The changing relationship between the NAO and northern hemisphere climate variability
The changing relationship between the NAO and northern hemisphere climate variability
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DOI：
10.1029/2001gl014052
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发表时间：
2002-04
影响因子：
5.2
通讯作者：
Jian Lu;R. Greatbatch
中科院分区：
文献类型：
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作者：
Jian Lu;R. Greatbatch
海平面压力（SLP）差横跨弗拉姆海峡被用作代理冰出口通过海峡，以验证NAO和弗拉姆海峡冰出口之间的联系的长期变化发生在1980年左右，并且这种变化是与一个东移的SLP模式与NAO。另外两个变量，西伯利亚冬季温度和北大西洋风暴活动指数，也被发现从不相关的冰出口代理在20世纪50年代和60年代的强烈相关的20世纪80年代和90年代，这表明出现了一个新的气候制度与NAO。我们认为，这一新的气候制度的建立与整个世纪NAO指数和罗杰斯北大西洋第一个风暴活动模式之间的互相关的上升趋势有关。
Sea level pressure (SLP) difference across Fram Strait is used as a proxy for ice export through the Strait to verify that a secular change in the link between the NAO and Fram Strait ice export occurred around 1980, and that the change was associated with an eastward shift in the SLP pattern associated with the NAO. Two additional variables, Siberian winter temperature, and an index of North Atlantic storm activity, are also found to switch from being uncorrelated with the ice export proxy in the 1950's and 60's to being strongly correlated in the 1980's and 90's, suggesting the emergence of a new climate regime associated with the NAO. We argue that the establishment of this new climate regime is related to an upward trend throughout the whole of the 20th century in the cross‐correlation between the NAO index and Rogers' first storm activity mode for the North Atlantic.