夏威夷
For all the seasons,NPO is featured with a large-scale meridional dipole in the SLP field over the North Pacific region and resembles the western Pacific pattern in the middle troposphere. The two surface centers are located around Aleutian Islands and the northwest of Hawaii,respectively.
结果表明,作为北太平洋地区海平面气压(SLP)年际变化的第二模态,NPO具有相当正压的结构,在地面表现为阿留申群岛附近和夏威夷群岛西北部附近SLP场的反相变化,在对流层中层的结构与西太平洋型遥相关类似。