Generation mechanisms of convectively forced internal gravity waves and their propagation to the stratosphere

From: Journal of the Atmospheric Sciences | Date: August 15, 2003| Author: Song, In-Sun; Chun, Hye-Yeong; Lane, Todd P | Copyright information

ABSTRACT

Characteristics of gravity waves induced by mesoscale convective storms and the gravity wave sources are investigated using a two-dimensional cloud-resolving numerical model. In a nonlinear moist (control) simulation, the convective system reaches a quasi-steady state after 4 h in which convective cells are periodically regenerated from a gust front updraft. In the convective storms, there are two types of wave forcing: nonlinear forcing in the form of the divergences of momen...

Related newspaper, magazine, and journal articles from HighBeam Research

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
Tracking Gravity Waves in Baroclinic Jet-Front Systems
Journal of the Atmospheric Sciences ; ABSTRACT Using a two-dimensional Fourier decomposition and a four-dimensional ray-tracing technique, the propagating characteristics and source mechanisms of mesoscale gravity waves simulated in idealized baroclinic jet-front systems are investigated. The Fourier decomposition successfully
Momentum Flux Spectrum of Convectively Forced Gravity Waves: Can Diabatic Forcing Be a Proxy for Convective Forcing?
Journal of the Atmospheric Sciences ; (ProQuest Information and Learning: denotes formulae omitted.) ABSTRACT The momentum flux of convectively forced internal gravity waves is calculated using explicitly resolved model-simulated gravity wave data. The momentum flux in a control simulation with nonlinearity and cloud microphysical
Secondary generation of gravity waves associated with the breaking of mountain waves
Journal of the Atmospheric Sciences ; ABSTRACT The generation of small-scale gravity waves associated with the breaking of mountain waves in the stratosphere has been simulated within a fully compressible, nonhydrostatic, two-dimensional numerical model. The model includes the mesosphere and offers sufficiently high spatial resolution
Latitudinal variations observed in gravity waves with short vertical wavelengths
Journal of the Atmospheric Sciences ; (Manuscript received IS October 2000, in final form 17 August 2001) ABSTRACT Knowledge of the latitudinal variations in the occurrence of gravity waves is important for their parameterization in global models. Observations of gravity waves with short vertical scales have shown a pronounced peak in