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Global Atmospheric Model
The ECMWF Atmospheric Global Circulation is a general atmospheric model that describes the dynamical evolution of the atmosphere worldwide. It is executed at resolutions appropriate for medium-range (currently 9km), extended range (currently 36km), and seasonal forecasts (currently 36km). The model uses the most accurate estimate of the current conditions. It has the most up-to-date description of the model physics and includes atmospheric dynamical processes and a representation of the stratosphere. Throughout execution it employs modelled land surface conditions (e.g. snow cover, soil moisture, vegetation, etc.), and ocean conditions (e.g. sea-surface temperature, sea ice, etc.). Together these help deliver Rossby wave propagation, weather regime changes, etc.
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