Sensitivity of Simulation of Different Intensity of Summer Precipitation over China to Different Cumulus Convection Parameterization Schemes

The sensitivity of simulation of different intensity of summer precipitation over China to different cumulus convection parameterization schemes has been studied by using thePσRCM9 regional climate model. Results show that under the four cumulus convective parameterization schemes, PσRCM9 has good performance in simulating the spatial consistency of rainfall percentage and rain day percentage of light, heavy, and torrential rain, espectively, but it cannot simulate that of moderate rain, because PσRCM9 poorly simulates the spatial distribution of precipitation percentage for the moderate rain. It is also found that the simulated summer precipitation over China under the four cumulus convection schemes is mainly light and moderate rain, all of them underestimate the contribution of heavy and torrential rain to the total rainfall over China and cannot simulate the heavy and torrential rain over West China, Northeast China, and North China. The spatial distribution of the simulated summer extreme precipitation threshold over China with different convective schemes is basically consistent with the observation, but the intensity of the simulated extreme precipitation is very different from the observation. Compared with Kuo, Anthes-Kuo and Betts-Miller cumulus convection schemes, Grell scheme has good ability in simulating the summer extreme precipitation over Southeast China.