In this paper the numerical comparative experiments on sensitivity of thephysical dissipative technique to the precipitation parameterizations, especially the differentcombination of the explicit micro-physical scheme...In this paper the numerical comparative experiments on sensitivity of thephysical dissipative technique to the precipitation parameterizations, especially the differentcombination of the explicit micro-physical schemes and cumulus convection parameterizations, in thePSU/NCAR mesoscale model MM5V3 with a triple-nested domain are conducted using the case of heavyrain occurring in the northern China in October 2003. The experiments have revealed some meaningfulresults, notably the dramatic improvement in the simulative accuracy and quality by the physicaldissipative technique based on the second law of thermodynamics, meanwhile, the weak sensitivity ofthe technique to the schemes of parameterization resulting mainly from improving the field ofrainfall by the physical dissipative technique has been reached via improving the outputs of themodel variables such as wind field determining the divergence field that is one of the mostimportant factors in the case of designing the schemes of precipitation parameterization.展开更多
基金This work is supported by the Project of the Special Funds of Social Public Good for Scientific Research Institutions (in China)under Contract 2002DIA20013.
文摘In this paper the numerical comparative experiments on sensitivity of thephysical dissipative technique to the precipitation parameterizations, especially the differentcombination of the explicit micro-physical schemes and cumulus convection parameterizations, in thePSU/NCAR mesoscale model MM5V3 with a triple-nested domain are conducted using the case of heavyrain occurring in the northern China in October 2003. The experiments have revealed some meaningfulresults, notably the dramatic improvement in the simulative accuracy and quality by the physicaldissipative technique based on the second law of thermodynamics, meanwhile, the weak sensitivity ofthe technique to the schemes of parameterization resulting mainly from improving the field ofrainfall by the physical dissipative technique has been reached via improving the outputs of themodel variables such as wind field determining the divergence field that is one of the mostimportant factors in the case of designing the schemes of precipitation parameterization.
