摘要
用１９５１～１９９５年的北半球大气环流特征量资料，计算了它们的长期趋势变化。结果表明，近４５年西太平洋副高与极涡强度都趋加强，纬向环流趋于加强，经向环流则趋减弱。这种环流的长期趋势变化及年代际变化是我国冬季气温长期趋势变化的一个直接原因。突变分析表明，不连续变化主要发生在１９７６年及８０年代初。
In the context of 1951～1995 characteristic quantities of northern circulations the secular trends of circulation variations were investigated. It turns out that for the past 45 years or so the western Pacific subtropical highs and polar vortices were intensified, and so were zonal circulations as opposed to meridional ones. Abrupt change investigation shows that discontinuity occurred largely in 1976 and early in the 1980s. The secular trends and decadal variation in these circulations represent one immediate cause of the evolution in winter temperature trend in China on a long term basis.
出处
《南京气象学院学报》
CSCD
1996年第3期283-289,共7页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金
关键词
大气环流
年际变化
变化趋势
特征量
variation in trend, interdecadal change, atmospheric circulation
