A linear analysis on the acceleration of zonal flow by baroclinic instability. I - Terrestrial atmosphere. II Jovian atmosphere

Details A linear analysis on the acceleration of zonal flow by baroclinic instability. I - Terrestrial atmosphere. II Jovian atmosphere A linear analysis on the acceleration of zonal flow by baroclinic instability. I - Terrestrial atmosphere. II Jovian atmosphere

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jats...40.2323s&link_type=abstract

Journal of the Atmospheric Sciences (ISSN 0022-4928), vol. 40, Oct. 1983, p. 2323-2348.

Computer Science

2

Atmospheric Circulation, Baroclinic Instability, Energy Budgets, Jet Streams (Meteorology), Planetary Waves, Wind Velocity, Zonal Flow (Meteorology), Atmospheric Models, Atmospheric Temperature, Atmospheric Turbulence, Geostrophic Wind, Jupiter Atmosphere, Meridional Flow, Midlatitude Atmosphere, Standing Waves

Scientific paper

A linear stability wave-zonal flow interaction analysis is used to investigate a mechanism which accelerates the midlatitude zonal-mean wind. In the first of the two model types analyzed, the basic state consists of an unstable zonal-mean state and a transient planetary wave with a finite amplitude. In the second, the basic state is prescribed by a statistically stationary wave that is embedded in an unstable zonal-mean state. The stability of these basic states is computed numerically for the terrestrial atmosphere, using a two-layer quasi-geostrophic model in spherical coordinates. The basic state with the transient planetary wave generates a zonal-mean perturbation having monotonic exponential growth, while that with a stationary wave generates a zonal-mean perturbation with oscillatory exponential growth. These results compare favorably with observed energy conversion characteristics from the eddy kinetic to the zonal-mean kinetic energies.

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