2010/03/24 by Leif Svalgaard, Svalgaard, Leif
Physics and Astronomy · #Historical Astronomy and Related Studies #History and Developments in Astronomy #Solar and Space Plasma Dynamics #astro-ph.SR #physics.space-ph
paper · pdf · doi:10.48550/arxiv.1003.4666
SOHO23 Conference Proceedings, Astronomical Society of the Pacific
arxiv created 2010/03/24 · arxiv updated 2010/03/25
We review the evidence for the argument that Rudolf Wolf's calibration of the Sunspot Number is likely to be correct and that Max Waldmeier introduced an upwards jump in the sunspot number in 1945. The combined effect of these adjustments suggests that there has been no secular change in the sunspot number since coming out of the Maunder Minimum ~1700.