Influence of low Arctic sea-ice minima on anomalously cold Eurasian winters
Influence of low Arctic sea-ice minima on anomalously cold Eurasian winters
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DOI：
10.1029/2008gl037079
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发表时间：
2009-04-28
影响因子：
5.2
通讯作者：
Yamane, Shozo
中科院分区：
文献类型：
--
作者：
Honda, Meiji;Inoue, Jun;Yamane, Shozo
本文研究了初秋北极海冰低量对欧亚大陆冬季气候的影响。观测证据表明，显着的寒冷异常在远东地区在初冬和纬向拉长的寒冷异常从欧洲到远东地区在冬末与减少北极海冰覆盖在前一个夏季到秋季的季节。使用大气环流模式的数值试验结果支持这些概念。在初冬的远程响应被认为是一个固定的Rossby波热产生的异常湍流热通量作为一个结果，在巴伦茨-卡拉海的异常冰盖在晚秋，这往往会导致放大的西伯利亚高压造成远东地区的寒冷条件。在我们的实验中也再现了欧亚大陆冬末的冷异常，这与北大西洋涛动的负位相有关。引文：本田，M.，J. Inoue和S. Yamane（2009），低北极海冰最小值对异常寒冷的欧亚冬季的影响，Geophys。保留信函：36，L08707，doi：10.1029/2008GL037079。
Influence of low Arctic sea-ice minima in early autumn on the wintertime climate over Eurasia is investigated. Observational evidence shows that significant cold anomalies over the Far East in early winter and zonally elongated cold anomalies from Europe to Far East in late winter are associated with the decrease of the Arctic sea-ice cover in the preceding summer-to-autumn seasons. Results from numerical experiments using an atmospheric general circulation model support these notions. The remote response in early winter is regarded as a stationary Rossby wave generated thermally through an anomalous turbulent heat fluxes as a result of anomalous ice-cover over the Barents-Kara Seas in late autumn, which tends to induce an amplification of the Siberian high causing colder conditions over the Far East. The late-winter cold anomalies over Eurasia are also reproduced in our experiment, which is associated with the negative phase of the North Atlantic Oscillation. Citation: Honda, M., J. Inoue, and S. Yamane (2009), Influence of low Arctic sea-ice minima on anomalously cold Eurasian winters, Geophys. Res. Lett., 36, L08707, doi: 10.1029/2008GL037079.