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Paper: Semi-empirical Long-term Reconstruction of the Heliospheric Parameters: Validation by Cosmogenic Radionuclide Records
Volume: 504, Coimbra Solar Physics Meeting: Ground-based Solar Observations in the Space Instrumentation Era
Page: 269
Authors: Asvestari, E.; Usoskin, I. G.; Cameron, R. H.; Krivova, N. A.
Abstract: We have developed a semi-empirical model that describes the heliospheric modulation of galactic cosmic rays considering different heliospheric parameters. This model is an improvement of a previous model. The parameters of the model are fitted using the observations and reconstructions of the heliospheric parameters for the period 1976 - 2013, which includes the latest very weak solar minimum. The modulation potential is computed since 1610 using different reconstructions of the open solar magnetic flux and it is then used to compute the production and distribution of cosmogenic isotope 14C, which was subsequently compared with terrestrial archives in tree rings. It is shown that the group sunspot number series by Svalgaard & Schatten (2015) is inconsistent with the data, while other series agree well.
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