The response of the ionosphere to meteorological events was extensively studied for decades. These studies showed that the dynamic process was an important way of coupling the ionosphere with the lower atmospheres (Artru et al., 2005;Chane-Ming et al., 2002;Hines, 1960). Gravity waves (GWs) caused by deep convections were common in the atmosphere during severe convective meteorological events (Hoffmann & Alexander, 2010;Yue et al., 2013). The small-scale GWs tended to dissipate and break below the top of stratosphere, while medium-scale GWs that have fast-enough horizontal phase speeds can propagate upward into the thermosphere, causing ripples of electron density (