Quasi-biennial oscillations extracted from the monthly NAO index and temperature records are phase-synchronized

Using the extension of Monte Carlo Singular System Analysis (MC SSA), based on evaluating and testing the regularity of the dynamics of the SSA modes against the colored noise null hypothesis, we demonstrate detection of oscillatory modes with period of about 27 months in records of monthly average...

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Bibliographic Details
Main Authors: M. Paluš, D. Novotná
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2006
Subjects:
Science
Q
Physics
QC1-999
Geophysics. Cosmic physics
QC801-809
North Atlantic
North Atlantic oscillation
Online Access:https://doaj.org/article/52cdb389f8b64f1699d57a8a0d68bd60
Description
Summary:Using the extension of Monte Carlo Singular System Analysis (MC SSA), based on evaluating and testing the regularity of the dynamics of the SSA modes against the colored noise null hypothesis, we demonstrate detection of oscillatory modes with period of about 27 months in records of monthly average near-surface air temperature from several European locations, as well as in the monthly North Atlantic Oscillation index. According to their period, the detected modes can be attributed to the quasi-biennial oscillations (QBO). The QBO modes extracted from the temperature and from the NAO index underwent synchronization analysis and their phase synchronization has been confirmed with high statistical significance.

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