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RISOn the Global Exchange of Mass between the Stratosphere and Troposphere
Publisher: American Meteorological Society
Abstract: Seasonal mean downward mass fluxes across the 100 mb level in the extratropics of both hemispheres are computed using the meridionally integrated residual vertical circulation as determined from the transformed Eulerian ...
A Further Study of Gravity Wave Induced Drag and Diffusion in the Mesosphere
Publisher: American Meteorological Society
Abstract: Lindzen's parameterization for the drag and eddy diffusion produced by breaking internal gravity waves in the mesosphere and lower thermosphere is applied to a modified version of the ?-plane channel model of Holton in ...
Transport Circulation Deduced from SAMS Trace Species Data
Publisher: American Meteorological Society
Abstract: Three years of zonally averaged N2O and CH4 data from the SAMS instrument on Nimbus 7 are utilized to investigate the annual and semiannual cycles in long-lived tracer mixing ratios. The annual and semiannual variations ...
Numerical Simulations of Convectively Generated Stratospheric Gravity Waves
Publisher: American Meteorological Society
Abstract: The excitation and vertical propagation of gravity waves is simulated in a two-dimensional model of a mesoscale convective storm. It is shown that in a simulated squall line the gravity waves that are preferentially excited ...
A Model Study of Zonal Forcing in the Equatorial Stratosphere by Convectively Induced Gravity Waves
Publisher: American Meteorological Society
Abstract: A two-dimensional cloud-resolving model is used to examine the possible role of gravity waves generated by a simulated tropical squall line in forcing the quasi-biennial oscillation (QBO) of the zonal winds in the equatorial ...
The Role of Forced Planetary Waves in the Annual Cycle of the Zonal Mean Circulation of the Middle Atmosphere
Publisher: American Meteorological Society
Abstract: The annual cycle of the zonally averaged circulation in the middle atmosphere (16?96 km) is simulated using; a severely truncated semi-spectral numerical model. The model includes only a single zonal harmonic wave component ...
The Gravity Wave Response above Deep Convection in a Squall Line Simulation
Publisher: American Meteorological Society
Abstract: High-frequency gravity waves generated by convective storms likely play an important role in the general circulation of the middle atmosphere. Yet little is known about waves from this source. This work utilizes a fully ...
A Numerical Study of Three-Dimensional Gravity Waves Triggered by Deep Tropical Convection and Their Role in the Dynamics of the QBO
Publisher: American Meteorological Society
Abstract: A 3D mesoscale model is used to study the structure of convectively triggered gravity waves in the Tropics and their role in the dynamics of the middle atmosphere. Simulations with three stratospheric background zonal wind ...
On the Vertical Scale of Gravity Waves Excited by Localized Thermal Forcing
Publisher: American Meteorological Society
Abstract: Gravity waves generated by convective heating are widely believed to have vertical wavelengths approximately twice the depth of the heating. The frequency, horizontal, and vertical wavelengths of gravity waves are, however, ...