Series of classical solar activity indices: Kislovodsk data

Details Series of classical solar activity indices: Kislovodsk data Series of classical solar activity indices: Kislovodsk data

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sosyr..41...81n&link_type=abstract

Solar System Research, Volume 41, Issue 1, pp.81-86

Physics

96.60.Qd, 96.60.Q-

Scientific paper

We present data on the series of solar activity indices, Wolf sunspot numbers W and total sunspot areas S, obtained at the Kislovodsk high-altitude station of the Pulkovo Observatory. The problem of properly extending the 133-year-long Zürich series of W and the 102-year-long Greenwich series of S, which were discontinued in 1980 and 1976, respectively, is emphasized. We stress that the Kislovodsk data have retained mutual homogeneity with the classical series until now and that they are preferred for extension. The question under consideration is of fundamental importance in studying the solar activity variations on long time scales and related processes in the Sun-Earth system.

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