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

[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)

キーワード：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.