letter to the editor: Are the North Atlantic Oscillation and the Southern Oscillation related in any time-scale?

Details letter to the editor: Are the North Atlantic Oscillation and the Southern Oscillation related in any time-scale? letter to the editor: Are the North Atlantic Oscillation and the Southern Oscillation related in any time-scale?

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000angeo..18..247g&link_type=abstract

Annales Geophysicae, vol. 18, Issue 2, pp.247-251

Physics

5

Scientific paper

The North Atlantic Oscillation (NAO) and the Southern Oscillation (SO) are compared from the standpoint of a possible common temporal scale of oscillation. To do this a cross-spectrum of the temporal series of NAO and SO indices was determined, finding a significant common oscillation of 6-8 years. To assure this finding, both series were decomposed in their main oscillations using singular spectrum analysis (SSA). Resulting reconstructed series of 6-8 years' oscillation were then cross-correlated without and with pre-whitened, the latter being significant. The main conclusion is a possible relationship between a common oscillation of 6-8 years that represents about 20% of the SO variance and about 25% of the NAO variance.

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