搜索结果: 1-11 共查到“地球物理学 Kinetic”相关记录11条 . 查询时间(0.148 秒)
Ion thermal effects on E-region instabilities: 2D kinetic simulations
E-region electrojet Ionospheric irregularities Plasma instabilities
2017/3/22
Radars frequently receive strong returns from naturally occurring plasma density irregularities centered around
100 km altitude in the atmosphere. These E-region ionospheric irregularities occur when...
On the spectral distribution of kinetic energy in large-scale atmospheric flow
spectral distribution kinetic energy large-scale atmospheric flow
2009/11/13
A one-dimensional form of the equation of motion with forcing and dissipation is formulated in the spectral domain and used to make long term integrations from which the spectral distribution of the k...
Closure of multi-fluid and kinetic equations for cyclotron-resonant interactions of solar wind ions with Alfvén waves
multi-fluid kinetic equations cyclotron-resonant interactions solar wind ions Alfvén waves
2009/11/13
Based on quasilinear theory, a closure scheme for anisotropic multi-component fluid equations is developed for the wave-particle interactions of ions with electromagnetic Alfvén and ion-cyclotron wave...
Dissipation and wave-ion interaction in the solar wind:Links between fluid and kinetic theory
wave-ion interaction solar wind Links between fluid and kinetic theory
2009/11/13
In this paper we establish links between turbulence dissipation and wave-particle interactions in the solar corona and wind. Based on quasilinear theory, a set of anisotropic, multi-component fluid eq...
A basing of the diffusion approximation derivation for the four-wave kinetic integral and properties of the approximation
diffusion approximation derivation four-wave kinetic integral
2009/11/12
A basing of the diffusion approximation derivation for the Hasselmann kinetic integral describing nonlinear interactions of gravity waves in deep water is discussed. It is shown that the diffusion app...
Evolution of magnetic helicity under kinetic magnetic reconnection:Part II B≠0 reconnection
magnetic helicity kinetic magnetic reconnection B≠0 reconnection
2009/11/12
We investigate the evolution of magnetic helicity under kinetic magnetic reconnection in thin current sheets. We use Harris sheet equilibria and superimpose an external magnetic guide field. Consequen...
Low-frequency linear waves and instabilities in uniform and stratified plasmas:the role of kinetic effects
Low-frequency linear waves uniform and stratified plasmas kinetic effects
2009/11/11
We review the basic approximations underlying magnetohydrodynamic (MHD) theory, with special emphasis on the closure approximations, i.e. the approximations used in any fluid approach to close the hie...
Recent progress in nonlinear kinetic Alfvén waves
Recent progress nonlinear kinetic Alfvén waves
2009/11/11
This paper presents a review of recent progress in nonlinear kinetic Alfvén wave (KAW hereafter). We start with the two-fluid theory of KAWs and show how the difference between the motions of electron...
Excitation of kinetic Alfvén turbulence by MHD waves and energization of space plasmas
kinetic Alfvén turbulence MHD waves energization of space plasmas
2009/11/11
There is abundant observational evidence that the energization of plasma particles in space is correlated with an enhanced activity of large-scale MHD waves. Since these waves cannot interact with par...
One-dimensional hybrid code simulations are presented, carried out in order both to study solitary waves of the slow mode branch in an isotropic, collisionless, medium-β plasma (βi=0.25) and to test t...
Currents flowing in the Earth’s ionospheric electrojets
often develop Farley-Buneman (FB) streaming instabilities
and become turbulent. The resulting electron density
irregularities cause these reg...