Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa21b..05v&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA21B-05
Physics
[2435] Ionosphere / Ionospheric Disturbances, [2487] Ionosphere / Wave Propagation, [3367] Atmospheric Processes / Theoretical Modeling, [3369] Atmospheric Processes / Thermospheric Dynamics
Scientific paper
In this talk, we discuss the excitation, propagation and dissipation of secondary gravity waves (GWs) excited by mountain wave breaking. We show that many of these secondary GWs can propagate to z=200-250 km prior to dissipating in the thermosphere. We apply our results to GWs observed during the daytime at Poker Flat, Alaska, by PFISR. We find that the wave amplitudes are approximately proportional to the wind speeds over the mountains NW of PFISR. We also find that the horizontal phase speeds, periods, and horizontal wavelengths of the observed waves agree well with GW dissipative theory applied to the secondary GW spectrum.
Nicolls Michael J.
Vadas Sharon L.
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