Images of transequatorial <i>F</i> region bubbles in 630‐ and 777‐nm emissions compared with satellite measurements

Tinsley, Brian A.; Rohrbaugh, R. P.; Hanson, W. B.; Broadfoot, A. L.

doi:10.1029/95ja01398

Cited by 59 publications

(48 citation statements)

References 16 publications

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“…Recent airglow imaging using highly sensitive cooledcharge coupled device (CCD) cameras has shown detailed structures and dynamics of the plasma bubbles through airglow emissions at wavelengths of 630.0 and 777.4 nm, which have emission layers at the bottom of the F layer and near the F-layer peak, respectively (e.g., Mendillo and *Correspondence: shiokawa@stelab.nagoya-u.ac.jp 1 Solar-Terrestrial Environment Laboratory, Nagoya University, Furo-cho, Chikusa-ku, 464-8601 Nagoya, Japan Full list of author information is available at the end of the article Baumgardner, 1982;Rohrbaugh et al 1989;Tinsley et al 1997;Aarons et al 1999;Sahai et al 2000;Makela and Kelley, 2003). Makela et al (2006) showed the development of a secondary instability at the eastern wall of the plasma bubbles by using an airglow imager in Hawaii.…”

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confidence: 99%

Airglow-imaging observation of plasma bubble disappearance at geomagnetically conjugate points

Shiokawa

Otsuka

Lynn³

et al. 2015

Earth Planet Sp

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We report the first observation of the disappearance of a plasma bubble over geomagnetically conjugate points. It was observed by airglow imagers at Darwin, Australia (magnetic latitude: −22°N) and Sata, Japan (21°N) on 8 August 2002. The plasma bubble was observed in 630-nm airglow images from 1530 (0030 LT) to 1800 UT (0300 LT) and disappeared equatorward at 1800 to 1900 UT (0300 to 0400 LT) in the field of view. The ionograms at Darwin and Yamagawa (20 km north of Sata) show strong spread-F signatures at approximately 16 to 21 UT. At Darwin, the F-layer virtual height suddenly increased from approximately 200 to approximately 260 km at the time of bubble disappearance. However, a similar F-layer height increase was not observed over the conjugate point at Yamagawa, indicating that this F-layer rise was caused not by an eastward electric field but by enhancement of the equatorward thermospheric wind over Darwin. We think that this enhancement of the equatorward neutral wind was caused by an equatorward-propagating large-scale traveling ionospheric disturbance, which was identified in the north-south keogram of 630-nm airglow images. We speculate that polarization electric field associated with this equatorward neutral wind drive plasma drift across the magnetic field line to cause the observed bubble disappearance.

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Section: Introductionmentioning

confidence: 99%

Airglow-imaging observation of plasma bubble disappearance at geomagnetically conjugate points

Shiokawa

Otsuka

Lynn³

et al. 2015

Earth Planet Sp

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“…Several investigators have used wideangle imaging of the F-region emissions to study the onset, evolution and dynamics of plasma bubbles (e.g. Weber et al, 1980;Mendillo and Baumgardner, 1982;Rohrbaugh et al, 1989;Sahai et al, 1994;Tinsley et al, 1997;Taylor et al, 1997;Mukherjee et al, 1998;Fagundes et al, 1999;Sinha et al, 2001;Abalde et al, 2001). …”

Section: Introductionmentioning

confidence: 99%

Generation of large-scale equatorial F-region plasma depletions during lowrange spread-F season

Sahai

Fagundes²,

Abalde³

et al. 2004

Ann. Geophys.

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“…Airglow imaging technique, on the other hand, is a powerful tool to detect spatial and temporal evolution of the bubble structures from ground and satellite (e.g. Mendillo and Baumgardner, 1982;Rohrbaugh et al, 1989;Tinsley et al, 1997;Aarons et al, 1999;Sahai et al, 2000;Makela and Kelley, 2003;Sagawa et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Time evolution of high-altitude plasma bubbles imaged at geomagnetic conjugate points

et al. 2004

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Abstract. Temporal and spatial evolution of two highaltitude plasma bubbles (evening and midnight) was observed on 4 April 2002, at geomagnetic conjugate points at Sata, Japan (magnetic latitude 24 • N), and Darwin, Australia (magnetic latitude 22 • S), using two 630-nm airglow imagers. The apex height of the bubbles reached ∼1500 km. The upward velocity of the evolution was faster in the evening (∼170 m/s at 20:00-21:00 LT) than around midnight (∼28 m/s at 23:00-00:00 LT). Bifurcating features of the bubbles into a smaller scale size of ∼50 km were clearly seen for both the evening and midnight bubbles, showing fairly good conjugacy between the Northern and Southern Hemispheres.

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Images of transequatorial F region bubbles in 630‐ and 777‐nm emissions compared with satellite measurements

Cited by 59 publications

References 16 publications

Airglow-imaging observation of plasma bubble disappearance at geomagnetically conjugate points

Airglow-imaging observation of plasma bubble disappearance at geomagnetically conjugate points

Generation of large-scale equatorial F-region plasma depletions during lowrange spread-F season

Time evolution of high-altitude plasma bubbles imaged at geomagnetic conjugate points

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