Development of a new hybrid cumulus parameterization scheme for use in nonhydrostatic weather prediction models

• Antragsteller: Professor Dr. Andreas Bott
• Fachliche Zuordnung: Physik und Chemie der Atmosphäre
• Förderung: Förderung von 2004 bis 2011
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 5426541

The purpose of the proposed research project is to develop a new nonlocal and hybrid cumulus parameterization (NHCP) scheme for use in nonhydrostatic numerical weather prediction (NWP) models. NHCP will be based on a mass flux approach. By implementing NHCP in a NWP model the following forecast skills shall be improved: i) spatial and temporal distribution of convective clouds and precipitation, ii) stratiform precipitation as induced by convective overturning, iii) subgrid-scale peak values of convective precipitation, iv) mesoscale organization of cumulus convection. The nonlocal character of the NHCP scheme is given by the fact that the evolving cumulus cloud will not be fixed to a particular grid point, instead it may be transported over several grid points so that cloud mass fluxes are locally not balanced. Furthermore, cumulus convection will be treated in a hybrid way, that is only parts of a cumulus convection event will be parameterized, certain cloud processes will be directly considered in the dynamic model. During the first two years of the proposed research the principle core of the NHCP scheme shall be developed.

• DFG-Verfahren: Schwerpunktprogramme
• Teilprojekt zu: SPP 1167: Quantitative Niederschlagsvorhersage