Japan Geoscience Union Meeting 2015

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International Session (Oral)

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

[P-EM06] Mesosphere-Thermosphere-Ionosphere Coupling in the Earth's Atmosphere

Wed. May 27, 2015 2:15 PM - 4:00 PM A01 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Yuichi Otsuka(Solar-Terrestrial Environment Laboratory, Nagoya University), Libo Liu(Institute of Geology and Geophysics, Chinese Academy of Sciences), Atsuki Shinbori(Research Institute for Sustainable Humanosphere (RISH), Kyoto University), Chair:Larisa Goncharenko(Massachusetts Institute of Technology Haystack Observatory)

2:45 PM - 3:00 PM

[PEM06-19] Simultaneous observation of planetary waves in the mesosphere and ionosphere

*Patrick ESPY1, Nora STRAY2, Robert HIBBINS1 (1.NTNU, Trondheim and Birkeland Centre for Space Science, Bergen, Norway, 2.Norwegian University of Science and Technology (NTNU), Trondheim, Norway)

Keywords:Planetary wave, Mesosphere, Lower Thermosphere, Ionosphere

How variations of the neutral atmosphere, in particular planetary wave activity in the mesosphere-lower thermosphere (MLT), drive variations in the ionosphere has been the subject of recent attention. A method has been developed to observe planetary wave activity in the northern hemisphere (50-66⁰N) MLT using neutral atmosphere winds derived from meteor trail drifts observed by a longitudinal chain of Super Dual Auroral Radar Network (SuperDARN) radars. The method allows for the removal of tidal effects and provides the temporal variation of the wavenumber 1 and 2 amplitudes without the spatial-temporal aliasing present in satellite observations. The method has been extended to utilize the critical plasma frequency and virtual height of the ionospheric F-layer derived from a longitudinal chain of ionosondes. Details of the method applied to both the meteor radar and ionosonde data will be presented, and the amplitudes and temporal variations of the wavenumber 1 and 2 amplitudes in both the MLT and the F region will be compared.