1880—2006年中国夏季雨带类型的年代际变化特征  

Decadal Variation of Summer Rain-Pattern in China During 1880-2006

作　　者：赵振国[1] 朱艳峰[1] 柳艳香[1] 许力[1] 孙林海[1] 李想[1] 

机构地区：[1]中国气象局气候研究开放实验室,北京100081

出　　处：《气候变化研究进展》2008年第2期95-100,共6页Climate Change Research

基　　金：国家自然科学基金项目(40505014;40675038)资助

摘　　要：利用1880—2006年中国东部地区夏季降水量及1951—2006年中国160个站夏季降水量和北半球大气环流资料,在夏季降水分型的基础上,研究了夏季雨型的年代际变化规律,分析了夏季各类雨型所对应的北半球500hPa环流场的主要特征。结果表明:东部季风区和西部区存在着20～40a左右的年代际振荡趋势,东北区则表现为明显的15a左右的年代际变化特点;东部季风区四类雨型东亚大气环流差异显著,西部区二类雨型和东北区二类雨型欧亚大气环流的配置基本都相反。Based on the summer precipitation data in eastern China during 1880- 2006 and at 160 stations in China during 1951-2006, and 500 hPa geopotential height data in the North Hemisphere during 1951-2006, the decadal variation law of summer rain-pattern was explored. The results show that there existed obvious 20-to 40-year period in the eastern monsoon region and the western region, and about 15-year period in the northeastern region of China. Additionally, the main features ofgeopotential heights at 500 hPa in the Northern Hemisphere for different summer rain-patterns were analyzed. Results show obvious differences of East Asian circulation for four rain-patterns in the eastern monsoon region, and the basically opposite allocation of Eurasia circulation pattern between the two rain- patterns in the western region and the two rain-patterns in the northeastern China.

关 键 词：中国 夏季雨型 年代际变化 环流特征 

分 类 号：P426.6[天文地球—大气科学及气象学] P468.024