Evanescent acoustic-gravity waves in a rotating stratified atmosphere

Cheremnykh, O. K.; Kaladze, T. D.; Selivanov, Yuriy; Cheremnykh, S. O.

doi:10.1016/j.asr.2021.10.050

Cited by 15 publications

(23 citation statements)

References 25 publications

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“…It should be noted that the results of [40] are qualitative in nature, as they are obtained for values Ω that differ from the real ones. We focus on values Ω close to the actual frequency of rotation of the Earth's atmosphere.…”

Section: Introductionmentioning

confidence: 90%

“…We consider wave disturbances with wavelength much less than the Earth's radius. Therefore, we neglect the curvature of the Earth's atmosphere and, following [40,43], we study the propagation of acoustic-gravity waves on the plane tangent to a spherical gas layer at some point A. We introduce a Cartesian coordinate system (x, y, z) on this plane so that the axis z is directed outward from the plane, so that − → g = −g − → e z , the axis x is directed eastward, and the axis y -northward.…”

Section: Initial Equationsmentioning

confidence: 99%

“…A recent paper [40] considered the effect of the Earth's atmosphere on the spectrum of acousticgravity waves. The results of this work can be conveniently explained using the diagnostic diagram presented in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…This will allow us to study the behavior of these waves in the equatorial and mid-latitude regions. The study will be conducted within the model used in [40,43].…”

Section: Introductionmentioning

confidence: 99%

“…We restrict the consideration to free acoustic and gravity waves, because (see Fig. 1) the limiting frequencies of these waves coincide with the limiting frequencies of evanescent waves (see more in [40]). Therefore, in the diagnostic diagram, the limiting frequencies of free acoustic and gravity waves also determine the boundaries of the regions of evanescent waves.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the Earth's atmosphere rotation on the spectrum of acoustic-gravity waves

Cheremnykh,

Vlasov

2022

Preprint

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It was shown in a recent paper by Cheremnykh et al. (Advances in Space Research, 2022) that taking into account the rotation of the Earth's atmosphere leads to the appearance of a new region of evanescent waves with a continuous frequency spectrum on the diagnostic diagram of acoustic-gravity waves. The region is located below the lower limit of gravity waves, which is equal 2Ω at all wavelengths, where Ω is the angular frequency of the atmosphere rotation. This result was obtained for high-latitude regions of the atmosphere, in which we can limit ourselves to considering only the vertical component of the Earth's rotation frequency. In the proposed paper we show that taking into account both components of the vector of the atmosphere rotation frequency − → Ω -horizontal, Ω cos ϕ , and vertical, Ω sin ϕ, where ϕ is the Earth's latitude, the dominant role in the acoustic-gravity waves propagation is played by the vertical component. It is shown that the horizontal component leads to an insignificant modification on the diagnostic diagram of the boundaries of the areas of acoustic and gravity waves, which can be neglected. Also shown that the strongest vertical component of the frequency affects the lower limit of gravity waves, which depends at all wavelengths on the latitude of the observation site and is equal to 2Ω sin ϕ.

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Section: Introductionmentioning

confidence: 90%

Section: Initial Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…This will allow us to study the behavior of these waves in the equatorial and mid-latitude regions. The study will be conducted within the model used in [40,43].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations