9:00 AM - 9:15 AM
[PEM04-22] Identification of ionospheric plasma density changes due to solar flares and energetic particle precipitation using the SuperDARN radar data
Keywords:SuperDARN radars, ionospheric plasma density change, solar flare / energetic particle precipitation
Ionospheric convection around substorm expansion onset are characterized by reduction of sheared flow and enhancement of equatorward flows (e.g., Bristow et al., J. Geophys. Res., 2007). However, there have been no studies on the effect of D-region HF wave absorption due to particle precipitation, which could lead to positive Doppler shift, which is independent of beam number but could be positively (negatively) correlated with the range (elevation angle) Initial result of the quantitative estimation of Doppler velocities associated with particle precipitation will be presented.