Japan Geoscience Union Meeting 2022

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P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM13] Coupling Processes in the Atmosphere-Ionosphere System

Wed. Jun 1, 2022 11:00 AM - 1:00 PM Online Poster Zoom Room (4) (Ch.04)

convener:Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), convener:Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Loren Chang(Institute of Space Science, National Central University), convener:Yue Deng(University of Texas at Arlington), Chairperson:Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Atsuki Shinbori(Institute for Space-Earth Environment Research (ISEE), Nagoya University)


11:00 AM - 1:00 PM

[PEM13-P09] Multi-day oscillations in the equatorial ionosphere during the 2019 Antarctic sudden stratwarming: mixed response to forcing from above and below

*Huixin Liu1, Yuichi Otsuka2, K. Hozumi3, Masaru Kogure1, T. Yu4 (1.Earth and Planetary Science Division, Kyushu University SERC, Kyushu University, Japan, 2.ISEE, Nagoya University, Japan, 3.National Institute of Communication Technology, Japan, 4.Wuhan university of geology, China)

Keywords:Equatorial Ionosphere, Stratosphere sudden warming, atmosphere-ionosphere coupling, magnetic storms

The equatorial ionosphere is sensitive to both solar/magnetic forcing from above and atmospheric wave forcing from below. In this study, we analyze the ionospheric variabilities in the Asian sector during August--October, 2019. In this period, a rare stratosphere sudden warming event occurred in the Antarctic in September, and the geomagnetic activity also increased periodically. We focus on the multi-day oscillations in the total electron content (TEC) and the equatorial electrojet (EEJ) observed in southeast Asia. By examining simultaneous meteor radar observations of mesospheric winds along with the Kp index and the interplanetary electric field, we explore the relative role of geomagnetic activity and lower atmosphere forcing in producing multi-day oscillations in the equatorial ionosphere.