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Parallels among the “music scores” of solar cycles, space weather and Earth's climate

Published online by Cambridge University Press:  05 July 2012

Zoltán Kolláth ,
Katalin Oláh  and
Lidia van Driel-Gesztelyi
Zoltán Kolláth
Affiliation:
Konkoly Observatory, Budapest, Hungary email: [email protected]
Katalin Oláh
Affiliation:
Konkoly Observatory, Budapest, Hungary email: [email protected]
Lidia van Driel-Gesztelyi
Affiliation:
Konkoly Observatory, Budapest, Hungary email: [email protected] Observatoire de Paris, LESIA, CNRS, UPMC Univ. Paris 06, Univ. Paris-Diderot, Meudon, France University College London, Mullard Space Science Laboratory, UK
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Abstract

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Solar variability and its effects on the physical variability of our (space) environment produces complex signals. In the indicators of solar activity at least four independent cyclic components can be identified, all of them with temporal variations in their timescales.

Time-frequency distributions (see Kolláth & Oláh 2009) are perfect tools to disclose the “music scores” in these complex time series. Special features in the time-frequency distributions, like frequency splitting, or modulations on different timescales provide clues, which can reveal similar trends among different indices like sunspot numbers, interplanetary magnetic field strength in the Earth's neighborhood and climate data.

On the pseudo-Wigner Distribution (PWD) the frequency splitting of all the three main components (the Gleissberg and Schwabe cycles, and an ≈5.5 year signal originating from cycle asymmetry, i.e. the Waldmeier effect) can be identified as a “bubble” shaped structure after 1950. The same frequency splitting feature can also be found in the heliospheric magnetic field data and the microwave radio flux.

Keywords

methods: data analysisSun: activitySun: magnetic fieldssolar-terrestrial relations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S286: Comparative Magnetic Minima: Characterizing quiet times in the Sun and Stars , October 2011 , pp. 423 - 426
Copyright
Copyright © International Astronomical Union 2012

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