Title: SENSITIVITY OF SINGLE-YEAR SEASONAL PRECIPITATION TO PARAMETERIZATION IN THE WEATHER RESEARCH AND FORECASTING (WRF) MODEL
Abstract: The production of precipitation in a regional climate model (RCM) is handled primarily by the microphysics and cumulus physics parameterizations. Application of the WRF model as an RCM to a mid-latitude Japan case and tropical Philippine case using single-year simulation sensitivity experiment showed scheme sensitivity to simulation of precipitation and exploration of potential transferability of the schemes to different climate regime applications. Results show that simulations can capture seasonal 2-meter air temperature well and demonstrate capability in simulating seasonal precipitation for both application. Results show that cumulus (microphysics) scheme sensitivity is higher in simulating seasonal and monthly precipitation when larger fraction of precipitation is convective (non-convective). Precipitation sensitivity to cumulus scheme showed largest variation in warm season for Japan case and in all seasons in Philippine case. It has been found that Kain-Fritsch (KF) scheme tend to overestimate precipitation in hot humid climate regime application and Grell-3 (GR) scheme showed the most consistent good skill performance throughout the seasons for both applications. CU scheme selection showed higher impact for simulating precipitation in the model than the MP scheme selection.