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Three-halves law in sunspot cycle shapeEvidence is provided of a nonlinear effect consisting of a 3/2 power law in annual mean sunspot numbers since 1700. With correction for this nonlinearity, it has been possible to reproduce theoretically the well-known Waldmeier relation between rise time and maximum sunspot number, in addition to other features of the 11 yr sunspot curve such as a break in the decline of strong 11 yr cycles. Eighteenth century sunspot numbers are found to fit theoretical semicycle shapes well. The present model suggests an upward travelling 22 yr wave launched by a reciprocating magnetic oscillator deep in the sun.
Document ID
19880039639
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bracewell, R. N.
(Stanford University CA, United States)
Date Acquired
August 13, 2013
Publication Date
February 15, 1988
Publication Information
Publication: Royal Astronomical Society, Monthly Notices
Volume: 230
ISSN: 0035-8711
Subject Category
Solar Physics
Accession Number
88A26866
Funding Number(s)
CONTRACT_GRANT: NGR-05-020-272
CONTRACT_GRANT: N00014-85-K-0111
Distribution Limits
Public
Copyright
Other

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