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Fig. 4


Top panel: composite TSI time series (at the top) and its wavelet local/global power spectra (in the center/to the right) considering long-term contributions. The most dominant feature of the spectrum is the 11 year cycle periodicity (P = 3840 days). Bottom panel: the long-term contributions are removed. The intermediate- and short-term periodicities are clearly identified: 364 days (annual solar feature related to magnetic fluxes generated deep inside the Sun), 158 days (Rieger-type period), 30 days (solar rotation period) and 14 days (harmonic of the rotation period and associated to solar active regions). Contour levels are 90%, 80%, 70%,..., 20% and 10% of the map maximum. The contour levels are not plotted in the bottom panel for better viewing of periods. The 6th-order Morlet wavelet was used.

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