Article (Scientific journals)
The morphology of equatorial Mg/plus/ ion distribution deduced from 2800-A airglow observations
Gérard, Jean-Claude; Rusch, D. W.; Hays, P. B. et al.
1979In Journal of Geophysical Research, 84, p. 5249-5258
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Keywords :
AIRGLOW; EQUATORIAL ATMOSPHERE; IONOSPHERIC ION DENSITY; MAGNESIUM; METAL IONS; DIURNAL VARIATIONS; EMISSION SPECTRA; EXPLORER 17 SATELLITE; F REGION; RESONANCE SCATTERING; ULTRAVIOLET SPECTROSCOPY; VERTICAL DISTRIBUTION
Abstract :
[en] The Visible Airglow Experiment on the Atmosphere Explorer E satellite has observed the resonantly scattered emission from Mg II at 2800 A in the equatorial ionosphere. Altitude profiles of the Mg(plus) ion distribution have been obtained from the inversion of the surface brightness measurements made on spinning orbits. These data show a daytime metallic ion layer between 150 and 200 km developing in the early morning and reaching about 100 ions/cu cm in the afternoon. Mg(plus) ions are also seen in the F 2 region mostly in the late afternoon hours within a few degrees of the dip equator. The study of the vertical column density measured in the despun mode indicates that the amount of Mg(plus) in the F region is most variable in the afternoon hours at low dip latitudes. These results can be explained in part by the diurnal variation of the E x B drift velocity which lifts the metallic ions up into the F region. The observations suggest that the vertical polarization electric field is not the primary transport mechanism extracting the Mg(plus) ions from the low-altitude source layer.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Rusch, D. W.;  Colorado, University, Boulder, Colo.
Hays, P. B.;  Michigan, University, Ann Arbor, Mich.
Fesen, C. L.;  Michigan, University, Ann Arbor, Mich.
Language :
English
Title :
The morphology of equatorial Mg/plus/ ion distribution deduced from 2800-A airglow observations
Publication date :
01 September 1979
Journal title :
Journal of Geophysical Research
ISSN :
0148-0227
eISSN :
2156-2202
Publisher :
American Geophysical Union (AGU), Washington DC, United States
Volume :
84
Pages :
5249-5258
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
A&AA ID. AAA026.083.016
Available on ORBi :
since 30 October 2009

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