Japan Geoscience Union Meeting 2016

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International Session (Oral)

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

[P-EM03] Mesosphere-Thermosphere-Ionosphere Coupling in the Earth's Atmosphere

Tue. May 24, 2016 9:00 AM - 10:30 AM 106 (1F)

Convener:*Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Akinori Saito(Department of Geophysics, Graduate School of Science, Kyoto University), Loren Chang(Institute of Space Science, National Central University), Atsuki Shinbori(Research Institute for Sustainable Humanosphere (RISH), Kyoto University), Chair:Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Akinori Saito(Department of Geophysics, Graduate School of Science, Kyoto University)

9:30 AM - 9:45 AM

[PEM03-23] Multiple excitation of large-scale traveling atmospheric disturbances (TADs) by solar wind fluctuations

★Invited papers

*Jianpeng Guo1 (1.National Space Science Center, Chinese Academy of Sciences)

Keywords:solar wind fluctuations, gravity waves, thermosphere

Fluctuations on timescales of minutes to hours are common in the solar wind. When the fluctuations encounter the Earth, they could excite gravity waves in the auroral regions. These gravity waves, particularly large-scale (> ~1000 km) gravity waves, will give rise to traveling atmospheric disturbances (TADs) with typical amplitudes of 20~40% in the upper thermosphere. We report here the detection of multiple excitation of large-scale TADs by Alfvén waves embedded in high-speed solar wind streams, and also by interacting coronal mass ejections.