We examine the generation of acoustic waves by gusty flow over hilly terrain. We use simple theoretical models of the interaction between terrain and eddies and a linear model of acoustic-gravity wave propagation. The calculations presented here suggest that over a dense array of geographically extensive sources orographically generated vertically propagating acoustic waves can be a significant cause of thermospheric heating. This heating may account in good part for the thermospheric hot spot near the Andes reported by Meriwether et al. (1996, 1997).
Journal of Geophysical Research: Space Physics
American Geophysical Union
Grant or Award Name
NASA NAG5-13025, NAG5-10251, NAG5-13025 and NSF ATM-0242896
Scholarly Commons Citation
Walterscheid, R. L., and M. P. Hickey (2005), Acoustic waves generated by gusty flow over hilly terrain, J. Geophys. Res., 110, A10307, doi:10.1029/2005JA011166.