Study On Radiation Parameterization Schemes In Meso-scale Model

As an important physics process of numerical weather prediction (NWP), radiation parameterization schemes are focused on by national experts. In order to compare the impact of radiation parameterization schemes on simulated short-range weather process and improve the radiation parameterization schemes in Meso-scale Model Version 5(MM5), the scheme of Goddard short wave radiation parameterization has been replanted from Weather Research and Forecast Model (WRF) to MM5. With the planted scheme and radiation parameterizations in MM5 four groups experiment schemes have been designed to simulate 'sinlaku' typhoon (2002) and the case of snowfall occurred in 19-24 December 2002. The results show that selection of radiation parameterization schemes has distinct impact on the simulated results. The results simulated by the group with detailed long-wave and short-wave radiation parameterization scheme reflect plateau terrain and typhoon, cloud, subtropical high, trough/ridge more particularly and reasonably ;Intensity of typhoon rainfall center is improved 1/3, there have been some improvements on intensity of the north heavy snow, more approach the observation.