A theory for quasi-periodic oscillations observed in the ionosphere

Jones, Walter L.

doi:10.1016/0021-9169(70)90071-1

Cited by 28 publications

(25 citation statements)

References 14 publications

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“…The two waves at 21 km wavelength had much smaller responses at 110 km than at 80 km. Taken together these results suggest that the large response in the temperature perturbation seen near both 80–85 km and around 110 km is probably due to a buoyancy type oscillation that is excited because it is near the triple point, where our simulations and those of Jones [1970] indicate a preferred response. If the wave we observed was closer to the triple point too much energy would be found in the upper altitude near 110 km resulting in an inference of an unrealistically large source.…”

Section: Discussionsupporting

confidence: 58%

“…The shape of the modes strongly resemble the plots shown in Figure 6. Jones [1970] modeled the motions, with periods around 3 minutes, that are often seen in ionosonde data and which have been attributed to thunderstorms. This study showed that the atmosphere is highly resonant in the vicinity of the triple point region discussed earlier.…”

Section: Discussionmentioning

confidence: 99%

“…For more that 30 years ionosondes have reported periodic variations with periods in the 1–20 minute range [see, e.g., Georges , 1968, and references therein; Jones , 1970, and references therein]. Often such variations are seen, with periods near 3 minutes, during times that are associated with thunderstorms.…”

Section: Introductionmentioning

confidence: 99%

“…Often such variations are seen, with periods near 3 minutes, during times that are associated with thunderstorms. Jones [1970] performed steady state calculations of acoustic, gravity and Lamb wave normal modes and concluded that these 3‐minute waves are generated by a coupling between the Lamb wave normal mode and the first acoustic wave normal mode. Thus, acoustic waves generated in the troposphere are believed to be measured by ionosondes from thermospheric altitudes (above 150 km).…”

Section: Introductionmentioning

confidence: 99%

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An observation of a fast external atmospheric acoustic‐gravity wave

et al. 2002

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[1] In November 1999 a new near-IR airglow imaging system was deployed at the Starfire Optical Range outside of Albuquerque, New Mexico. This system allowed wide angle images of the airglow to be collected, with high signal to noise, every 3 seconds with a one second integration time. At approximately 1000 UT on November 17, 1999, a fast wavelike disturbance was seen propagating through the OH Meinel airglow layer. This wave had an observed period of %215 seconds, an observed phase velocity of %160 m/s and a horizontal wavelength of %35 km. This phase velocity is among the fastest yet reported using an imager viewing the OH Meinel bands, while the wave period is among the shortest. Simultaneous Na lidar wind and temperature data from 80 to nearly 110 km altitude allow the intrinsic properties of the wave to be calculated. The Einaudi and Hines [1970] WKB approximation for the acoustic-gravity wave dispersion relation was used to calculate the wave's intrinsic properties. Using this approach indicates that the observed disturbance was an external acoustic wave in the 90 to 107 km altitude region and an external gravity wave at other altitudes between 80 and 90 km. Using model atmospheric data for altitudes below and above this altitude regime indicates that the wave is essentially external everywhere except perhaps in narrow regions around 80 and 105-110 km. This is confirmed using a more exact full-wave model analysis. The observations and model results suggest that this wave was not generated in the troposphere and propagated up to the mesosphere, but rather near 100 km altitude where it was possibly generated by a Leonids meteor.

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Section: Discussionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An observation of a fast external atmospheric acoustic‐gravity wave

et al. 2002

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“…These waves can propagate to great heights with minimal dissipation Jones, 1970;Raju et al, 1981;Rind, 1978]. Internal acoustic waves can reach much greater altitudes than internal gravity waves with the same vertical scale (same scale-dependent dissipation rate).…”

Section: Introductionmentioning

confidence: 99%

Acoustic waves generated by gusty flow over hilly terrain

Walterscheid

2005

J. Geophys. Res.

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[1] We examine the generation of acoustic waves by gusty flow over hilly terrain. We use simple theoretical models of the interaction between terrain and eddies and a linear model of acoustic-gravity wave propagation. The calculations presented here suggest that over a dense array of geographically extensive sources orographically generated vertically propagating acoustic waves can be a significant cause of thermospheric heating. This heating may account in good part for the thermospheric hot spot near the Andes reported by Meriwether et al. (1996Meriwether et al. ( , 1997.Citation: Walterscheid, R. L., and M. P. Hickey (2005), Acoustic waves generated by gusty flow over hilly terrain,

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