A cumulative method of presentation of solar activity secular changes

Details A cumulative method of presentation of solar activity secular changes A cumulative method of presentation of solar activity secular changes

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988baicz..39..355b&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 39, no. 6, Dec. 1988, p. 355-362.

Physics

Geophysics

Secular Variations, Solar Activity, Solar Terrestrial Interactions, Sunspot Cycle, Long Term Effects, Periodic Variations, Solar Activity Effects

Scientific paper

A cumulative graphical method is presented for representing step-wise secular changes in the general trends of solar activity. The cumulative curve is divided into linear sections of several eleven-year cycles. The inclination of this curve is used to estimate the average value of solar relative numbers. The results are compared with previous results (Bumba and Hejan, 1988) concerning the secular changes 22-year periods. Observations covering almost five centuries are divided into four periods of high activity, two periods of low activity, and three or five periods of moderate activity. A table of these periods is given and the implications for geophysics are discussed.

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