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| Titel |
Is the Atlantic Multidecadal Oscillation (AMO) a statistical phantom? |
| VerfasserIn |
M. Vincze, I. M. Jánosi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 18, no. 4 ; Nr. 18, no. 4 (2011-07-14), S.469-475 |
| Datensatznummer |
250013942
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| Publikation (Nr.) |
 copernicus.org/npg-18-469-2011.pdf |
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| Zusammenfassung |
| In this work we critically compare the consequences of two assumptions on
the physical nature of the AMO index signal. First, we show that the widely used
approach based on red noise statistics cannot fully reproduce the empirical
correlation properties of the record. Second, we consider a process of
long range power-law correlations and demonstrate its better fit to the AMO
signal. We show that in the latter case,
the multidecadal oscillatory mode of the smoothed
AMO index with an assigned period length of 50–70 years can be a simple statistical artifact, a consequence of limited
record length. In this respect, a better term to describe the observed fluctuations of a smooth power-law spectrum is Atlantic Multidecadal Variability
(AMV). |
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