Results 71 to 80 of about 10,485 (275)
Tracers and Potential Vorticities in Ocean Dynamics
Journal of Physical Oceanography, 2002 Abstract The Ertel potential vorticity theorem for stratified viscous fluids in a rotating system is analyzed herein. A set of “tracers,” that is, materially conserved scalar quantities, and the corresponding Ertel potential vorticities are used to obtain an absolute fluid velocity determination (including both horizontal and vertical components) that ...
Kurgansky, M. V. +2 more
openaire +2 more sources
International Journal of Climatology, EarlyView.To analyze the different morphologies of Rossby wave breaking over Eastern Siberia and their relationships with the anomalous patterns of temperature and precipitation that cause unseasonable midsummer weather conditions over Japan, we performed regression analyses against the interannual variabilities of the anticyclonic and cyclonic Rossby wave ...
Kazuto Takemura
wiley +1 more source
Eastern boundary drainage of the North Atlantic subtropical gyre
, 2014 24 pages, 17 figures, 4 tablesThe eastern boundary of the North Atlantic subtropical gyre (NASG) is an upwelling favorable region characterized by a mean southward flow.
Machín, Francisco +6 more
core +1 more source
On the dynamical influence of ocean eddy potential vorticity fluxes [PDF]
, 2015 The impact of eddy potential vorticity fluxes on the dynamical evolution of the flow is obscured by the presence of large and dynamically-inert rotational fluxes. However, the decomposition of eddy potential vorticity fluxes into rotational and divergent
Maddison, James +8 more
core +1 more source
Potential Vorticity Formulation of Compressible Magnetohydrodynamics [PDF]
Physical Review Letters, 2013 Compressible ideal magnetohydrodynamics (MHD) is formulated in terms of the time evolution of potential vorticity and magnetic flux per unit mass using a compact Lie bracket notation. It is demonstrated that this simplifies analytic solution in at least one very important situation relevant to magnetic fusion experiments.
openaire +3 more sources
International Journal of Climatology, EarlyView.This study investigates summer Greenland atmospheric blocking using the Lagrangian tracking Python package blocktrack applied to ERA5 reanalysis and CMIP6 models. Two types of blocks—upstream (Northern Canada origin) and retrograding (Northern Atlantic origin)—are distinguished, with upstream blocks driving recent observed frequency increasing trends ...
Michele Filippucci +2 more
wiley +1 more source
Ertel's Potential Vorticity and Irreversible Processes
Zeitschrift für Naturforschung A, 1995 According to Ertel's potential vorticity the thermodynamical parameters in the equation of state define the forces which move the vortices and modify them in space and time.
H.-J. Treder, W. Schröder
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Optical Skyrmions with Tunable or Reconfigurable Topology Using Spin‐Decoupled Metaoptics
Laser &Photonics Reviews, EarlyView.The work introduces advanced optical elements capable of generating and dynamically reconfiguring complex light patterns known as optical skyrmions. By precisely shaping light polarization at the nanoscale, a single engineered metasurface can generate and manipulate robust and tunable polarization textures in an efficient and scalable way.
Andrea Vogliardi +5 more
wiley +1 more source
mathewbarlow/potential-vorticity: First release
, 2017 <p>minor changes from initial code: -for tropopause ID, works down from 10hPa rather than top -small plotting changes</p ...
Mathew Barlow
core +1 more source
On Ertel’s Potential Vorticity Theorem. On the Impermeability Theorem for Potential Vorticity
Journal of the Atmospheric Sciences, 1999 Abstract Potential vorticity (PV) is usually defined as αω · gradϕ, where α is the specific volume, ω is vorticity, and ϕ is any quantity, usually a conserved one. The most common derivation of the PV theorem therefore uses the component of the vorticity equation normal to the ϕ surfaces. Since PV can also be expressed as α div(u × gradϕ) and α div(ωϕ),
openaire +1 more source