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Thermospheric Dissipation Of Upward Propagating Gravity Wave Packets, C. J. Heale, J. B. Snively, M. P. Hickey, C. J. Ali
Thermospheric Dissipation Of Upward Propagating Gravity Wave Packets, C. J. Heale, J. B. Snively, M. P. Hickey, C. J. Ali
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We use a nonlinear, fully compressible, two-dimensional numerical model to study the effects of dissipation on gravity wave packet spectra in the thermosphere. Numerical simulations are performed to excite gravity wave packets using either a time-dependent vertical body forcing at the bottom boundary or a specified initial wave perturbation. Three simulation case studies are performed to excite (1) a steady state monochromatic wave, (2) a spectrally broad wave packet, and (3) a quasi-monochromatic wave packet. In addition, we analyze (4) an initial condition simulation with an isothermal background. We find that, in cases where the wave is not continually forced, …