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A NORTHERN HEMISPHERE ANNULAR MODE AS THE COMBINATION OF THE NAO AND THE PNA

ISSN号：1006-8775
期刊名称：《热带气象学报：英文版》
时间：0
分类：P434[天文地球—大气科学及气象学]
作者机构：[1]LaSW, Chinese Academy of Meteorological Sciences, Beijing, 100081 China, [2]Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044 China, [3]Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland 20742, USA
相关基金：Foundation item： Foundation of Key Laboratory of Meteorological Disaster of Ministry of Education （KLME0702）, LaSW Foundation of the Chinese Academy of Meteorological Sciences, National Key Basic Research and Development Project of China （2009CB421503）, National Natural Science Foundation of China （40775033, 40940022）, Chinese Special Scientific Research Project for Public Interest （GYHY200806009）, Qinglan Project of Jiangsu Province of China （2009）

关键词：环形的模式, NAO-PNA, 观点, AO, annular mode, NAO-PNA perspective, AO

中文摘要：

这份报纸证明一个环形的模式能从北方大西洋摆动(NAO ) 和 Pacific/North 美国人(PNA ) 的联合被构造模式。伪环状，南方的偶极子和构造环形的模式的垂直 barotropy 大西洋摆动(AO ) 模式类似于那些。它也以变化贡献是一个主导的模式。而且，它与 AO 的时间的关联是相当强壮的。这个新环形的模式优于 AO 因为它合并 PNA 的大部分并且做行动的中心在和平更强壮、比 AO 的更身体上相关。或，更通常，它可以被认为是不同于 AO 的一个物理模式。这研究的结果也显示 NAO-PNA 观点包含大多数 AO 的信息，而 AO 观点仅仅关于 NAO-PNA 的信息的一半包含。因而， NAO-PNA 观点被作者考虑比 AO 的更全面。

英文摘要：

This paper demonstrates that an annular mode can be constructed from the combination of the North Atlantic Oscillation （NAO） and the Pacific/North American （PNA） patterns. The quasi-annularity, meridional dipole and vertical barotropy of the constructed annular mode resemble those of the Atlantic Oscillation （AO） pattern. It is also a dominant mode in terms of the variance contribution. Moreover, its temporal correlation with the AO is quite strong. This new annular mode has the advantage over the AO in that it incorporates a large portion of the PNA and makes the center of action in the Pacific stronger and more physically relevant than that of the AO. Or, more generally, it may be regarded as a physical mode unlike the AO. The results of this study also indicate the NAO-PNA perspective contains most of the information of the AO, whereas the AO perspective only contains about half of the information of the NAO-PNA. Consequently, the NAO-PNA perspective is regarded by the authors to be more comprehensive than that of the AO.

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