Figure 1
From: Acoustic-gravity waves in the atmosphere generated by infragravity waves in the ocean
Geography of atmospheric wave radiation by infragravity waves in the ocean. (a) The transition frequency ω b from surface to leaky infragravity waves (in mHz) is shown by color for various geographical locations. At frequencies below the transition frequency, infragravity waves continuously radiate acoustic-gravity waves into the upper atmosphere. (b) The surface density I of the vertical flux of mechanical power radiated into the atmosphere (in W/m2) is shown by color on the logarithmic scale. The transition frequency and the power flux density are calculated for an isothermal atmosphere with sound speed c s  = 330 m/s.