Computer Science – Sound
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jatp...46..775l&link_type=abstract
(IAMAP, IAGA, and IUGG, Symposium on Middle Atmosphere Science, Hamburg, West Germany, Aug. 15, 16, 1983) Journal of Atmospheric
Computer Science
Sound
16
D Region, Ionospheric Sounding, Middle Atmosphere, Radio Probing, Annual Variations, Atmospheric Pressure, Low Frequencies, Pressure Effects, Winter
Scientific paper
The indirect phase height analysis of continuous ground-based records of l.f. and v.l.f. radio waves reflected in the D-region (70-90 km) is described. From these observations a parameter can be derived which is shown to characterize the ionized state at upper mesosphere heights for each day, being controlled during most of the year predominantly by neutral atmosphere pressure variations. In winter, this pressure control is reinforced by the additional influence of other factors connected with the well-known winter anomaly of radio wave absorption. Application of phase height analysis to a number of individual winters demonstrates its ability to trace stratosphere-mesosphere coupling processes during midwinter disturbances in the middle atmosphere.
Lauter E.-A.
Taubenheim J.
von Cossart Götz
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