scholarly journals The long-wave potential-vorticity dynamics of coastal fronts

2020 ◽  
Vol 888 ◽  
Author(s):  
S. Jamshidi ◽  
E. R. Johnson
Keyword(s):  
Potential Vorticity ◽  
Wave Potential ◽  
Long Wave ◽  
Vorticity Dynamics ◽  
Image Position

scholarly journals Nonlinear stage in the development of hydrodynamic instability in laser targets

1990 ◽  
Vol 8 (1-2) ◽  
pp. 173-182 ◽  
Author(s):  
E. G. Gamaly ◽  
I. G. Lebo ◽  
V. B. Rozanov ◽  
A. P. Favorsky ◽  
A. O. Fedyanin ◽  
...  
Keyword(s):  
Growth Rate ◽  
Laser Irradiation ◽  
Hydrodynamic Instability ◽  
Short Wave ◽  
Numerical Code ◽  
Linear Stage ◽  
Long Wave ◽  
Nonlinear Stage ◽  
Rayleigh Taylor Instability ◽  
Image Position

The development of a hydrodynamic instability in laser targets is studied by means of a 2-D numerical code “ATLANT”. During the linear stage, the perturbations grow as:In the nonlinear stage the growth rate of the Rayleigh-Taylor instability is reduced, and new harmonics are generated. The effect of the nonuniformity of the laser irradiation has been investigated for long-wave and short-wave perturbations. The growth rate of short-wave perturbations may be effectively decreased by means of symmetrical pre-pulses.

Geostrophic Scatter Diagrams and Potential Vorticity Dynamics

1986 ◽  
Vol 43 (24) ◽  
pp. 3226-3240 ◽  
Author(s):  
P. L. Read ◽  
P. B. Rhines ◽  
A. A. White
Keyword(s):  
Potential Vorticity ◽  
Vorticity Dynamics

scholarly journals Zonal Momentum Balance, Potential Vorticity Dynamics, and Mass Fluxes on Near-Surface Isentropes

2005 ◽  
Vol 62 (6) ◽  
pp. 1884-1900 ◽  
Author(s):  
Tapio Schneider
Keyword(s):  
Potential Vorticity ◽  
Momentum Balance ◽  
Near Surface ◽  
Global Circulation ◽  
Balance Condition ◽  
Mass Fluxes ◽  
Vorticity Dynamics ◽  
The Mean ◽  
Zonal Momentum Balance ◽  
Zonal Momentum

Abstract While it has been recognized for some time that isentropic coordinates provide a convenient framework for theories of the global circulation of the atmosphere, the role of boundary effects in the zonal momentum balance and in potential vorticity dynamics on isentropes that intersect the surface has remained unclear. Here, a balance equation is derived that describes the temporal and zonal mean balance of zonal momentum and of potential vorticity on isentropes, including the near-surface isentropes that sometimes intersect the surface. Integrated vertically, the mean zonal momentum or potential vorticity balance leads to a balance condition that relates the mean meridional mass flux along isentropes to eddy fluxes of potential vorticity and surface potential temperature. The isentropic-coordinate balance condition formally resembles balance conditions well known in quasigeostrophic theory, but on near-surface isentropes it generally differs from the quasigeostrophic balance conditions. Not taking the intersection of isentropes with the surface into account, quasigeostrophic theory does not adequately represent the potential vorticity dynamics and mass fluxes on near-surface isentropes—a shortcoming that calls into question the relevance of quasigeostrophic theories for the macroturbulence and global circulation of the atmosphere.

Mapping potential-vorticity dynamics on Jupiter. I: Zonal-mean circulation from Cassini and Voyager 1 data

2006 ◽  
Vol 132 (618) ◽  
pp. 1577-1603 ◽  
Author(s):  
Peter L. Read ◽  
Peter J. Gierasch ◽  
Barney J. Conrath ◽  
Amy Simon-Miller ◽  
Thierry Fouchet ◽  
...  
Keyword(s):  
Potential Vorticity ◽  
Vorticity Dynamics ◽  
Mean Circulation
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