大气科学2011，Vol.35Issue(6)：1177-1186,10.
全球和区域气候模式对中国东部夏季降水季节演变模拟的比较
Comparison between the Results on Seasonal Evolution of Summer Precipitation over Eastern China Simulated by a Regional Climate Model and the Driving GCM
摘要
Abstract
The authors compared the simulations of seasonal evolution of rainfall over eastern China and the associated large-scale circulation during summer by a coupled general circulation model (CGCM, MIR0C3. 2_hires) and the nested regional climate model (RegCM3). Results show that both the MIR0C3. 2_hires and RegCM3 can reproduce the basic features of summer mean atmospheric circulation, and the spatial distribution of precipitation in Chinacharacterized by a decrease from the southeast to northwest of China Compared with observations, the MIR0C3. 2_ hires simulates a more extensive area of heavy rainfall over South China, while the RegCM3 presents more reasonable spatial distribution of rainfall over this region.The improvement of simulation by RegCM3 is more evident in the seasonal evolution than that by the driving CGCM. It is found that the MIR0C3. 2_hires fails to reproduce the seasonal evolution of rain band by presenting the precipitation maximum stagnating over South China during the whole summer period. Meanwhile, the RegCM3 can basically capture the seasonal evolution of rainfall over eastern China during summer, characterized by three stepwise stages, I.e. Pre-summer rainy season in South China, Meiyu period in the Yangtze River valley, and rainy season in North China. It suggests that the better simulation of seasonal evolution of wind in both the lower and upper troposphere may be important for the improvements of RegCM3 in simulating the seasonal rainfall evolutioa关键词
区域气候模式/夏季降水/中国东部/季节演变Key words
regional climate model, summer precipitation, eastern China, seasonal evolution分类
天文与地球科学引用本文复制引用
徐璇,陆日宇,石英..全球和区域气候模式对中国东部夏季降水季节演变模拟的比较[J].大气科学,2011,35(6):1177-1186,10.基金项目
国家自然科学基金委—云南联合基金重点项目U0933603,国家重点基础研究发展规划项目2009CB421407,国家自然科学基金资助项目40975041 （）
