Fig. 7From: Physical mechanism for the temporary intensification of wintertime sporadic E layers in 2009Extracted amplitudes of the diurnal tides (upper panel) and semi-diurnal tides (lower panel) with wavenumbers from −3 to \(+\)3 at 35.7\(^\circ\)N and 110 km altitude between 24 and 44 DOY. The blue and green bars represent the tidal amplitudes for 2009 and 2011, respectivelyBack to article page