Impact of the Atlantic Multidecadal Oscillation on North Pacific climate variability
Impact of the Atlantic Multidecadal Oscillation on North Pacific climate variability
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DOI：
10.1029/2007gl031601
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发表时间：
2007-12
影响因子：
5.2
通讯作者：
Rong‐Hua Zhang;T. Delworth
中科院分区：
文献类型：
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作者：
Rong‐Hua Zhang;T. Delworth
研究发现，大西洋年代际振荡（AMO）对太平洋年代际振荡（PDO）有贡献，尤其是PDO中与厄尔尼诺和南方涛动（ENSO）线性无关的分量，即北太平洋年代际振荡（NPMO），以及与之相关的太平洋/北美（PNA）型。使用一个混合版本的GFDL CM2.1气候模式，我们表明，AMO提供了一个源的几十年变化的北太平洋，并需要考虑沿着与其他强迫北太平洋气候变化。北太平洋对北大西洋强迫的滞后响应是通过大气遥相关，并通过海洋动力学和北太平洋上空的正海气反馈得到加强。结果表明，一个北太平洋的制度转变，相反的1976-77年的转变，可能会发生现在的10年后，观测到的AMO的切换到一个积极的阶段，在1995年左右。
In this paper, we found that the Atlantic Multidecadal Oscillation (AMO) can contribute to the Pacific Decadal Oscillation (PDO), especially the component of the PDO that is linearly independent of El Niño and the Southern Oscillation (ENSO), i.e. the North Pacific Multidecadal Oscillation (NPMO), and the associated Pacific/North America (PNA) pattern. Using a hybrid version of the GFDL CM2.1 climate model, we show that the AMO provides a source of multidecadal variability to the North Pacific, and needs to be considered along with other forcings for North Pacific climate change. The lagged North Pacific response to the North Atlantic forcing is through atmospheric teleconnections and reinforced by oceanic dynamics and positive air‐sea feedback over the North Pacific. The results indicate that a North Pacific regime shift, opposite to the 1976–77 shift, might occur now a decade after the switch of the observed AMO to a positive phase around 1995.