2009
DOI: 10.5194/angeo-27-1477-2009
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Simultaneous observation of ionospheric plasma bubbles and mesospheric gravity waves during the SpreadFEx Campaign

Abstract: Abstract. During the Spread F Experiment campaign, under NASA Living with a Star (LWS) program, carried out in the South American Magnetic Equator region from 22 September to 8 November 2005, two airglow CCD imagers, located at Cariri (7.4 • S, 36.5 • W, geomag. 11 • S) and near Brasilia (14.8 • S, 47.6 • W, geomag. 10 • S) were operated simultaneously and measured the equatorial ionospheric bubbles and their time evolution by monitoring the airglow OI 6300 intensity depletions. Simultaneous observation of the… Show more

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Cited by 130 publications
(151 citation statements)
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“…However, GW penetration still depends on propitious atmospheric conditions, that is, the absence of filtering of GWs by tidal or larger scale winds and absence of turning levels between mesosphere and ionospheric F-layer. Takahashi et al (2009) have successfully investigated some cases of strong correlation between GWs motion in the mesosphere followed by plasma bubble appearing above in the F-region at Cariri. Because we had access to the same database as Takahashi et al (2009), it was possible to estimate the momentum flux and wave amplitudes at the same time intervals of those waves cited in their report.…”
Section: Discussionmentioning
confidence: 99%
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“…However, GW penetration still depends on propitious atmospheric conditions, that is, the absence of filtering of GWs by tidal or larger scale winds and absence of turning levels between mesosphere and ionospheric F-layer. Takahashi et al (2009) have successfully investigated some cases of strong correlation between GWs motion in the mesosphere followed by plasma bubble appearing above in the F-region at Cariri. Because we had access to the same database as Takahashi et al (2009), it was possible to estimate the momentum flux and wave amplitudes at the same time intervals of those waves cited in their report.…”
Section: Discussionmentioning
confidence: 99%
“…Takahashi et al (2009) have successfully investigated some cases of strong correlation between GWs motion in the mesosphere followed by plasma bubble appearing above in the F-region at Cariri. Because we had access to the same database as Takahashi et al (2009), it was possible to estimate the momentum flux and wave amplitudes at the same time intervals of those waves cited in their report. For that comparison we used wind information, once it was available in Cariri during the campaign.…”
Section: Discussionmentioning
confidence: 99%
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“…Note that, with few exceptions (the Atlantic and the two Pacific sectors), the projection of the magnetic equator onto Earth (yellow line and left vertical axis) crosses land in most of the sectors. Thus, the above selection of longitude sectors is interesting, since topography has been listed (Friits and Alexander, 2003;Takahashi et al, 2009;Carrasco and Batista, 2012) as one of the possible drivers of gravity waves. These waves propagate vertically, reaching the bottom of the F layer to seed plasma instability processes that generate equatorial plasma bubbles and irregularities in the ionospheric density.…”
Section: Data Description and Processingmentioning
confidence: 99%