Physics
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.6803b&link_type=abstract
Journal of Geophysical Research, vol. 85, Dec. 1, 1980, p. 6803-6810.
Physics
3
Atmospheric Circulation, Gravity Waves, Internal Waves, Turbopause, Airglow, Diffusion Coefficient, Emission Spectra, Vortices, Winter
Scientific paper
A study of the properties of internal gravity waves by means of observations of the 557.7-nm emission line has been carried out. Special emphasis was put on the determination of the kinetic energy density of the waves, which have maxima in winter and in summer, and on the determination of the enhanced diffusion tensor K. Values of the zz component of K, important in theoretical models, of the order of 3,000,000 sq cm/sec were obtained, and its seasonal variation exhibits a winter maximum. The enhanced diffusion due to internal gravity waves is highly anisotropic, being the two eigenvalues corresponding to the horizontal degeneration plane of the order of 4 x 10 to the 9th sq cm/sec. The possible relation between K and D-region winter anomalous absorption has been also examined.
Battaner Eduardo
Molina Alberto
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