Inconsistency of the Wolf sunspot number series around 1848

@inproceedings{Leussu2013InconsistencyOT,
  title={Inconsistency of the Wolf sunspot number series around 1848},
  author={Raisa Leussu and Ilya G. Usoskin and Rainer Arlt and Kalevi Mursula},
  year={2013}
}
Leibniz Institute for Astrophysics Potsdam, GermanyReceived / Accepted ABSTRACTAims.Sunspot number is a benchmark series in many studies, but may still contain inhomogeneities and inconsistencies. In particular,an essential discrepancy exists between the two main sunspot number series, Wolf (WSN) and group (GSN) sunspot numbers, before1848. The source of this discrepancy has so far remained unresolved. However, the recently digitized series of solar observationsin 1825–1867 by Samuel Heinrich… CONTINUE READING

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