Physics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31.1465g&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 31, Dec. 1983, p. 1465-1478. Sponsorship: Deutsche Forschungsgemeinschaft.
Physics
8
Atmospheric Circulation, Atmospheric Models, Dynamic Models, Gravity Waves, Middle Atmosphere, Solstices, Euler Equations Of Motion, Mesosphere, Northern Hemisphere, Thermosphere, Wave Interaction, Winter
Scientific paper
Using a set of transformed Eulerian equations the zonal-averaged circulation of the middle atmosphere (10-110 km) is calculated on a global scale for solstice conditions. The emphasis lies on an improved modelling of the zonal momentum balance of the mesosphere and lower thermosphere. For this purpose an internal gravity wave mean flow interaction model suggested by T. Matsuno has been incorporated in a slightly modified version. With this model the observed reversal of the zonal wind with height in the summer upper mesosphere and lower thermosphere can be reproduced. The coefficient of eddy momentum diffusion and the Rayleigh friction coefficient used in this model have been made temperature dependent by describing them as a function of the local static stability parameter.
Blum Peter W.
Gaertner V.
Memmesheimer M.
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