中文摘要：

利用一个全球海洋-大气-海冰耦合模式的300年控制试验资料,针对东亚区域雨带移动和大气环流特征演变的研究发现,华南春季降水是位于副热带的雨带的一部分,而且华南地区4、5月的降水异常具有明显的年际变化特征.在华南4、5月降水偏多年份,前期3月阿留申低压加强,北半球西风减弱,西太平洋海表温度出现负异常,导致冷暖空气在这里相遇造成降水异常.

英文摘要：

Based on a 300-year integration of a coupled oeean-atmospheresea ice climate model, named Bergen Climate Model, the spring rainfall in South China, including April and May, is part of rain helt over suhtropical area. Rainfall amount has obvious interannual variation. It is found that during positive years of spring precipitation in South China, strengthened Aleutian Ix）w, weakened westly and negative sea surface temperature anomaly （SSTA） over west Pacific in March contribute to positive precipitation anomaly in .South China.