijing 100101, China
Yong-Qiang Hao
Department of Geophysics, Peking University, Beijing 100871, China
Zuo Xiao
Department of Geophysics, Peking University, Beijing 100871, China
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EGUsphere, https://doi.org/10.5194/egusphere-2025-5389, https://doi.org/10.5194/egusphere-2025-5389, 2025
This preprint is open for discussion and under review for Annales Geophysicae (ANGEO).
Short summary
Short summary
This paper presents large scale changes to the ionosphere that were observed over a large portion of the continental US from 200 – 450 km altitude during the April 2024 solar eclipse. We observed a decrease in electron density of 50 %, a drop in electron and ion temperatures of 40 % and 20 % respectively. Unique features included lower densities and temperatures north of the eclipse path as compared to the south, and ion temperature decrease along a narrow region parallel to the eclipse path.
Claire C. Trop, James LaBelle, Philip J. Erickson, Shun-Rong Zhang, David McGaw, and Terrence Kovacs
Atmos. Meas. Tech., 18, 1909–1925, https://doi.org/10.5194/amt-18-1909-2025, https://doi.org/10.5194/amt-18-1909-2025, 2025
Short summary
Short summary
Traveling ionospheric disturbances (TIDs) are manifestations of atmospheric waves that are significant for the transfer of energy and momentum between atmospheric layers and regions. This work demonstrates that velocities and directions of TIDs can be measured by monitoring the tiny shift in frequency of AM radio signals when they reflect from a moving ionosphere and that this method can be scaled to use large numbers of radio receivers and transmitters to monitor TIDs on a continental scale.
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