HEIGHT OF THE PENETRATION INTO THE IONOSPHERE FOR INTERNAL ATMOSPHERE GRAVITY WAVES

Approximate analytical solutions describing the propagation and dissipation of atmosphere gravity waves (GW) in the viscous and heat-conducting Earth's atmosphere are obtained. It is shown that the main absorption occurs in the sheet with thickness close to local value of atmosphere height scale. The sheet altitude depends on atmosphere parameters and GW spectral parameters but not on the GW amplitude. So, even the weakest ground sources create energy flow to the upper atmosphere and every monochromatic component of the wave has own dissipation altitude. The curves describing GW penetration into the atmosphere under different conditions are calculated. It is shown that height of the GW absorption increases in conditions of headwind and decreases in conditions of tailwind.