摘要
本文利用1951—1980年逐季的平均值资料(共120个季)讨论了北方涛动和与其相联系的北太平洋海温与北半球海平面气压场、500hPa位势高度场遥相关的基本结构,并与南方涛动和赤道东太平洋海温的结果进行了对比分析.发现北太平洋Namias海区和加利福尼亚海流区海温的变化与北方涛动具有很密切的联系;北方涛动和这两个海区的海温同北半球中高纬度大气环流特别是PNA型和NAO型环流异常存在明显的遥相关关系;南方涛动和赤道太平洋海温同WP型或NPO型环流异常关系比较密切,而与PNA型和NAO型的关系不如北方涛动和Namias海区及加利福尼亚海流区海温的显著.
Basic structures of teleconnections between the Northern Oscillation, its associated North Pacific sea surface temperature (SST) and sea level pressure and 500 hPa geopotential height fields of the Northern Hemisphere are investigated by using seasonal-mean data spanning years 1951-1980 (120 seasons in all). The results are compared with those of the Southern Oscillation and the eastern equatorial Pacific SST. It is found that the SST anomalies in the Namias and California current regions of the North Pacific are closely associated with anomalies over the mid- and high-latitudes of the Northern Hemisphere, especially the Pacific/North America (PNA) and the North Atlantic Oscillation (NAO) anomaly patterns are highly related to the Northern Oscillation and SST anomalies in the above two regions. The Southern Oscillation and the equatorial Pacific SST anomaly are highly related to the North Pacific Oscillation ( NPO) or the Western Pacific (WP) anomaly pattern, but their relations to PNA and NAO anomaly patterns are weaker in comparison with the Northern Oscillation and SST anomalies of the Namias and California current regions.
出处
《大气科学》
CSCD
北大核心
1991年第4期26-34,共9页
Chinese Journal of Atmospheric Sciences
基金
国家自然科学基金
关键词
北方涛动
海温
大气环流
遥相关
Northern Oscillation
Sea surface temperature
Height fields
Teleconnection patterns.
