Computer Science – Sound
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.4639m&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, May 1, 1987, p. 4639-4648. Research supported by the Danish Space Boa
Computer Science
Sound
19
Atmospheric Circulation, Auroras, E Region, F Region, Thermosphere, Wind Measurement, Coriolis Effect, Electron Density (Concentration), Mesosphere, Rocket Sounding, Wave Propagation
Scientific paper
In the present three-dimensional wind field observations in the dusk auroral oval, the F region winds appear to be at the transition from a clockwise vortex centered at dusk to an antisunward flow at the nightside of the polar cap, while the E region winds seem to be part of a gravity wave with a wind amplitude of 125 m/sec. The wave period is found to be close to three hours, on the basis of the ratio of the magnitude of the wind component normal to the direction of wave propagation to the magnitude parallel to the direction of propagation. The observations show that significant energy resides in the divergent motions that are part of the transient response in the E region, at least in this case.
Friis-Christensen Eigil
Kelley Michael C.
Larsen Mark F.
Mikkelsen Ib Steen
Vickrey J.
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