Computer Science – Sound
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1421l&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 39, Oct. 1991, p. 1421-1434. Research supported by SERC, Royal Society of Lon
Computer Science
Sound
8
F Region, Gravity Waves, Sporadic E Layer, Tides, Diurnal Variations, Eiscat Radar System (Europe), Ionospheric Electron Density, Solar Terrestrial Interactions, Solar Wind, Wind (Meteorology)
Scientific paper
During three days of quiet geomagnetic conditions in August 1988, both the Eiscat UHE radar and the NOAA digital ionospheric sounder (Dynasonde) were operated from 12:00 to 22:00 U.T. Sporadic-E layers were observed on all three days, controlled by the action of the semidiurnal tide. Gravity-wave activity was very evident in both data sets, and particularly visible in the changes in intensity and position of the layers. By combining the two sets of measurements it is possible to build up a spatial picture of the phase fronts passing over Tromso, with sporadic-E layers acting as tracers for them in the E-region. It is observed that structures in the electron density associated with gravity waves descend from the F-region through the E-region to merge with the increases in the layer intensity. The enhancements in the layers are ribbon-like and aligned along the gravity wave phase fronts in the E-W direction, traveling southward at 60 km/h and about 50 km apart.
Huuskonen Asko
Jarvis Martin J.
Lanchester B. S.
Nygrén T.
Turunen Tauno
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