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RISA Mass-Conserving Semi-Lagrangian Scheme for the Shallow-Water Equations
Publisher: American Meteorological Society
Abstract: By generalizing the algorithm of Priestley for passively advected fields, a mass-conserving scheme for the coupled shallow-water equations is obtained. It is argued that the interpolation step of semi-Lagrangian schemes ...
Variable Resolution and Robustness
Publisher: American Meteorological Society
Abstract: Within the context of a semi-Lagrangian shallow-water model, the dependence of forecast accuracy on the distribution of variable resolution and its robustness with respect to rapid variations in resolution is examined. ...
A Stability Analysis of a Family of Baroclinic Semi-Lagrangian Forecast Models
Publisher: American Meteorological Society
Abstract: The computational stability of a family of recently introduced semi-Lagrangian schemes for baroclinic models is analyzed to better explain their observed behavior and to provide additional theoretical justification. The ...
A Generalized Family of Schemes that Eliminate the Spurious Resonant Response of Semi-Lagrangian Schemes to Orographic Forcing
Publisher: American Meteorological Society
Abstract: The one-parameter three-time-level family of O(?t2)-accurate schemes, introduced in Rivest et al. to address the problem of the spurious resonant response of semi-implicit semi-Lagrangian schemes at large Courant number, ...
Improving Variable-Resolution Finite-Element Semi-Lagrangian Integration Schemes by Pseudostaggering
Publisher: American Meteorological Society
Abstract: It is known that straightforward finite-difference and finite-element discretizations of the shallow-water equations, in their primitive (u?v) form, can lead to energy propagation in the wrong direction for the small scales. ...
The Operational CMC–MRB Global Environmental Multiscale (GEM) Model. Part II: Results
Publisher: American Meteorological Society
Abstract: An integrated forecasting and data assimilation system has been and is continuing to be developed by the Meteorological Research Branch (MRB) in partnership with the Canadian Meteorological Centre (CMC) of Environment ...
The Operational CMC–MRB Global Environmental Multiscale (GEM) Model. Part I: Design Considerations and Formulation
Publisher: American Meteorological Society
Abstract: An integrated forecasting and data assimilation system has been and is continuing to be developed by the Meteorological Research Branch (MRB) in partnership with the Canadian Meteorological Centre (CMC) of Environment ...
The CMC–MRB Global Environmental Multiscale (GEM) Model. Part III: Nonhydrostatic Formulation
Publisher: American Meteorological Society
Abstract: An integrated forecasting and data assimilation system has been and is continuing to be developed by the Meteorological Research Branch (MRB) in partnership with the Canadian Meteorological Centre (CMC) of Environment ...
Staggered Vertical Discretization of the Canadian Environmental Multiscale (GEM) Model Using a Coordinate of the Log-Hydrostatic-Pressure Type
Publisher: American Meteorological Society
Abstract: he Global Environmental Multiscale (GEM) model is the Canadian atmospheric model used for meteorological forecasting at all scales. A limited-area version now also exists. It is a gridpoint model with an implicit semi-Lagrangian ...