Climate Network Structure Follows North Atlantic Oscillation Phases

Details Climate Network Structure Follows North Atlantic Oscillation Phases Climate Network Structure Follows North Atlantic Oscillation Phases

2011-09-16

arxiv.org/abs/1109.3633v1

Physics

Atmospheric and Oceanic Physics

7 pages, 4 figures, 1 Table

Scientific paper

We construct a network from climate records of different geographical sites in the North Atlantic. A link between two sites represents the cross-correlations between the records of each site. We find that within the different phases of the North Atlantic Oscillation (NAO) the correlation values of the links are significantly different. By setting an optimize threshold on the correlation values, we find that the number of strong links in the network is increased during times of positive NAO indices, and decreased during times of negative NAO indices. We find a pronounced sensitivity of the network structure to the oscillations which is significantly higher compared to the observed response of spatial average of the records. Our result suggests a new measure that tracks the NAO pattern.

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