摘要
利用欧洲中心全球客观分析的7层月平均位势高度距平资料,计算了几种大气环流遥相关型指数与各层位势高度距平的相关系数分布。发现:大气环流异常的正压、斜压性的地理差异与遥相关型的垂直结构关系密切。综合经验正交函数分析,结果亦然。
Based on ECMWF 7-level monthly mean geopoptential height anomaly data. the present paper has calculated the Correlation coefficient distribution of several key circulational teleconnection indices and the geopotential height anomaly of each level. Results show that the barotropieal and baroclinic geological difference of circulational abnormality is closely related to the vertical structure of the teleeonnection pattern with the PNA,WP,WA,EA and EU being barotropical; however, the correlation distribution of the SO index and height anomaly of each layer changes in the tropical Pacific from the east-west out-of-phase seesaw oscillation of the low troposphere into the even anticorrelation of the mid and high troposhere,whieh proves the existence of the strong baroclinity in east tropical Pacific. The cireulational abnormality from December to February in the tropical Indian Ocean appears to be barotropical;from June to August, baroclinic. Same results are obtained through analysis of hybrid empirical orthgonal functions.
出处
《南京气象学院学报》
CSCD
1993年第4期439-445,共7页
Journal of Nanjing Institute of Meteorology
关键词
遥相关型
正斜压性
大气环流
teleconnection pattern,vertical structure,barotropy and baroclinity,correlation distribution,hybrid empirical orthgonal functions
