Journal ArticleDOI
A note on “kelvin” waves in the atmosphere1
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In this article, a special solution of the linearized equations for an equatorial β-plane is described, and it is shown that the solution is a vertically propagating gravity wave in the x-z plane which is in geostrophic balance in the meridional plane.Abstract:
A special solution of the linearized equations for an equatorial β-plane is described. The meridional velocity is set identically zero and it is shown that the solution is a vertically propagating gravity wave in the x-z plane which is in geostrophic balance in the meridional plane. These waves are shown to be similar to Kelvin waves in a bounded ocean. Some implications of the atmospheric “Kelvin” waves for equatorial dynamics are discussed.read more
Citations
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Journal ArticleDOI
General circulation of the tropical lower stratosphere
TL;DR: In the tropical lower stratosphere, the zonally symmetric flow exhibits three types of variability: (1) an annual cycle that has odd symmetry about the equator with easterlies in the summer hemisphere and westerlies in winter hemisphere, (2) a semiannual oscillation with a rather complex distribution of amplitude and phase, and (3) irregular long-period fluctuations with an average period of somewhat >2 years and even symmetry about equator, successive easterly and wind regimes of this so-called quasi-biennial oscillation being observed to
Journal ArticleDOI
A Theory of Large-Scale Equatorial Waves Generated by Condensation Heat and Accelerating
TL;DR: In this paper, a three-dimensional linearized primitive equation model of unstable waves is constructed on an equatorial beta plane for the purpose of extending the theoretical interpretation of the large-scale equatorial waves discovered by Yanai and Maruyama (1966).
Journal ArticleDOI
Wave coupling between the lower and upper atmosphere: case study of an ultra-fast Kelvin Wave
TL;DR: In this article, the effects of mean winds and dissipation on the vertical propagation of high-phase-speed planetary-scale waves from troposphere and stratosphere sources into the mesosphere and thermosphere are reviewed.
Book ChapterDOI
Principles of Large Scale Numerical Weather Prediction
TL;DR: In this paper, the authors admit to a simplified atmospheric model and show that the practical analysis of large-scale atmospheric motions at the present state of hydrodynamical theory forces approximations upon dynamical meteorologists which have a much greater effect on the accuracy of the results than do the somewhat esoteric examples mentioned above.
Journal ArticleDOI
Annual, Interannual, and Intraseasonal Variability of Tropical Tropopause Transition Layer Cirrus
Katrina S. Virts,John M. Wallace +1 more
TL;DR: In this article, the authors used the first three years of data from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) mission to investigate the relationship between cirrus within the tropical tropopause transition layer and the Madden-Julian oscillation (MJO), the annual cycle, and El Nino-Southern Oscillation (ENSO).
References
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Journal ArticleDOI
Quasi-geostrophic motions in the equatorial area
TL;DR: In this article, a single layer of homogeneous incompressible fluid with free surface is treated, where the Coriolis parameter is assumed to be proportional to the latitude, and a strong east-west current was formed along the equator.
Journal ArticleDOI
Propagation of planetary‐scale disturbances from the lower into the upper atmosphere
J. G. Charney,P. G. Drazin +1 more
TL;DR: In this paper, the authors investigated the possibility that a significant part of the energy of the planetary-wave disturbances of the troposphere may propagate into the upper atmosphere and found that the effective index of refraction for the planetary waves depends primarily on the distribution of the mean zonal wind with height.
Journal ArticleDOI
Observational Evidence of Kelvin Waves in the Tropical Stratosphere
John M. Wallace,V. E. Kousky +1 more
TL;DR: In this article, a study of synoptic-scale wave motions in the equatorial stratosphere is based on the analysis of six months of radiosonde data from three tropical stations.
Journal ArticleDOI
Planetary waves on beta-planes
TL;DR: In this paper, the problem of linearized oscillations of the gaseous envelope of a rotating sphere (with periods in excess of a day) is considered using the β-plane approximation.
Journal ArticleDOI
A tentative model of the 26-month oscillation in tropical latitudes
TL;DR: In this paper, a model of the three-dimensional wind and temperature fields in the 26-month oscillation is presented, based on empirical data concerning the temperature behaviour and its relationship to the zonal wind behaviour and in part on theoretical deductions from the thermodynamic energy and continuity equations.
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