Relationship between Arctic Oscillation and Pacific Decadal Oscillation on decadal timescale
Relationship between Arctic Oscillation and Pacific Decadal Oscillation on decadal timescale
复制标题
DOI：
10.1007/s11434-004-0221-3
复制
发表时间：
2006
影响因子：
--
通讯作者：
Jian Sun;Huijun Wang
中科院分区：
文献类型：
--
作者：
Jian Sun;Huijun Wang
本文研究了11月至次年3月冬季延长期间太平洋年代际涛动（PDO）与北极涛动（AO）在年代际尺度上的关系。结果表明，AO对PDO的低频变异性起着重要作用。当AO领先PDO 7-8年时，两者的滞后相关性最强，相关系数为0.77。AO的主导年代际变化为PDO的变化提供了有价值的预报信号。回归分析和滞后相关分析结果揭示了AO与PDO耦合的可能机制：强AO将导致阿留申低压增强，并通过北太平洋海气相互作用与PDO相联系，反之亦然。
The relationship between the Pacific Decadal Oscillation (PDO) and the Arctic Oscillation (AO) on decadal timescale in the extended winter (November–March) is investigated in this study. The results indicate that AO plays an important role in the low frequency variability of PDO. When AO leads PDO by 7–8 years, the lagging correlation between them becomes the strongest with correlation coefficient 0.77. The leading decadal variability of AO pro-vides a valuably precursory signal for predicting the variability of PDO. The results of regression and lagging correlation reveal the possible mechanism for the AO-PDO coupling: A strong AO would lead to an enhanced Aleutian Low that is linked to PDO by ocean-atmosphere interaction in the North Pacific, andvice versa.