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RISThe Euler Equations of Motion with Hydrostatic Pressure as an Independent Variable
Publisher: American Meteorological Society
Abstract: A novel form of the Euler equations is developed through the use of a different vertical coordinate system. It is shown that the use of hydrostatic pressure as an independent variable has the advantage that the Euler ...
Resolved Scales and Nonlinear Interactions in Limited-Area Models
Publisher: American Meteorological Society
Abstract: A procedure for identifying the resolved scales in nested limited-area models (LAMs) and for computing the nonlinear interactions between these scales is sketched in this paper. The spectral perspective is adopted and ...
A Spectral General Circulation Model Using a Piecewise-Constant Finite-Element Representation on a Hybrid Vertical Coordinate System
Publisher: American Meteorological Society
Abstract: A numerical scheme for the vertical discretization of primitive equations in a generalized pressure-type coordinate is developed through application of the Galerkin formalism with piecewise-constant finite elements: this ...
A General Filter for Stretched-Grid Models: Application in Cartesian Geometry
Publisher: American Meteorological Society
Abstract: lobal climate models with variable resolution are effective means to represent regional scales over an area of interest while avoiding the nesting issues of limited-area models. The stretched-grid approach provides a ...
A Semi-Implicit Semi-Lagrangian Regional Climate Model: The Canadian RCM
Publisher: American Meteorological Society
Abstract: A new regional climate model (RCM) is presented in this paper and its performance is investigated through a pair of 60-day simulations. This new model is based on the dynamical formulation of the Cooperative Centre for ...
A Methodology for the Regional-Scale-Decomposed Atmospheric Water Budget: Application to a Simulation of the Canadian Regional Climate Model Nested by NCEP–NCAR Reanalyses over North America
Publisher: American Meteorological Society
Abstract: The purpose of this work is to study the added value of a regional climate model with respect to the global analyses used to drive the regional simulation, with a special emphasis on the nonlinear interactions between ...
Sensitivity of Internal Gravity Waves Solutions to the Time Step of a Semi-Implicit Semi-Lagrangian Nonhydrostatic Model
Publisher: American Meteorological Society
Abstract: The combination of semi-implicit and semi-Lagrangian marching algorithms leads to stable integration of the meteorological equations with long time steps even for large advecting velocities and fast-moving free waves. In ...
A General Filter for Stretched-Grid Models: Application in Two-Dimension Polar Geometry
Publisher: American Meteorological Society
Abstract: ariable-resolution grids are used in global atmospheric models to improve the representation of regional scales over an area of interest: they have reduced computational cost compared to uniform high-resolution grids, and ...
Diversity in Interpretations of Probability: Implications for Weather Forecasting
Publisher: American Meteorological Society
Abstract: Over the last years, probability weather forecasts have become increasingly popular due in part to the development of ensemble forecast systems. Despite its widespread use in atmospheric sciences, probability forecasting ...