Physics
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15.1353r&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 15, Nov. 1988, p. 1353-1356.
Physics
61
Atmospheric Circulation, Gravity Waves, Mesosphere, Radar Echoes, Eiscat Radar System (Europe), Polar Regions, Summer
Scientific paper
The EISCAT 224 MHz radar was operated in a high spectral resolution mode to study polar mesosphere summer echoes. Intermittent and localized scattering regions of less than 1 km thickness were observed. Gravity waves were present, which were occasionally steepened. Turbulent velocity fluctuations were not obviously related to certain phases of the observed short-period gravity waves. It is shown that the large signal amplitudes of these polar mesosphere summer echoes result from backscatter due to electron density variations, which extend to scales shorter than the scales of neutral turbulence.
Hall Chris
Hoppe Ulf-Peter
Kelley Michael C.
La Hoz Cesar
Roettger Juergen
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