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RISDynamic Potential Vorticity Initialization and the Diagnosis of Mesoscale Motion
Publisher: American Meteorological Society
Abstract: A new method for diagnosing the balanced three-dimensional velocity from a given density field in mesoscale oceanic flows is described. The method is referred to as dynamic potential vorticity initialization (PVI) and is ...
Potential Vorticity and the Quasigeostrophic and Semigeostrophic MesoscaleVertical Velocity
Publisher: American Meteorological Society
Abstract: Results of a variety of numerical simulations are presented and the accuracy of quasigeostrophic (QG) and semigeostrophic (SG) vertical velocity estimates of the total vertical velocity is analyzed. The authors examine the ...
The Dependence of Rossby Wave Breaking on the Vertical Structure of the Polar Vortex
Publisher: American Meteorological Society
Abstract: The three-dimensional structure of wave propagation and breaking on the edge of polar vortices is examined using a multilayer quasigeostrophic model, with piecewise constant potential vorticity (PV) in each layer. The ...
The Diabatic Contour Advective Semi-Lagrangian Model
Publisher: American Meteorological Society
Abstract: This article describes a novel algorithmic development extending the contour advective semi-Lagrangian model to include nonconservative effects. The Lagrangian contour representation of finescale tracer fields, such as ...
Assessing the Numerical Accuracy of Complex Spherical Shallow-Water Flows
Publisher: American Meteorological Society
Abstract: The representation of nonlinear shallow-water flows poses severe challenges for numerical modeling. The use of contour advection with contour surgery for potential vorticity (PV) within the contour-advective semi-Lagrangian ...
The Diabatic Contour-Advective Semi-Lagrangian Algorithms for the Spherical Shallow Water Equations
Publisher: American Meteorological Society
Abstract: The diabatic contour-advective semi-Lagrangian (DCASL) algorithm is extended to the thermally forced shallow water equations on the sphere. DCASL rests on the partitioning of potential vorticity (PV) to adiabatic and ...
Toward a PV-Based Algorithm for the Dynamical Core of Hydrostatic Global Models
Publisher: American Meteorological Society
Abstract: he diabatic contour-advective semi-Lagrangian (DCASL) algorithms previously constructed for the shallow-water and multilayer Boussinesq primitive equations are extended to multilayer non-Boussinesq equations on the sphere ...
The Contour-Advective Semi-Lagrangian Algorithm for the Shallow Water Equations
Publisher: American Meteorological Society
Abstract: A new method for integrating shallow water equations, the contour-advective semi-Lagrangian (CASL) algorithm, is presented. This is the first implementation of a contour method to a system of equations for which exact ...
Revisiting Vacillations in Shallow-Water Models of the Stratosphere Using Potential-Vorticity-Based Numerical Algorithms
Publisher: American Meteorological Society
Abstract: olar vortex vacillations are investigated using long-term simulations of potential-vorticity (PV)-based shallow-water (SW) models for the stratosphere. In the models examined, mechanical forcing is applied through a ...