Abstract
The autocorrelation coefficients of the daily Wolf sunspot numbers over a period of 128 years reveal a number of interesting features of the variability of solar activity. In addition to establishing periodicities for the solar rotation, the solar activity cycle, and perhaps the ‘Gleissberg Cycle’, they suggest that active longitudes do exist, but with much greater strength and persistence in some solar cycles than in others. There is evidence for a variation in the solar rotation period, as measured by sunspot number, of as much as two days between different solar cycles.
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References
Bumba, V. and Howard, R.: 1969, Solar Phys. 7, 28.
Cole, T. W.: 1973, Solar Phys. 30, 103.
Eddy, J. A., Noyes, R. W., Wohlbach, J. B., and Boornazian, A. A.: 1978, Bull Am. Astron. Soc. 10, 400.
Gilman, P. A.: 1974, Ann. Rev. Astron. Astrophys. 12, 47.
Kiepenheuer, K. O.: 1953, in G. P. Kuiper (ed.), The Sun, Univ. of Chicago Press, Chicago, p. 338.
Knight, J. W., Schatten, K. H., and Sturrock, P. A.: 1979, Astrophys. J. Letters 227, L153.
Letfus, V.: 1976, Contr. Astron. Obs. Skalnate Pleso 6, 255.
Maris, G.: 1976, Contr. Astron. Obs. Skalnate Pleso 6, 251.
Newton, H. W. and Nunn, M. L.: 1951, Monthly Notices Roy. Astron. Soc. 11, 413.
Ramanuja Rao, K.: 1973, Solar Phys. 29, 457.
Toman, K.: 1967, J. Geophys. Res. 72, 5570.
Southworth, R. W.: 1960, in A. Ralston and H. S. Wilf (ed.), Mathematical Methods for Digital Computers, John Wiley & Sons, New York, p. 213.
Sawyer, C.: 1968, Ann. Rev. Astron. Astrophys. 6, 115.
Vitinskij, Ju. I.: 1969, Solar Phys. 7, 210.
Waldmeier, M.: 1961, The Sunspot Activity in the Years 1610–1960, Schulthess & Co. AG, Zurich.
Ward, F.: 1966, Astrophys. J. 145, 416.
Wilcox, J. M. and Howard, R.: 1970, Solar Phys. 13, 251.
Wilcox, J. M., Schatten, K. H., and Tanenbaum, A. S.: 1970, Solar Phys. 14, 255.
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The National Center for Atmospheric Research is sponsored by the National Science Foundation.
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Bogart, R.S. Recurrence of solar activity: Evidence for active longitudes. Sol Phys 76, 155–165 (1982). https://doi.org/10.1007/BF00214137
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DOI: https://doi.org/10.1007/BF00214137