The ECMWF forecasting and assimilation system

• The ECMWF global atmospheric model
• The dynamic ocean model
• The ECMWF data assimilation and analysis system
• Retrieving ECMWF deterministic forecasts
• The relation between grid point values and observations
• Some characteristics of deterministic NWP

The ECMWF forecasting system consists of several components: an atmospheric general cir­culation model, an ocean wave model, a land surface model, an ocean general circulation model, a data assimilation system and ensemble forecasting systems (see Chapter 3), producing forecasts from days to weeks and months ahead.