Alternate Definitions for Northern Annular Mode (NAM)

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Term: Northern Annular Mode (NAM)
Definition: A winter fluctuation in the amplitude of a pattern characterized by low surface pressure in the Arctic and strong mid-latitude westerlies. The NAM has links with the northern polar vortex into the stratosphere. Its pattern has a bias to the North Atlantic and its index has a large correlation with the North Atlantic Oscillation index.
Created 2022.03.08
Last Modified 2023.03.27
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