Physics
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...10115637v&link_type=abstract
Journal of Geophysical Research, Volume 101, Issue A7, p. 15637-15644
Physics
6
Ionosphere: Solar Radiation And Cosmic Ray Effects, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Storms And Substorms
Scientific paper
Using a special technique of data analysis, we have found 34 grand minima of solar activity in a 7700-year-long Δ14C record. The method used rests on a proper filtering of the Δ14C record and the extrapolation of verifiable results for the later history back in time. Additionally, we have applied a method of nonlinear dynamics, the recurrence rate, to back up the results. Our findings are not contradictory to the record of grand minima by Eddy [1977] but constitute a considerable extension. Hence it has become possible to look closer at the validity of models. This way, we have tested the model of Barnes et al. [1980]. There are hints for that the grand minima might solely be driven by the 209-year period found in the Δ14C record.
Kurths Juergen
Schwarz Udo
Voss Hauke
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