Rolls of the internal gravity waves in the Earth's  atmosphere

Onishchenko, O. G.; Pokhotelov, O. A.; Horton, W.; Smolyakov, A. I.; Kaladze, T. D.; Fedun, V.

doi:10.5194/angeo-32-181-2014

Cited by 12 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Richardson number is a key parameter for measuring the stability of the atmosphere. When R i < 0.25, dynamical instability occurs (Onishchenko et al, 2014).…”

Section: Experimental Analysis and Discussionmentioning

confidence: 99%

Inertia gravity wave activity in the troposphere and lower stratosphere observed by Wuhan MST radar

Qing

Zhou

Zhao

et al. 2016

Sci. China Earth Sci.

View full text Add to dashboard Cite

The troposphere and lower stratosphere (TLS) is a region with active atmospheric fluctuations. The Wuhan Mesosphere-Stratosphere-Troposphere (MST) radar is the first MST radar to have become operational in Mainland China. It is dedicated to real-time atmospheric observations. In this paper, two case studies about inertia gravity waves (IGWs) derived from three-dimensional wind field data collected with the Wuhan MST radar are presented. The intrinsic frequencies, vertical wavelengths, horizontal wavelengths, vertical wavenumber spectra, and energy density are calculated and analyzed. In this paper, we also report on multiple waves existing in the lower stratosphere observed by the Wuhan MST radar. Lomb-Scargle spectral analysis and the hodograph method were used to derive the vertical wavenumber and propagation direction. Meanwhile, an identical IGW is observed by Wuhan MST radar both in troposphere and lower stratosphere regions. Combining the observations, the source of the latter IGW detected in the TLS would be the jet streams located in the tropopause region, which also produced wind shear above and below the tropopause.

show abstract

“…The Richardson number is a key parameter for measuring the stability of the atmosphere. When R i < 0.25, dynamical instability occurs (Onishchenko et al, 2014).…”

Section: Experimental Analysis and Discussionmentioning

confidence: 99%

Inertia gravity wave activity in the troposphere and lower stratosphere observed by Wuhan MST radar

Qing

Zhou

Zhao

et al. 2016

Sci. China Earth Sci.

View full text Add to dashboard Cite

show abstract

“…The exponential growth of the vertical vorticity from the nonlinear interactions between the poloidal and toroidal velocities in the nonlinear dynamics is derived following the analysis of Onishchenko et al [].…”

Section: Dust Devil Generation From Temperature Gradientsmentioning

confidence: 99%

Dust devil dynamics

et al. 2016

Self Cite

View full text Add to dashboard Cite

A self‐consistent hydrodynamic model for the solar heating‐driven onset of a dust devil vortex is derived and analyzed. The toroidal flows and vertical velocity fields are driven by an instability that arises from the inversion of the mass density stratification produced by solar heating of the sandy surface soil. The nonlinear dynamics in the primary temperature gradient‐driven vertical airflows drives a secondary toroidal vortex flow through a parametric interaction in the nonlinear structures. While an external tangential shear flow may initiate energy transfer to the toroidal vortex flow, the nonlinear interactions dominate the transfer of vertical‐radial flows into a fast toroidal flow. This secondary flow has a vertical vorticity, while the primary thermal gradient‐driven flow produces the toroidal vorticity. Simulations for the complex nonlinear structure are carried out with the passive convection of sand as test particles. Triboelectric charging modeling of the dust is used to estimate the charging of the sand particles. Parameters for a Dust Devil laboratory experiment are proposed considering various working gases and dust particle parameters. The nonlinear dynamics of the toroidal flow driven by the temperature gradient is of generic interest for both neutral gases and plasmas.

show abstract

“…Such parametric generation of large scale zonal structures by high-frequency finite-amplitude IG waves has been investigated recently by Horton et al [26] and Onishchenko et al [27]. The effects of the wind shear on the roll structures of nonlinear IG waves in the Earth's dynamically unstable atmosphere with the finite vertical temperature gradients were investigated by Onishchenko et al [28].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear evolution of internal gravity waves in the Earth's ionosphere: Analytical and numerical approach

Kaladze,

Misra,

Roy

et al. 2021

Preprint

View full text Add to dashboard Cite

The nonlinear propagation of internal gravity waves in the weakly ionized, incompressible Earth's ionosphere is studied using the fluid theory approach. Previous theory in the literature is advanced by the effects of the terrestrial inhomogeneous magnetic field embedded in weakly ionized ionospheric layers ranging in altitude from about 50 to 500 km. It is shown that the ionospheric conducting fluids can support the formation of solitary dipolar vortices (or modons). Both analytical and numerical solutions of the latter are obtained and analyzed. It is found that in absence of the Pedersen conductivity, different vortex structures with different space localization can be formed which can move with the supersonic velocity without any energy loss. However, its presence can cause the amplitude of the solitary vortices to decay with time and the vortex structure can completely disappear owing to the energy loss. Such energy loss can be delayed, i.e., the vortex structure can prevail for relatively a longer time if the nonlinear effects associated with either the stream function or the density variation become significantly higher than the dissipation due to the Pedersen conductivity. The main characteristic dynamic parameters are also defined which are in good correlation with the existing experimental data.

show abstract

Rolls of the internal gravity waves in the Earth's atmosphere

Cited by 12 publications

References 15 publications

Inertia gravity wave activity in the troposphere and lower stratosphere observed by Wuhan MST radar

Inertia gravity wave activity in the troposphere and lower stratosphere observed by Wuhan MST radar

Dust devil dynamics

Nonlinear evolution of internal gravity waves in the Earth's ionosphere: Analytical and numerical approach

Contact Info

Product

Resources

About