2003
DOI: 10.1029/2002ja009462
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Latitude dependence of zonal plasma drifts obtained from dual‐site airglow observations

Abstract: All‐sky imagers located at Tucumán, Argentina (26.9°S, 65°W, 14.2°S dip latitude), and Arequipa, Perú (16.5°S, 71.5°W, 2.7°S dip latitude), are used to track 630 nm airglow depletion motions in the first use of multisite airglow imagers for studies of low‐latitude plasma dynamics. A new image analysis technique yields a consistent determination of nighttime zonal plasma drifts from all‐sky images of the depletion motions. The observed eastward plasma drifts are smaller at Arequipa than at Tucumán in the postsu… Show more

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Cited by 106 publications
(168 citation statements)
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“…This latitudinal shear effect was noted earlier by Aggson et al (1987), using in-situ plasma drift observations by the polarorbiting DE-2 satellite. Recent studies confirm and help to explain this observation (Martinis et al, 2003), as F-region drifts have a stronger initial effect on plasma flux tubes that terminate in the anomalies than on plasma in flux tubes that terminate closer to the equator (with lower apex altitudes).…”
Section: Introductionmentioning
confidence: 66%
“…This latitudinal shear effect was noted earlier by Aggson et al (1987), using in-situ plasma drift observations by the polarorbiting DE-2 satellite. Recent studies confirm and help to explain this observation (Martinis et al, 2003), as F-region drifts have a stronger initial effect on plasma flux tubes that terminate in the anomalies than on plasma in flux tubes that terminate closer to the equator (with lower apex altitudes).…”
Section: Introductionmentioning
confidence: 66%
“…The irregularities are generated at the magnetic equator when suitable conditions exist at the F-region bottom-side in the post-sunset period, and manifest themselves as dark bands of intensity depletions in the airglow images taken from equatorial and low-latitude stations (Weber et al, 1978;Mendillo et al, 2005). The depletions are aligned along magnetic field lines, and usually drift eastward with the ambient plasma velocity (Mendillo and Baumgardner, 1982;Sinha et al, 2001;Martinis et al, 2003;Pimenta et al, 2003).…”
Section: Introductionmentioning
confidence: 99%
“…At Ascension Island in the Atlantic Ocean (Mendillo and Baumgardner, 1982), at Natal, Brazil (Mendillo et al, 1985), at Cachoeira Paulista, Brazil (Sahai et al, 1998), at Kwajalein in the Pacific (Mendillo et al, 1992), at Arequipa, Peru, (Mendillo et al, 1997a) and in Tucumán, Argentina (Martinis et al, 2003), ASC were used to study the signatures of the ESF instability. In such cases, it was the reduction of 630.0 nm emission (airglow depletions) that captured the ESF's spatial characteristics.…”
Section: Introductionmentioning
confidence: 99%