摘要
通过对 1 881～ 2 0 0 0年东北亚夏季气温的分析 ,发现东北亚夏季气温有明显的年代际变化 ,时间尺度为 80年左右和 30年左右 ;1 2 0年来东北亚共发生 2 7次冷夏 (平均气温距平≤ - 0 5℃ ) ,其中 6次为严重冷夏 (平均气温距平≤ - 1 0℃ )。通过对海平面气压场、对流层中层 5 0 0hPa高度场及海温场的分析 ,研究了东北亚冷夏的环流机制以及与SST异常的关系 。
Obvious inter decadal variability of summer temperature over northeastern Asia has been found through the analysis of summer temperature over Northeastern Asia. The time scale is about 80 years and 30 years. There are 27 cool summers in 120 years period, and the 6 of 27 cool summers are serious cool summers. The relationship between the circulation mechanism of cool summer and SST has been studied by analysis on SLP, 500 hPa geopotential height and SST. It is pointed out that the inter decadal variability of the summer temperature over northeastern Asia has close relationship with the large-scale circulation and the SST.
出处
《大气科学》
CSCD
北大核心
2004年第2期241-253,i003,共14页
Chinese Journal of Atmospheric Sciences
基金
国家自然科学基金资助项目 40 2 0 5 0 1 1
关键词
年代际变化
高度场
海温场
大尺度环流特征
海温
northeastern Asia
cool summer
inter decadal variability
large-scale circulation feature
