Australian tree ring chronologies as proxy data for solar variability
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.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 1990
- DOI:
- 10.1017/S1323358000023560
- Bibcode:
- 1990PASA....8..292M
- Keywords:
-
- Dendrochronology;
- Secular Variations;
- Solar Activity;
- Solar Cycles;
- Solar Spectra;
- Solar Maximum Mission;
- Spectrum Analysis;
- Stellar Luminosity;
- Solar Physics