|Title||Operational assimilation of space-borne radar and lidar cloud profile observations for numerical weather prediction. Feasibility demonstration of 4D-Var assimilation system using CloudSat and CALIPSO observations|
|Series/Collection||ESA Contract Report|
|Authors||Janiskova, M, Fielding, M|
|Event Series/Collection||ESA Contract Report|
This report describes the data assimilation system at European Centre for Medium Range Weather Forecasts (ECMWF) prepared for feasibility demonstration of direct inclusion of cloud radar and lidar observations into the Four-Dimensional Variational (4D-Var) system. It provides information on observations, their errors and the used observation operators. The necessary data handling for observations in the data assimilation system, such as quality control and bias correction is also briefly summarized.
4D-Var assimilation experiments have been performed using CloudSat (NASA's cloud radar mission) cloud radar reflectivity and CALIPSO Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) lidar backscatter observations, either separately or in combination. Obtained results indicate that 4D-Var