Local and hemispheric dynamics of the North Atlantic Oscillation, annular patterns and the zonal index

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• 作者：Geoffrey K. Vallis ; Edwin P. Gerber
• 关键词：Atmospheric dynamics ; Zonal index ; Empirical orthogonal functions ; North Atlantic Oscillation
• 刊名：Dynamics of Atmospheres and Oceans
• 出版年：2008
• 出版时间：March 2008
• 年：2008
• 卷：44
• 期：3-4
• 页码：184-212
• 全文大小：3666 K

文摘

In this paper we discuss the atmospheric dynamics of the North Atlantic Oscillation (NAO), the zonal index, and annular patterns of variability (also known as annular modes). Our goal is to give a unified treatment of these related phenomena, to make explicit how they are connected and how they differ, and to illustrate their dynamics with the aid of an idealized primitive equation model. Our focus is on tropospheric dynamics.