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RISBarotropic Influences on the Growth and Decay of Nonlinear Baroclinic Waves
Publisher: American Meteorological Society
Abstract: nonlinear behavior of baroclinic waves is studied by means of numerical integrations of the primitive equations for initial zonal-mean states with almost identical temperature fields but differing barotropic flow components. ...
Numerical Simulation of an Explosively Deepening Cyclone over the North Atlantic that was Unaffected by Concurrent Surface Energy Fluxes
Publisher: American Meteorological Society
Abstract: The effect of surface sensible and latent heat fluxes on explosive cyclogenesis has been found to be quite variable. Sensitivity tests reveal little or no influence in some cases and dramatic effects in others. However, ...
The Downstream and Upstream Development of Unstable Baroclinic Waves
Publisher: American Meteorological Society
Abstract: The response of a baroclinically unstable atmosphere to a localized initial perturbation is examined. In a preliminary numerical experiment, using a nonlinear primitive-equation model with spherical geometry, new disturbances ...
The Life Cycles of Some Nonlinear Baroclinic Waves
Publisher: American Meteorological Society
Abstract: Some aspects of the nonlinear behavior of mid-latitude baroclinic waves are investigated by means of a series of integrations of the primitive equations with spherical geometry. Each integration has as initial conditions ...
The Concept of Essential Climate Variables in Support of Climate Research, Applications, and Policy
Publisher: American Meteorological Society
Abstract: esearch, monitoring, prediction, and related services rely on accurate observations of the atmosphere, land, and ocean, adequately sampled globally and over sufficiently long time periods. The Global Climate Observing ...
The Determination of the Surface Stress in an Atmospheric Model
Publisher: American Meteorological Society
Abstract: By forcing a third-generation wave-prediction model with surface stresses from the European Centre for Medium-Range Weather Forecasts (ECMWF) atmospheric model, it was discovered that lower wave heights were generated than ...
High Clouds over Oceans in the ECMWF 15- and 45-Yr Reanalyses
Publisher: American Meteorological Society
Abstract: The reanalysis programs of numerical weather prediction (NWP) centers provide global, comprehensive descriptions of the atmosphere and of the earth?s surface over long periods of time. The high realism of their representation ...
Implementation of the Semi-Lagrangian Method in a High-Resolution Version of the ECMWF Forecast Model
Publisher: American Meteorological Society
Abstract: In this article the implementation of the semi-Lagrangian method in a high-resolution version of the ECMWF forecast model is examined. Novel aspects include the application of the semi-Lagrangian scheme to a global model ...
ECMWF Analyses and Forecasts of Stratospheric Winter Polar Vortex Breakup: September 2002 in the Southern Hemisphere and Related Events
Publisher: American Meteorological Society
Abstract: Breakup of the polar stratospheric vortex in the Northern Hemisphere is an event that is known to be predictable for up to a week or so ahead. This is illustrated using data from the 45-yr ECMWF Re-Analysis (ERA-40) for ...
Diagnostic Comparison of Meteorological Analyses during the 2002 Antarctic Winter
Publisher: American Meteorological Society
Abstract: Several meteorological datasets, including U.K. Met Office (MetO), European Centre for Medium-Range Weather Forecasts (ECMWF), National Centers for Environmental Prediction (NCEP), and NASA?s Goddard Earth Observation ...