Gravity wave initiation of equatorial spread F: A case study

Kelley, M. C.; Larsen, M. F.; LaHoz, C.; McClure, J. P.

doi:10.1029/ja086ia11p09087

Cited by 346 publications

(313 citation statements)

References 36 publications

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“…Such appears to have been the case on one of the nights at Jicamarca used in this comparison, with the actual plume eruptions correlated with secondary rises in the F-layer. The similar spacings of the plumes supports theories of initiation mechanisms tied to gravity waves [Kelley et al, 1981], though other factors certainly play roles in these mechanisms. While one night exhibited strong plume activity at both sites, the other night described here had only plumes over Brazil.…”

Section: Discussionsupporting

confidence: 60%

Same night observations of spread‐F by the Jicamarca Radio Observatory in Peru and CUPRI in Alcântara, Brazil

Swartz

Woodman

1998

Geophysical Research Letters

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Abstract.50-MHz echoes from equatorial spread-F were observed on several nights by both the Jica- The next two nights which produced plumes over Brazil, but only bottomside layers over Peru, emphasize that local conditions on the same night can be very different at the two locations. The importance of having a sufficiently wide beam for exploring spread-F over a large altitude range at the Alcantara site is also explored.

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Section: Discussionsupporting

confidence: 60%

Same night observations of spread‐F by the Jicamarca Radio Observatory in Peru and CUPRI in Alcântara, Brazil

Swartz

Woodman

1998

Geophysical Research Letters

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“…It is not feasible for large-scale disturbances to develop without the help of seeding [Kelley, 2009]. Gravity waves can trigger a R-T instability, both by providing an initial perturbation and by affecting the stability condition, as postulated in Röttger [1973], Klostermeyer [1978], and Kelley et al [1981]. Nicolls and Kelley [2005] presented evidence of gravity wave seeding of ionospheric plasma instabilities.…”

Section: Introductionmentioning

confidence: 99%

Large‐scale structures in the equatorial ionosphere and their connection to the generalized Rayleigh‐Taylor instability

et al. 2013

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[1] For the first time, electric field and density fluctuations have been simultaneously measured on the Communications/Navigation Outage Forecasting System satellite at large scales (>300 km). The ratio of their spectral power rises as k 2 , unlike scales from 20 m to 300 km where the ratio is independent of k. We suggest that gravity waves dominate these large scales and mix with density gradients via self-generated electric fields to form dn/n 0 .Citation: Dao, E., M. C. Kelley, R. F. Pfaff, and P. A. Roddy (2013), Large-scale structures in the equatorial ionosphere and their connection to the generalized Rayleigh-Taylor instability,

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“…What we are describing here (except for some geometrical differences) is the neutral wind driven component of the generalized Rayleigh-Taylor instability [e.g., Kelley et al, 1981] …”

Section: Implications For Spread-f Generationmentioning

confidence: 99%

Postsunset vortex in equatorial F‐region plasma drifts and implications for bottomside spread‐F

Kudeki¹,

1999

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Abstract. Recent high-resolution incoherent scatter drift measurements conducted at Jicamarca during solar minimum conditions indicate that a vortical plasma flow pattern accompanies the well known prereversal enhancement events observed in the equatorial F region. The vortex is centered at •250 km altitude and about 2000-3000 km east of the evening terminator and is characterized by upward and downward flows to the west and to the east and eastward and westward flows on the top and the bottom, respectively. Postsunset bottomside spread-F events are observed to commence in the interior of the vortex in regions of westward plasma drifts. The formation of the vortex implies localized charging of the postsunset bottomside F region in response to eastward neutral wind driven F region dynamo action. IntroductionThe purpose of this paper is to report incoherent scatter radar observations of avortical flow pattern in equatorial F region plasma drifts that has been detect-

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Gravity wave initiation of equatorial spread F: A case study

Cited by 346 publications

References 36 publications

Same night observations of spread‐F by the Jicamarca Radio Observatory in Peru and CUPRI in Alcântara, Brazil

Same night observations of spread‐F by the Jicamarca Radio Observatory in Peru and CUPRI in Alcântara, Brazil

Large‐scale structures in the equatorial ionosphere and their connection to the generalized Rayleigh‐Taylor instability

Postsunset vortex in equatorial F‐region plasma drifts and implications for bottomside spread‐F

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