近百年北半球冬季海平面气压场与冬季气温的多时间尺度相关

On space/time structuers of the 1884~1994 sea level pressure related to northern winter temperature at multi time scales

用 1 8 84～ 1 994年资料研究了北半球冬季海平面气压距平场的时空结构及其与北半球冬季气温的相关关系。指出 ,近百年北半球冬季大尺度海平面气压场表现为4个基本模态。研究了这些模态的空间环流结构和时间演变特征 (长期趋势、突变及阶段性 )。指出 ,反映北半球阿留申低压强度的冬季海平面气压距平场的第二特征模态 ,在年际 ,年代际变化关系上与北半球的平均气温关系是非常密切的。

WT5BZ]The 1884~1994 dataset was used to investigate the space/time structures of the anomaly sea level pressure field in relation to mean temperature in northern winters on multi time scales. The four basic modes whose spatial circulation structures and temporal evolution features, including secular trend, abrupt change and phasic behaviors, were documented, indicating that the mode of the second eigenvector (EOF2) of the pressure associated with the intensity of the Aleutian low bears a close relation to the mean temperature on interannual and interdecadal basis. [WT5HZ]