Fig. 4
From: Atmospheric resonances and their coupling to vibrations of the ground and waves in the ocean
Response of the atmosphere to monochromatic vibrations of its lower boundary. The amplitude of the reduced vertical displacement is shown on logarithmic scale, log10|Q(z)/Q(0)|, as a function of altitude and the frequency of oscillations. Displacement amplitude is normalized by its value at the ground level. Atmospheric waves are excited by vibrations that travel a eastward with subsonic trace velocity V = 200 m/s; b westward with subsonic trace velocity V = 200 m/s; and c southward at supersonic trace velocity V = 3000 m/s. Conditions at Wallops Island, Virginia, on 14 July 2014 are assumed in a and b; conditions at McMurdo, Antarctica, on 15 January 2014 are assumed in c