Results 241 to 250 of about 56,536 (266)

The effects of acoustic-gravity waves on the K i 7699 line

Solar Physics, 1986
We examine the effects of acoustic-gravity waves with long and short periods on the solar profile of the K i7699 line using a dynamic model of line formation.
SEVERINO G, ROBERTI G, MARMOLINO, Ciro, GOMEZ M. T.   +3 more
openaire   +2 more sources

Acoustic-gravity waves in a nonadiabatic atmosphere

Izvestiya, Atmospheric and Oceanic Physics, 2007
The effect of a real departure of the atmosphere from the adiabaticity condition on the generation and dissipation of acoustic-gravity waves (AGWs) throughout the entire height of the atmosphere up to the mesopause (≈90 km) is studied. The results of solving the derived dispersion equation can be helpful in the formation of boundary conditions during ...
openaire   +1 more source

Energy balance of evanescent acoustic-gravity waves

Kinematika i fizika nebesnyh tel (Online), 2022
A. K. Fedorenko, O. K. Cheremnykh, E. I. Kryuchkov, D. I. Vlasov   +3 more
openaire   +1 more source

Observed features of acoustic gravity waves in the heterosphere

Geomagnetism and Aeronomy, 2014
According to measurements on the Dynamic Explorer 2 satellite, features of the propagation of acoustic gravity waves (AGWs) in the multicomponent upper atmosphere have been investigated. In the altitude range 250–400 km in wave concentration variations of some atmospheric gases, amplitude and phase differences have been observed.
A. K. Fedorenko, E. I. Kryuchkov
openaire   +1 more source

Diffraction of acoustic-gravity waves in the presence of a turning point

The Journal of the Acoustical Society of America, 2016
Acoustic-gravity waves (AGWs) in an inhomogeneous atmosphere often have caustics, where the ray theory predicts unphysical, divergent values of the wave amplitude and needs to be modified. Unlike acoustic waves and gravity waves in incompressible fluids, AGW fields in the vicinity of a caustic have never been systematically studied.
openaire   +3 more sources

Ducted Acoustic Gravity Waves in a Nearly Isothermal Atmosphere

The Journal of the Acoustical Society of America, 1967
The propagation of acoustic gravity waves is analyzed in atmospheres that have vertical profiles of sound speed squared of the form c2(z) = c2(∞)±Δc2e−2/l, where c2(∞)≫Δc2>0, and both c2(∞) and Δc2 are constant. Ducted wave dispersion relations are obtained from the requirements that the earth's surface act as a rigid boundary to the atmospheric
openaire   +1 more source

Acoustic-Gravity Waves from Bolide Sources

Earth, Moon, and Planets, 2007
We have developed a new approach to modeling the acoustic-gravity wave (AGW) radiation from bolide sources. This first effort involves entry modeling of bolide sources that have available satellite data through procedures developed in ReVelle (Earth Moon Planets 95, 441–476, 2004a; in: A. Milani, G. Valsecchi, D.
openaire   +1 more source

Solutions of the inhomogeneous acoustic-gravity wave equation

Journal of Physics A: Mathematical and General, 1977
The response of a stratified compressible fluid (an 'atmosphere') to an oscillatory point source has in the past been discussed in an astrophysical context, with a view to increasing understanding of the complex problem of wave generation by turbulence.
openaire   +1 more source

Evanescent acoustic-gravity waves in a rotating stratified atmosphere

Advances in Space Research, 2022
O K Cheremnykh, Yuriy A Selivanov
exaly  

Coupled Generation of Acoustic and Gravity Waves by Tropospheric Heat Sources

Russian Journal of Physical Chemistry B, 2023
S P Kshevetskii, N M Gavrilov, Kshevetskii S P   +2 more
exaly