Planetary scale wave response to auroral heating of the neutral atmosphere

Physics – Space Physics

Scientific paper

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Auroras, Thermosphere, Coriolis Effect, Gravitational Waves, Green'S Functions, Heating, Wave Equations

Scientific paper

Observations of auroral forms by meteorological satellites, of detailed thermospheric density response to auroral heating and of wind fields at thermospheric altitudes indicate that both phenomena exhibit structures whose spatial scales are in the synoptic-planetary range. In order to study the propagation of these planetary scale disturbances, proper account of the wave vorticity transport must be taken. The author has formulated and solved the approximate Green's function response problem of atmospheric waves in a spherically rotating atmosphere valid for the full wave spectrum which ranges continuously from acoustic-gravity to Rossby waves. Numerical examples of wave response to an impulsive auroral band are given for a set of planetary surface modes.

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