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RISGravity Wave Diagnosis Using Empirical Normal Modes
Publisher: American Meteorological Society
Abstract: The theory of empirical normal modes (ENMs) is adapted to diagnose gravity waves generated by a relatively high-resolution numerical model solving the primitive equations. The ENM approach is based on the principal component ...
Gravity Waves from Fronts: Parameterization and Middle Atmosphere Response in a General Circulation Model
Publisher: American Meteorological Society
Abstract: Current parameterizations of the gravity wave processes that are relevant to middle atmosphere general circulation modeling need to have specified somewhere in the lower atmosphere a number of characteristics of the gravity ...
Assimilation with an Ensemble Kalman Filter of Synthetic Radial Wind Data in Anisotropic Turbulence: Perfect Model Experiments
Publisher: American Meteorological Society
Abstract: The ensemble Kalman filter (EnKF) developed at the Meteorological Research Branch of Canada is used in the context of synthetic radial wind data assimilation at the mesoscale. A dry Boussinesq model with periodic boundary ...
A Regional Ensemble Prediction System Based on Moist Targeted Singular Vectors and Stochastic Parameter Perturbations
Publisher: American Meteorological Society
Abstract: A regional ensemble prediction system (REPS) with the limited-area version of the Canadian Global Environmental Multiscale (GEM) model at 15-km horizontal resolution is developed and tested. The total energy norm singular ...
Theoretical and Numerical Analysis of a Class of Semi-Implicit Semi-Lagrangian Schemes Potentially Applicable to Atmospheric Models
Publisher: American Meteorological Society
Abstract: n this paper, theoretical and numerical analyses of the properties of some complex semi-Lagrangian methods are performed to deal with the issues of the instability associated with the treatment of the nonlinear part of the ...
Toward Random Sampling of Model Error in the Canadian Ensemble Prediction System
Publisher: American Meteorological Society
Abstract: An updated global ensemble prediction system became operational at the Meteorological Service of Canada in July 2007. The new elements of the system include the use of 20 members instead of 16, a single dynamical core [the ...
Atmospheric Data Assimilation with an Ensemble Kalman Filter: Results with Real Observations
Publisher: American Meteorological Society
Abstract: An ensemble Kalman filter (EnKF) has been implemented for atmospheric data assimilation. It assimilates observations from a fairly complete observational network with a forecast model that includes a standard operational ...
GEPS-Based Monthly Prediction at the Canadian Meteorological Centre
Publisher: American Meteorological Society
Abstract: ynamical monthly prediction at the Canadian Meteorological Centre (CMC) was produced as part of the seasonal forecasting system over the past two decades. A new monthly forecasting system, which has been in operation since ...
Impact of Surface Parameter Uncertainties within the Canadian Regional Ensemble Prediction System
Publisher: American Meteorological Society
Abstract: he aim of this study is to assess the impact of uncertainties in surface parameter and initial conditions on numerical prediction with the Canadian Regional Ensemble Prediction System (REPS). As part of this study, the ...
An Overview of the Beijing 2008 Olympics Research and Development Project (B08RDP)
Publisher: American Meteorological Society
Abstract: ng 2008 Olympics Research and Development Project (B08RDP), initiated in 2004 under the World Meteorological Organization (WMO) World Weather Research Programme (WWRP), undertook the research and development of mesoscale ...