利用PσRCM9区域气候模式,分析了中国夏季不同强度降水模拟对不同积云对流参数化方案的敏感性.结果表明,采用四种积云对流参数化方案,模式能够模拟出小雨、大雨和暴雨的雨量百分比和雨日百分比空间分布的一致性特征,但不能模拟出中雨雨量百分比和雨日百分比空间分布的相似性,这是由于模式不能模拟中雨雨量百分比的空间分布形式所致.还发现模拟的我国夏季降水以小雨和中雨为主,四种积云对流参数化方案均低估了中国夏季大雨和暴雨对总降水的贡献,尤其是在我国西部、东北和华北地区更明显.不同积云对流参数化方案下模拟的极端强降水阈值的空间分布形式基本与观测一致,但强度与观测存在较大差异.相比较而言,Grell方案较Kuo、Anthes-Kuo和Betts-Mille积云对流参数化方案更适合中国东南部地区夏季极端强降水的模拟.%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, respectively, but it cannot simulate that of moderate rain, because PσRCM9 poorly simulates the spatial distribution of precipitati-on 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 precipita-tion over Southeast China.
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