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Progress in Earth and Planetary Science
Fig. 9 | Progress in Earth and Planetary Science

Fig. 9

From: Solar evolution and extrema: current state of understanding of long-term solar variability and its planetary impacts

Fig. 9

Comparison of total solar irradiance (TSI) variations (top panel) with the sunspot time series (bottom panel). The TSI varies in phase with the solar cycle indicating that during phases of very strong activity, the total radiation output—and hence radiative forcing of the heliosphere—is enhanced. The composite TSI time series data is acquired from PMOD/WRC (Fröhlich 2006)

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