Physics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....8810145l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Dec. 1, 1983, p. 10145-10162. Research supported by the Natural Scien
Physics
20
Atmospheric Radiation, Ionospheric Drift, Optical Emission Spectroscopy, Particle Precipitation, Daytime, Light (Visible Radiation), Neutral Gases, Polar Caps, Spatial Distribution, Visible Spectrum, Wind Velocity
Scientific paper
The emissions, at 4278 A, 5200 A, 5577 A, and 6300 A were obtained from a rocket launch through the postnoon dayside cleft into the polar cap ionosphere. The emissions at 4278 A and 5577 A exhibit a clearly defined decrease in intensity at the poleward edge of the dayside particle precipitation, whereas the 5200-A emission extends well into the polar cap with only a slight decrease in intensity. The behavior of the 6300-A emission is intermediate between these extremes. A dynamical model of dayside cleft auroral processes incorporating transport by ion and neutral winds is used to analyze the optical data. It is concluded that neutral winds are responsible for modifying the spatial distribution of the 5200-A and 6300-A emission and that the ion drift component is negligible.
Link Robert
McConnell John C.
Shepherd Gordon G.
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