 |
| Titel |
Equatorial spread F fossil plumes |
| VerfasserIn |
J. Krall, J. D. Huba, S. L. Ossakow, G. Joyce |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 11 ; Nr. 28, no. 11 (2010-11-09), S.2059-2069 |
| Datensatznummer |
250016910
|
| Publikation (Nr.) |
 copernicus.org/angeo-28-2059-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| Behaviour of equatorial spread F (ESF) fossil plumes, i.e.,
ESF plumes that have stopped rising,
is examined using the NRL SAMI3/ESF three-dimensional simulation code.
We find that fossil bubbles, plasma density
depletions associated with fossil plumes,
can persist as high-altitude equatorial depletions even while being
"blown" by zonal winds.
Corresponding airglow-proxy images of fossil plumes,
plots of electron density versus longitude and latitude
at a constant altitude of 288 km,
are shown to partially "fill in" in most cases, beginning with the highest
altitude field lines within the plume.
Specifically, field lines upon which the E field has fallen
entirely to zero are affected and only the low altitude (≤600 km)
portion if each field line fills in.
This suggests that it should be possible to
observe a bubble at high altitude on a field line
for which the corresponding airglow image no longer shows a depletion.
In all cases ESF plumes stop rising
when the flux-tube-integrated ion mass density inside the upper edge of the
bubble is equal to that of the nearby background, further supporting
the result of Krall
et al. (2010b). |
| |
|
| Teil von |
|
|
|
|
|
|
|
|