acoustic gravity wave
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2021 ◽  
Vol 37 (4) ◽  
pp. 163-171
Author(s):  
O. K. Cheremnykh ◽  
A. K. Fedorenko ◽  
D. I. Vlasov ◽  
S. V. Melnychuk

2021 ◽  
Vol 37 (4) ◽  
pp. 3-17
Author(s):  
O.K. Cheremnykh ◽  
A.K. Fedorenko ◽  
D.I. Vlasov ◽  
S.V. Melnychuk

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 765
Author(s):  
Esfhan A. Kherani ◽  
Saul A. Sanchez ◽  
Eurico R. de Paula

Numerous recent studies report the Coseismic Tropospheric Disturbances (CTDs) during large earthquakes. Their presence suggests the importance of atmospheric seismology in a possible earthquake forecasting scenario. The origin mechanism and associated energetics of CTDs are not well understood though the observations associate them with the atmospheric waves. We present the numerical modeling of coupled dynamics of Gravity waves (GWs) and convective instability (CI) in the dry troposphere that produces the CTDs, in the form of pressure disturbances, of observed magnitudes. The study reveals the altitude and epicentral distribution of CTDs and elaborates the relative role of GWs and CI in the generation and intensification of CTDs. The study finds that mega and strong earthquakes disturb the troposphere to a similar level as the severe meteorological weather.


Fluids ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 91 ◽  
Author(s):  
Usama Kadri

Time reversal of free-surface water (gravity) waves due to a sudden change in the effective gravity has been extensively studied in recent years. Here, we show that an analogy to time-reversal can be obtained using nonlinear acoustic-gravity wave theory. More specifically, we present a mathematical model for the evolution of a time-reversed gravity wave packet from a nonlinear resonant triad perspective. We show that the sudden appearance of an acoustic mode in analogy to a sudden vertical oscillation of the liquid film, can resonate effectively with the original gravity wave packet causing energy pumping into an oppositely propagating (time-reversed) surface gravity wave of an almost identical shape.


2018 ◽  
Vol 22 ◽  
pp. 01032
Author(s):  
Tolga Akturk ◽  
Tukur Abdulkadir Sulaiman ◽  
Haci Mehmet Baskonus ◽  
Hasan Bulut

In this article, we utilize the powerful sine-Gordon expansion method (SGEM) in constructing some new solutions to the (2 + 1)-dimensional Boiti-Leon-Pempinelli equation by using the Mathematica software. We successfully obtain some new travelling solutions bearing some new structures such as trigonometric function, exponential function and hyperbolic function structures. We claim that some of our results are complex in structure. All the solutions obtained verified the the (2 + 1)-dimensional Boiti-Leon-Pempinelli equation. To illustrate our results, present the numerical simulation of all the obtained solutions in this study by selecting appropriate values of the parameters. Furthermore, we give the physical interpretation of all the graphics. We also give the physical meaning to some of the obtained results in this study.


2016 ◽  
Vol 10 (1) ◽  
pp. 127-132 ◽  
Author(s):  
I. V. Karpov ◽  
S. P. Kshevetsky ◽  
O. P. Borchevkina ◽  
A. V. Radievsky ◽  
A. I. Karpov

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