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Observations and Numerical Simulations of Inertia-Gravity Waves and Shearing Instabilities in the Vicinity of a Jet Stream
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ABSTRACT
The characteristics and dynamics of inertia-gravity waves generated in the vicinity of an intense jet stream/ upper-level frontal system on 18 February 2001 are investigated using observations from the NOAA Gulfstream-IV research aircraft and numerical simulations. Aircraft dropsonde observations and numerical simulations elucidate the detailed mesoscale structure of this system, including its associated inertia-gravity waves and clear-air turbulence. Results from a multiply n...
Related newspaper, magazine, and journal articles from HighBeam Research
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Observations and Numerical Simulations of Inertia-Gravity Waves and Shearing Instabilities in the Vicinity of a Jet Stream
Journal of the Atmospheric Sciences
; ABSTRACT The characteristics and dynamics of inertia-gravity waves generated in the vicinity of an intense jet stream/ upper-level frontal system on 18 February 2001 are investigated using observations from the NOAA Gulfstream-IV research aircraft and numerical simulations. Aircraft dropsonde
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Gravity waves appearing in a high-resolution GCM simulation
Journal of the Atmospheric Sciences
; ABSTRACT Global characteristics of gravity waves in the lower stratosphere are examined using a GCM with high resolution in both the horizontal (T106, corresponding to about 120 km) and the vertical (-600 m). The bottom boundary condition of the model is that of an aquaplanet with perpetual
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On the Forcing of Inertia-Gravity Waves by Synoptic-Scale Flows
Journal of the Atmospheric Sciences
; ABSTRACT Studies on the spontaneous emission of gravity waves from jets, both observational and numerical, have emphasized that excitation of gravity waves occurred preferentially near regions of imbalance. Yet a quantitative relation between the several large-scale diagnostics of imbalance and the
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Inertia-Gravity Waves Spontaneously Generated by Jets and Fronts. Part I: Different Baroclinic Life Cycles
Journal of the Atmospheric Sciences
; ... purpose of the present section is to highlight a characteristic that all the wave packets identified above share. In horizontal maps at successive times, their phase lines clearly remain attached to a feature of the baroclinic wave. In other words, their phase ...
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Exponentially Small Inertia-Gravity Waves and the Breakdown of Quasigeostrophic Balance
Journal of the Atmospheric Sciences
; ABSTRACT The spontaneous generation of inertia-gravity waves by balanced motion is investigated in the limit of small Rossby number [epsilon] [much less than] 1. Particular (sheared disturbance) solutions of the three-dimensional Boussinesq equations are considered. For these solutions, there is a
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Inertia-Gravity Waves Generated within a Dipole Vortex
Journal of the Atmospheric Sciences
; ABSTRACT Vortex dipoles provide a simple representation of localized atmospheric jets. Numerical simulations of a synoptic-scale dipole in surface potential temperature are considered in a rotating, stratified fluid with approximately uniform potential vorticity. Following an initial period of
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Convectively generated gravity waves and their effect on the cloud environment
Journal of the Atmospheric Sciences
; ABSTRACT This study uses a two-dimensional cloud-resolving model to examine how convectively generated gravity waves modify the environment of an isolated convective cloud. The model is initialized with an idealized sounding, and the cloud is initiated by adding a locally buoyant perturbation. The
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A satellite triangle for gravity waves. (proposal to use three artificial satellites for experiments on gravity waves in space)
Science News
; A satellite triangle for gravity waves Gravity waves are the one major prediction of Einstein's generalrelativity theory that has not been directly detected or demonstrated by experimental equipment. These waves-- gravity's analog to radio--are cyclic disturbances of gravitational forces generated
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Generation of Mesoscale Gravity Waves in Upper-Tropospheric Jet-Front Systems
Journal of the Atmospheric Sciences
; ... 272-288. Hoskins, B. J., M. E. Mclntyre, and A. W. Robertson, 1985: On the use and significance of isentropic potential vorticity maps. Quart. J. Roy. Meteor. Sac., Ill, 877-946. Kaplan, M. L., and D. A. Paine, 1977: The observed divergence of the horizontal velocity ...
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Vertically propagating gravity waves
Bulletin of the American Meteorological Society
; Vertically propagating internal gravity waves play a major role in dynamically linking the lower and middle atmospheres. Among various gravity wave sources, cumulus convection has received much attention as a possible source of nonstationary gravity waves, especially in the Tropics. However,
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