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Planetary Waves in Horizontal and Vertical Shear: Asymptotic Theory for Equatorial Waves in Weak Shear
Publisher: American Meteorological Society
Abstract: A simple multiple-scale expansion procedure is given for calculating corrections to the structure of equatorial planetary waves in the presence of weak shear and dissipation. For upward-propapting Rossby-gravity (Yanai-Maruyama) ...
Planetary Waves in Horizontal and Vertical Shear: The Generalized Eliassen-Palm Relation and the Mean Zonal Acceleration
Publisher: American Meteorological Society
Abstract: Using a new generalization of the Eliassen-Palm relations, we discuss the zonal-mean-flow tendency ??/?t due to waves in a stratified, rotating atmosphere, with particular attention to equatorially trapped modes. Wave ...
Energy Spectra Predicted by Semi-Geostrophic Theories of Frontogenesis
Publisher: American Meteorological Society
Abstract: During the final stages of the formation of fronts, semi-geostrophic theory predicts kinetic and available potential energy spectra that closely approximate a ?8/3 power law as a function of horizontal wavenumber.
Generalized Eliassen-Palm and Charney-Drazin Theorems for Waves on Axismmetric Mean Flows in Compressible Atmospheres
Publisher: American Meteorological Society
Abstract: The theorems, which exhibit the role of wave dissipation, excitation and transience in the forcing of mean flow changes of second order in wave amplitude by arbitrary, small-amplitude disturbances, are obtained 1) for the ...
Eliassen-Palm Diagnostics of Wave-Mean Flow Interaction in the GFDL "SKYHI" General Circulation Model
Publisher: American Meteorological Society
Abstract: The Eliassen-Palm flux is important in analytical studies of small-amplitude waves where it provides a powerful and elegant tool for the description of wave propagation in mean zonal shear flows, as well as for analysis ...
Dynamical Evolution of the Northern Stratosphere in Early Winter 1991/92, as Observed by the Improved Stratospheric and Mesospheric Sounder
Publisher: American Meteorological Society
Abstract: Dynamical fields based on temperature measurements from the Improved Stratospheric and Mesospheric Sounder on the Upper Atmosphere Research Satellite are presented for the Northern Hemisphere stratosphere for the period ...