書誌事項
- 公開日
- 2010-11-09
- 権利情報
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- https://creativecommons.org/licenses/by/3.0/
- DOI
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- 10.5194/angeo-28-2059-2010
- 公開者
- Copernicus GmbH
説明
<jats:p>Abstract. 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). </jats:p>
収録刊行物
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- Annales Geophysicae
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Annales Geophysicae 28 (11), 2059-2069, 2010-11-09
Copernicus GmbH
