Physics
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jatp...49..339h&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 49, April 1987, p. 339-351.
Physics
1
Atmospheric Circulation, Atmospheric Models, Gravity Waves, Middle Atmosphere, Wave Propagation, Climatology, Orography, Wind Shear, Winter
Scientific paper
An analysis of the internal gravity waves (IGWs) produced in a general circulation model of the middle atmosphere for nondiurnal January conditions is presented, illustrating the intermittancy and variability of these waves. IGWs were most readily detected by the vertical velocities, with the meridional velocity exhibiting the next clearest response to IGW, although only above 60 km. In the troposphere, vertical velocities were dominated by very high temporal frequencies which varied with height, with periods of 2-6 h predominating in the lower thermosphere. Predicted vertical fluxes of energy and momentum were much less than those observed, indicating the need to parameterize these terms in the present model.
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