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astro-ph2003
A Millennium Scale Sunspot Number Reconstruction: Evidence For an Unusually Active Sun Since the 1940's
Ilya G. Usoskin, Sami K. Solanki, Manfred Schuessler +2
The extension of the sunspot number series backward in time is of considerable interest for dynamo theory, solar, stellar, and climate research. We have used records of the Be-10 c…
astro-ph2003
Reconstruction of solar activity for the last millennium using Be data
I. G. Usoskin, K. Mursula, S. Solanki +2
In a recent paper (Usoskin et al., 2002a), we have reconstructed the concentration of the cosmogenic Be isotope in ice cores from the measured sunspot numbers by using physi…