Models are initialized using this observed data. The irregularly spaced observations are processed by data assimilation and objective analysis methods, which perform quality control and obtain values at locations usable by the model's mathematical algorithms (usually an evenly spaced grid). The data are then used in the model as the starting point for a forecast.University Corporation for Atmospheric Research (August 14, 2007). "The WRF Variational Data Assimilation System (WRF-Var)". Retrieved May 25, 2008. Commonly, the set of equations used to predict the physics and dynamics of the atmosphere are called primitive equations. These are initialized from the analysis data and rates of change are determined. The rates of change predict the state of the atmosphere a short time into the future. The equations are then applied to this new atmospheric state to find new rates of change, which predict the atmosphere at a yet further time into the future. This time stepping procedure is continually repeated until the solution reaches the desired forecast time.
Models are initialized using this observed data The irregularly spaced observations are processed by data assimilation and objective analysis methods which perform quality control and obtain values at locations usable by the model's mathematical algorithms (usually an evenly spaced grid) The data are then used in the model as the starting point for a forecastUniversity Corporation for Atmospheric Research (August 14 2007) "The WRF Variational Data Assimilation System (WRF-Var)" Retrieved May 25 2008 Commonly the set of equations used to predict the physics and dynamics of the atmosphere are called primitive equations These are initialized from the analysis data and rates of change are determined The rates of change predict the state of the atmosphere a short time into the future The equations are then applied to this new atmospheric state to find new rates of change which predict the atmosphere at a yet further time into the future This time stepping procedure is continually repeated until the solution reaches the desired forecast time