JpGU-AGU Joint Meeting 2020

Presentation information

Print

[E] Poster

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

[P-EM20] Recent Advances in Ionosphere Observation and Modeling through New Observation Opportunities

convener:CHIYEN LIN(Center for Astronautical Physics and Engineering, National Central University, TAIWAN), Yen-Jung Wu(Space Sciences Laboratory, University of California, Berkeley), Yang-Yi Sun(China University of Geosciences), Charles Lin(Department of Earth Sciences, National Cheng Kung University)

[PEM20-P04] Traveling Ionospheric Disturbances Triggered by Typhoon Hagibis (2019)

*Yu-Chen Cheng1, Charles Lin1, Shih-Ping Chen1, Min-Yang Chou2 (1.Department of Earth Science, National Cheng Kung University, Tainan, Taiwan, 2.COSMIC Program Office, University Corporation for Atmospheric Research Boulder, CO, USA)

Keywords:ionosphere, gravity wave, MSTID, typhoon

The tropospheric severe weather system could affect the ionospheric plasma structure through triggering vertical propagating gravity wave disturbances. By analyzing receiving signals from Global Position System (GPS), we calculate the total electron content (TEC) to observe the corresponding ionosphere variations triggered by the severe weather events. On 11 October 2019, a series of traveling ionospheric disturbances (TIDs) generated by a strong typhoon Hagibis was observed in the ionosphere over Japan region. Over the central Japan, concentric TIDs (CTIDs) signature with periods 10-25 min, phase velocity 277.8m/s characters were observed. Over the Hokkaido area, north of the typhoon, another TIDs with the south-westward propagation was also observed. It has the concentric gravity wave characteristics of 10-25 min period and 500 km radius at 200 km altitude traveling for 103 minutes. Although the TIDs at the north has the characteristics of concentric gravity wave, it also has the property of medium scale TIDs (MSTIDs).