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Multivariate analysis of intermediate periodicities of the green corona

  • S. Mancuso (a1), T. S. Lee (a2), C. Taricco (a1) (a3) and S. Rubinetti (a1) (a3)

Abstract

Solar activity is observed to fluctuate with time, undergoing a wide range of periodicities from minutes up to thousands of years as evinced from proxies based on cosmogenic isotopes. In this work, we apply Multichannel Singular Spectrum Analysis (MSSA), a data-adaptive, multivariate technique that simultaneously exploits the spatial and temporal correlations of the input data to extract common modes of variability to investigate the intermediate quasi-periodicities of the green coronal emission line at 530.3 nm for the period between 1944 and 2008. A preliminary MSSA analysis confirms the presence of significant quasi-biennial oscillations in the data with amplitude varying significantly with time and latitude. On the other hand, a clear North-South asymmetry is observed both in their intensity and period distribution.

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Keywords

Multivariate analysis of intermediate periodicities of the green corona

  • S. Mancuso (a1), T. S. Lee (a2), C. Taricco (a1) (a3) and S. Rubinetti (a1) (a3)

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