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Appendix A: Schematic overview of the empirical model for the solar cycle

Figure A.1 provides a schematic summary of the procedure underlying our empirical tool. The green box illustrates the detailed treatment of the evolution of a sunspot group. All the parameters included in the model have been found to be important in order to obtain results that are in reasonable agreement with the observations. In the following scheme, U, Pois, , and are, respectively, the uniform, Poisson, Gaussian, and log-normal distributions. The location in longitude of each sunspot group is represented by O.

	Fig. A.1 Summary of the empirical cycle model. The green box shows how the evolution of a spot group is determined in our model.
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© ESO, 2015