The strengthening relationship between Arctic Oscillation and ENSO after the mid‐1990s
The strengthening relationship between Arctic Oscillation and ENSO after the mid‐1990s
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DOI：
10.1002/joc.3828
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Fei Li;Huijun Wang;Jiping Liu
中科院分区：
文献类型：
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作者：
Fei Li;Huijun Wang;Jiping Liu
北极涛动（AO）和ENSO分别对北半球温带和热带气候变化具有主导影响。在本文中，我们通过分析AO、ENSO和相关的大气-海洋变率，发现AO - ENSO关系在20世纪90年代中期之后的1月份有所加强，而在此之前的9月份，北极海冰覆盖（ASIC）的年际变率持续增加。我们的分析进一步表明，较大的ASIC年际变率可能解释了太平洋盆地的大尺度波列，并且AO与北太平洋环流强烈耦合。−AO和阿留申低气压（AL）之间联系的加强可能有助于确定−AO和ENSO之间更密切的关系。
The Arctic Oscillation (AO) and ENSO have dominant influences on the extratropical and tropical climate variabilities in the Northern Hemisphere, respectively. In this paper, we document a strengthening of the AO–ENSO relationship in January after the mid‐1990s, when the interannual variability of the previous September Arctic sea ice cover (ASIC) had consistently increased, by analyzing the AO, ENSO, and associated atmosphere–ocean variability. Our analysis further suggests that the larger ASIC interannual variability may account for the larger scale wave train across the Pacific basin, and the AO is strongly coupled to the circulation in the North Pacific. The strengthened connection between the −AO and Aleutian Low (AL) may contribute to the identified closer relationship between the −AO and ENSO.