Physics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55..783t&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 4-5, p. 783-787, 789-795.
Physics
11
Auroral Zones, E Region, Eiscat Radar System (Europe), F Region, Ionospheric Electron Density, Night Sky, Ionospheric Ion Density, Nocturnal Variations, Winter
Scientific paper
The EISCAT UHF radar data for December 9-17, 1990 were used to study the quiet night-time E-region at high latitudes. Results include information on the electron density in the F-region, on layered structures in the E-region, and on ion densities in thin layers. Observations include the nighttime appearance of steeply descending 'intermediate layers' merging to the lower lying sporadic-E. The intermediate layers differ from the main layers by their rapid downward motion and a repetition period of about an hour, both properties suggesting that the layers are caused by gravity waves.
Huuskonen Asko
Nygrén T.
Turunen Tauno
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