Japan Geoscience Union Meeting 2022

Presentation information

Print

[E] Oral

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

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

Tue. May 24, 2022 1:45 PM - 3:15 PM 302 (International Conference Hall, Makuhari Messe)

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), Mitsumu K. Ejiri(National Institute of Polar Research)


2:45 PM - 3:00 PM

[PEM13-05] Development of the IONISE to better understand the generation and evolution of EPBs in East and Southeast Asia

★Invited Papers

*Guozhu Li1,2 (1.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, 2.Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences)

Keywords:Equatorial Plasma Bubbles, IONISE, East and Southeast Asia

In the East and Southeast Asia, there exist significant differences in the generation rates of Equatorial Plasma Bubbles (EPBs) at closely located stations, indicating that the decorrelation distance of EPB generation is small (tens to hundreds of kilometers) in longitude. After the initial generation of EPBs at one longitude, they can drift zonally more than 2000 km and extend from the magnetic equator to middle latitudes of 40 or higher under some conditions. These features make it difficult to identify the possible seeding sources for the EPBs and to accurately predict their occurrence, especially when the onset locations of EPBs are far outside the observation sector. To capture ionospheric disturbances of various scales by natural sources (e.g., tropical cyclone, volcanic eruption), reveal their possible seeding in the generation of EPBs, and better understand the generation and evolution of EPBs, an Ionospheric Observation Network for Irregularity and Scintillation in the East and Southeast Asia (IONISE) is being developed (http://ionise.geophys.ac.cn/). The IONISE network mainly includes three crossed chains of Beidou geostationary satellite total electron content (TEC)/scintillation receivers along 110°E, 23°N, and 40°N respectively, multistatic portable digital ionosondes and bistatic VHF radars at low latitudes. In this talk we will briefly review the current knowledge of EPBs and ionospheric scintillations in the East and Southeast Asia. Some results from the IONISE and other observational networks and large facilities in the East and Southeast Asia, including ionospheric disturbances and EPB irregularities triggered by natural sources will be presented. Some unresolved issues related to the day-to-day variability of EPBs will be discussed.