Physics
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12...17e&link_type=abstract
(The earth's middle and upper atmosphere; Proceedings of the Topical Meeting of the Interdisciplinary Scientific Commission C /M
Physics
Lower Atmosphere, Mesosphere, Planetary Waves, Thermosphere, Wave Propagation, Gravity Waves, Mesopause, Power Spectra, Summer
Scientific paper
Observational and modeling studies reveal that an appreciable fraction of mesospheric and lower thermospheric variability in space and time can be attributed to planetary waves. Measurements indicate that this is also true for summer conditions when vertically propagating stationary and traveling planetary waves experience strong attenuation in the lower part of the middle atmosphere. Possible causes including in situ generation of normal modes are discussed. The methods of spherical 2d turbulence analysis are used to investigate temporal and vertical changes of large-scale variability employing satellite radiance data. A relative increase of the variance related to intermediate-scale transient structures is found at high altitudes. This seems to reflect the special propagation conditions for traveling planetary waves at heights around the mesopause.
Ebel Adolf
Hass H.
Jakobs H. J.
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