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Australian Tree Ring Chronologies as Proxy Data for Solar Variability

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

Data from the Solar Maximum Mission satellite suggests that there is a 0.1 percent variation in solar luminosity over the 11-year solar cycle with maximum output corresponding to maximum sunspot number. Tree ring chronologies can be utilized as proxy data to compile a record of the magnitude of past solar variability. Spectral analysis of tree ring series compiled from a site in Tasmania has established, among others, significant periodicities of about 90 and 11 years. The application of band pass filter techniques shows that the 11-year cycle present in some tree ring series correlates with the Zurich sunspot numbers over the period from AD1700, the extent of accurate sunspot records, with a time lag of about three years.

Type
Solar & Solar System
Information
Publications of the Astronomical Society of Australia , Volume 8 , Issue 3 , 1990 , pp. 292 - 297
Copyright
Copyright © Astronomical Society of Australia 1990

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