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The Downturn in Solar Activity during Solar Cycles 5 and 6

Published online by Cambridge University Press:  25 April 2016

J. O. Murphy
J. O. Murphy*
Affiliation:
Department of Mathematics, Monash University, Clayton Vic 3168
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Abstract

The atmospheric 14C record, the corresponding WM values derived from a carbon reservoir model, auroral numbers and the Zurich relative annual sunspot numbers all demonstrate a substantial downturn in solar activity for the duration of solar cycles 5 and 6. This reduction is also imbedded in some dendrochronological proxy data sets, which describe an annual index radial growth rate for trees at high-altitude sites. A significant lagged correlation can exist between tree-ring indices and the 11–year solar cycle during periods of high solar activity, a feature which is not evident during quiescent periods.

Type
Solar & Solar System
Information
Publications of the Astronomical Society of Australia , Volume 9 , Issue 2 , 1991 , pp. 330 - 331
Copyright
Copyright © Astronomical Society of Australia 1991

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