Physical initialisation of precipitation in a mesoscale numerical weather forecast model [Elektronische Ressource] / vorgelegt von

Physical Initialisation ofPrecipitation in a MesoscaleNumerical Weather ForecastModelDissertationzurErlangung des Doktorgrades (Dr. rer. nat.)derMathematisch-Naturwissenschaftlichen Fakult¨atderRheinischen Friedrich-Wilhelms-Universit¨at Bonnvorgelegt vonMarco MilanausS. Pietro in GuBonn, 2009Angefertigt mit Genehmigung der Mathematisch-NaturwissenschaftlichenFakult¨at der Rheinischen Friedrich-Wilhelms-Universit¨at Bonn1. Referent: Prof. Dr. Clemens Simmer2. Referent: Prof. Dr. Andreas HenseTag der Promotion: 02/02/2010Erscheinungsjahr: 2010AbstractShort term quantitative precipitation forecast (QPF) is an important taskfor numerical weather prediction (NWP) models, particularly in summer.The increase of model resolution requires the understanding of the initiationand evolution of convection. Initialisation schemes based on radar derivedprecipitation fields can reduce the model forecast error in convective cases.Any improvement of QPF denotes a correct forecast of the dynamics and themoisture content ofthe atmosphere, thus upgradingQPF generically improvesNWP forecast.Themethod,whichwecallPhysical initialisationBonn(PIB),usesasthemostimportantinputtheprecipitationestimation fromtheGermanweather service(DWD) radar network and assimilates the data into the operational non-hydrostatic COSMO model.