Results 11 to 20 of about 10,485 (275)

A Simple Eddy Potential Vorticity Flux Closure

Journal of Advances in Modeling Earth Systems, 2023
It is shown that within the limits of quasi‐geostrophic scaling, biharmonic mixing of potential vorticity is equivalent to biharmonic lateral friction together with biharmonic isopycnal thickness mixing in primitive equations, all with the same viscosity.
Carsten Eden
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Inversion of Potential Vorticity Density [PDF]

Journal of the Atmospheric Sciences, 2017
Abstract Inversion of potential vorticity density with absolute vorticity and function η is explored in η coordinates. This density is shown to be the component of absolute vorticity associated with the vertical vector of the covariant basis of η coordinates. This implies that inversion of in η coordinates is a two-dimensional problem in
Egger, Joseph, Hoinka, Klaus-Peter, Spengler, Thomas   +2 more
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On the definition of a moist‐air potential vorticity [PDF]

Quarterly Journal of the Royal Meteorological Society, 2013
AbstractA new potential vorticity is derived by using a specific entropy formulation expressed in terms of a moist‐air entropy potential temperature. The new formulation is compared with Ertel's version and with others based on virtual and equivalent potential temperatures.
Pascal Marquet, Marquet, Pascal
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Piecewise uniform potential vorticity pancake shielded vortices [PDF]

Geophysical & Astrophysical Fluid Dynamics, 2017
Shielded vortices consist of a core of potential vorticity (PV) of a given sign surrounded (or shielded) by a layer of opposite-signed PV. Such vortices have specific properties and have been the focus of numerous studies, first in two dimensional geometries (where PV is just the vertical component of the vorticity vector) and in geophysical ...
Reinaud, Jean Noel
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Three-dimensional potential vorticity structures for extreme precipitation events on the convective scale

Tellus: Series A, Dynamic Meteorology and Oceanography, 2020
Three-dimensional potential vorticity (PV) structures on the convective scale during extreme precipitation events are investigated. Using the high resolution COSMO-REA2 data set, 3D composites of the PV, with and without Coriolis parameter and related ...
Annette Müller, Benjamin Niedrich, Peter Névir   +2 more
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Impacts of the antartic ozone hole influence events over southern Brazil in October 2015 [PDF]

Anais da Academia Brasileira de Ciências, 2023
The impact of the Antarctic Ozone Hole Influence over Southern Brazil in October 2015 was analyzed using daily mean data of the Total Column Ozone (TCO), Ultraviolet Index (UVI) and Radiative Cloud Fraction (RCF) from the Ozone Monitoring Instrument ...
ALANNA M. DE SOUZA, LUCAS V. PERES, GABRIELA D. BITTENCOURT, DAMARIS K. PINHEIRO, BIBIANA C. LOPES, VAGNER ANABOR, NEUSA M.P. LEME, MARIA PAULETE P. MARTINS, RODRIGO DA SILVA, GABRIELA C.G. DOS REIS, MARCO ANTÔNIO G. DOS REIS, JOSÉ V. BAGESTON, HASSAN BENCHERIF   +12 more
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Urbanization may enhance tornado potential: A single case report

Frontiers in Earth Science, 2023
Tornadoes pose a risk of catastrophic economic loss and casualty in the United States. Modification of land use by urbanization alters the meteorological conditions that may impact tornado formation and intensification processes.
Jiwen Fan, Jingyu Wang, Jingyu Wang, Yun Lin, Yun Lin   +4 more
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Influence of bottom topography on integral constraints in zonal flows with parameterized potential vorticity fluxes [PDF]

, 2013
An integral constraint for eddy fluxes of potential vorticity (PV), corresponding to global momentum conservation, is applied to two-layer zonal quasi-geostrophic channel flow. This constraint must be satisfied for any type of parameterization of eddy PV
Zalesny, V.B., Blaker, A.T., Marsh, R., Ivchenko, V.O., Sinha, B.   +4 more
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A Breakdown in Potential Vorticity Estimation Delineates the Submesoscale‐to‐Turbulence Boundary in Large Eddy Simulations

Journal of Advances in Modeling Earth Systems, 2020
Most submesoscale motions—fronts, eddies, filaments, and even large internal waves—are sufficiently rapidly rotating and stratified as to be strongly influenced by potential vorticity dynamics.
Abigail S. Bodner, Baylor Fox‐Kemper
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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
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