Results 221 to 230 of about 7,328 (267)

Planetary waves on the Sun?

Solar Physics, 1971
Some recent observations of the Sun suggest a class of wave-like motions moving both eastward and westward at a uniform velocity with respect to the mean solar angular velocity. It is suggested that these may be hydromagnetic planetary waves. An estimate of the mean toroidal magnetic field is made, based on a theoretical treatment of such waves already
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Planetary waves in rotating ionosphere

Plasma Physics Reports, 2008
The problem of propagation of ultralong planetary waves in the Earth’s upper atmosphere is considered. A new exact solution to the MHD equations for the ionosphere is obtained in spherical coordinates with allowance for the geomagnetic field and Earth’s rotation.
A. G. Khantadze, V. G. Jandieri, G. V. Jandieri   +2 more
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Planetary solitary waves

2007
This chapter describes solitary waves in the atmosphere and ocean with diameters from perhaps a hundred kilometers to scales larger than the earth: vortices embedded in a shear zone, Rossby solitons and equatorial Kelvin solitary waves among others. One theme is that while nonlinear coherent structures are readily identified in both observations and ...
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Quasi‐geostrophic planetary wave forcing

Quarterly Journal of the Royal Meteorological Society, 1978
AbstractThe problem of stationary planetary wave forcing by orography and longitudinal asymmetry of heating is re‐examined in the light of recent observations and theories of stratospheric motion. It is deduced that the region between 30 and 60km is a sink of planetary wave energy for zonal wavenumbers one and two in winter and that, in contrast to ...
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On the seasonal cycle of stratospheric planetary waves

pure and applied geophysics, 1989
Quasi-stationary planetary waves exhibit different seasonal behaviour in the two winter stratospheres. Whereas, in a climatological sense, wave amplitudes are large throughout northern winter, in the Southern Hemisphere there is a climatological minimum in midwinter.
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The stability of planetary waves on a sphere

Journal of Fluid Mechanics, 1976
The stability of individual inviscid barotropic planetary waves and zonal flow on a sphere to small disturbances is examined by means of numerical solution of the algebraic eigenvalue problem arising from the spectral form of the governing equations. It is shown that waves with total wavenumber n (the lower index of the Legendre function P m
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Eddies Masquerade as Planetary Waves

Science, 2011
Variabilities in sea-level and upper-ocean chlorophyll reveal the systematic influence of nonlinear eddies.
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ULF waves in planetary magnetospheres

2006
Ultra-low frequency (ULF) waves are messengers in space plasmas. They communicate information about unstable, free-energy-containing plasma configurations, transient phenomena, or obstacles in flowing plasmas; they transport energy between different parts of magnetospheric systems; and they serve as momentum coupling agents between remote regions such ...
Karl-Heinz Glassmeier, Jared Espley
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Asymptotic method for planetary waves

The Physics of Fluids, 1975
An asymptotic method based upon the ray theory is extended to the study of planetary waves in a fluid of variable depth over the rotating earth. An asymptotic solution involving a phase function and an amplitude function is constructed. Application of the method to the study of wave resonance of a compressible fluid in a rotating spherical shell is ...
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Planetary waves in a polar ocean

2011
The dynamics of the Arctic ocean are studied on a polar projection of the sphere. The density structure is idealized as a two-layer system, and a general formulation is developed which allows inclusion of latitudinal and longitudinal depth variations as well as asymmetries in the boundaries of the ocean.
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