The Dynamics of Baroclinic Zonal Jets*
نویسندگان
چکیده
منابع مشابه
Formation of Jets by Baroclinic Turbulence
Turbulent fluids are frequently observed to spontaneously self-organize into large spatial-scale jets; geophysical examples of this phenomenon include the Jovian banded winds and the earth’s polar-front jet. These relatively steady large-scale jets arise from and are maintained by the smaller spatialand temporalscale turbulence with which they coexist. Frequently these jets are found to be adju...
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The general circulation and the behavior of multiple jets and baroclinic eddies are described for an atmosphere in which meridional potential temperature gradients and eddies are confined to a weather layer. The weather layer is separated from the frictional lower boundary by a statically stable barotropic layer with significant mass. Closure of the zonal momentum budget in the resulting circul...
متن کاملThe structure of zonal jets in geostrophic turbulence By RICHARD
The structure of zonal jets arising in forced-dissipative, two-dimensional turbulent flow on the β-plane is investigated using high-resolution, long-time numerical integrations, with particular emphasis on the late-time distribution of potential vorticity. The structure of the jets is found to depend in a simple way on a single non-dimensional parameter, which may be conveniently expressed as t...
متن کاملSlow Evolution of Zonal Jets on the Beta Plane
The authors study the stability of a barotropic sinusoidal meridional flow on a b plane. Because of bottom drag and lateral viscosity, the system is dissipative and forcing maintains a basic-state velocity that carries fluid across the planetary vorticity contours; this is a simple model of forced potential vorticity mixing. When the Reynolds number is slightly above the stability threshold, a ...
متن کاملMaintenance of Multiple Jets in a Baroclinic Flow
This article describes the generation and maintenance of persistent zonal jets in a two-layer quasigeostrophic, b-plane channel model, focusing on the transition from a one to a two jet state. For weak and moderate values of surface friction and supercriticality, the transition occurs abruptly as the width of the baroclinically unstable region of the initial flow is gradually increased. Across ...
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ژورنال
عنوان ژورنال: Journal of the Atmospheric Sciences
سال: 2015
ISSN: 0022-4928,1520-0469
DOI: 10.1175/jas-d-14-0027.1