Results 31 to 40 of about 8,939,787 (291)

Vorticity and Potential Vorticity in Mountain Wakes

Journal of the Atmospheric Sciences, 1999
A wake is traditionally defined as the region of nearly stagnant flow downstream of a body in a uniform stream. In a stratified fluid, the motions and density surfaces downstream of an obstacle become primarily horizontal; the vertical component of the vorticity associated with the wake, coexisting with the stable vertical density stratification ...
Rotunno, Richard, Grubisic, Vanda, Smolarkiewicz, Piotr K.   +2 more
openaire   +2 more sources

A balanced approach to modelling rotating stably stratified geophysical flows [PDF]

, 2003
This work was the first to show how one can rewrite the equations for a rotating stratified fluid in a way which makes potential vorticity conservation explicit.
Dritschel, David Gerard, Viúdez, Alvaro, Dritschel, David Gerard; id_orcid   +2 more
core   +1 more source

The structure of zonal jets in geostrophic turbulence [PDF]

, 2012
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 ...
Scott, Richard Kirkness, Dritschel, David Gerard, Dritschel, David Gerard; id_orcid, Scott, Richard Kirkness; id_orcid   +3 more
core   +1 more source

The persistence of balance in geophysical flows [PDF]

, 2007
This paper introduces a novel, powerful way to understand the why geophysical flows are largely under the control of a single scalar field, the potential vorticity, a materially conserved dynamical tracer in the absence of viscous and diabatic effects ...
Viudez, A, Dritschel, David Gerard, Dritschel, David Gerard; id_orcid   +2 more
core   +1 more source

The Kähler potential of Abelian Higgs vortices [PDF]

Journal of Mathematical Physics, 2005
We calculate the Kähler potential for the Samols metric on the moduli space of Abelian Higgs vortices on R2, in two different ways. The first uses a scaling argument. The second depends on a variant of the relationship between accessory parameters and the regularized action in Liouville field theory. The Kähler potential on the moduli space of vortices
Chen, Heng-Yu, Manton, N. S.
openaire   +3 more sources

Large-scale potential vorticity anomalies and deep convection [PDF]

, 2012
This is the accepted version of the following article: Russell, A., Vaughan, G. and Norton, E. G. (2012), Large-scale potential vorticity anomalies and deep convection. Q.J.R. Meteorol. Soc., 138: 1627–1639, which has been published in final form at http:
G. Vaughan, Norton, E. G., Russell, A, A. Russell, Norton, EG, Vaughan, G.; id_orcid, Vaughan, G, Russell, A., E. G. Norton   +8 more
core   +1 more source

Effect of Prandtl's ration on balance in geophysical turbulence [PDF]

, 2015
Support for this research has come from the UK Engineering and Physical Sciences Research Council (grant no. EP/H001794/1).The fluid dynamics of the atmosphere and oceans are to a large extent controlled by the slow evolution of a scalar field called ...
McKiver, William Joseph, Dritschel, David Gerard, Dritschel, David Gerard; id_orcid   +2 more
core   +1 more source

Potential Vorticity of Flow along the Alps [PDF]

Journal of the Atmospheric Sciences, 1993
Abstract Observations from the German Front Experiment are presented here that show the existence—in conditions with a dominant flow component parallel to the main Alpine chain—of a mesoscale region to the north of the Alps where the absolute and potential vorticity (PV) are substantially negative. These structures exist before the front arrives to the
Thorpe, Alan .J., Volkert, Hans, Heimann, Dietrich   +2 more
openaire   +2 more sources

Potential Vorticity Dynamics of Tropical Instability Vortices

Journal of Physical Oceanography, 2014
Abstract Tropical instability vortices (TIVs) in the equatorial Pacific exhibit energetic horizontal and vertical circulation characterized by regions of high Rossby number and low Richardson number. Their strong anticyclonic vorticity and vertical shear can influence the broader-scale circulation by driving lateral mixing and vertical ...
Leif N. Thomas, Ryan M. Holmes, LuAnne Thompson, David Darr   +3 more
openaire   +1 more source

Predictability and dynamics of potential vorticity streamers and connections to high impact weather [PDF]

, 2012
Narrow potential vorticity (PV) intrusions across the tropopause (PV streamers) are interconnected with surface high- and low- pressure systems and frequently present during high-impact weather in the mid-latitudes. They often form during the breaking of
Twitchett, Arwen Fay
core   +5 more sources