Results 251 to 260 of about 8,939,787 (291)

Potential Vorticity Hydraulics

2007
To this point we have dwelt with applications in which the velocity of the current is comparable with the speed of long, internal gravity waves. This situation can arise in channels, along coastlines, in the lee of mountains, or in other special locations, but is less likely to occur in the relatively slow and broad general circulation of the ocean or ...
Larry J. Pratt, John A. Whitehead
openaire   +1 more source

Potential vorticities in semi-geostrophic theory

Quarterly Journal of the Royal Meteorological Society, 1996
AbstractA family of kinematically possible motions in shallow‐water versions of semi‐geostrophic theory is devised, with variable Coriolis parameter, for which two distinct measures of potential vorticity take the same value. Conditions are described for which this value is conserved following the actual motion of a particle. The results are related to
Roulstone, I, Sewell, MJ
openaire   +3 more sources

Sensitivity to potential vorticity

Quarterly Journal of the Royal Meteorological Society, 1998
AbstractA new method is proposed that computes the sensitivity to potential vorticity of any diagnosed aspect of the atmosphere. It does not require the computation of the adjoint of the full inversion procedure, but rather the tangent linear and the adjoint of the operator that relates the wind and mass fields to the distribution of potential ...
openaire   +1 more source

Relativistic potential vorticity

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1984
Abstract Inviscid fluids in classical mechanics preserve the value of the potential vorticity ρ-1∇ x u• ∇s on each fluid element. The conservation law is a local expression of Kelvin’s circulation theorem. These results are generalised to inviscid flows in general relativity.
openaire   +1 more source

Multidimensional Solitons and Vortices in Periodic Potentials

2006
The existence of stable solitons and localized vortices in two- and three-dimensional (2D and 3D) media governed by the cubic nonlinear Schrodinger equation with a periodic potential is demonstrated by means of the variational approximation (VA) and in direct simulations. In the 2D case, multi-mode (hexagonal, triangular, and quasi-periodic) potentials
B. B. BAIZAKOV, SALERNO, Mario, B. A. MALOMED   +2 more
openaire   +1 more source

The omega equation and potential vorticity

Quarterly Journal of the Royal Meteorological Society, 2003
AbstractTwo fundamental perspectives on the dynamics of midlatitude weather systems are provided by potential vorticity (PV) and the omega equation. The aim of this paper is to investigate the link between the two perspectives, which has so far received very little attention in the meteorological literature.
Brian Hoskins, Mike Pedder, David Wyn Jones   +2 more
openaire   +1 more source

Negative potential vorticity lenses

International Journal of Engineering Science, 1992
Abstract The dynamical properties of inviscid fluid lenses, which rotate faster than the local Coriolis, were studied through numerical experiments. Such lenses have negative potential vorticity and generally require nonlinear dynamical balances. A solution scheme was used that preserved exactly the relevant nonlinearity of the Euler equations.
A.D. Kirwan, Bruce Lipphardt, Juping Liu
openaire   +1 more source

Potential Vorticity in Hurricane Gloria

Monthly Weather Review, 1995
Abstract Potential vorticity (PV) analysts for Hurricane Gloria of 1985 are derived from nested objective wind analyses of Omega dropwindsonde and airborne Doppler radar data. The analyses resolve eyewall-scale features in the inner vortex core and embed analyses of these features within the larger-scale environment.
Lloyd J. Shapiro, James L. Franklin
openaire   +1 more source

Potential vorticity and inertia–gravity waves

Geophysical & Astrophysical Fluid Dynamics, 2012
Peer ...
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Potential Vorticity Inversion on a Hemisphere

Journal of the Atmospheric Sciences, 2000
Abstract Several different kinds of accurate potential vorticity (PV) inversion operators, and the associated balanced models, are tested for the shallow water equations on a hemisphere in an attempt to approach the ultimate limitations of the balance, inversion, and slow-manifold concepts.
Michael E. McIntyre, Warwick A. Norton
openaire   +1 more source