Reconstruction of the annual variation in solar radio flux and the Catania sunspot area from tree ringindex time series
Abstract
Four tree ringindex site chronologies, representing standardized annual growth rates for spruce trees growing at high altitude sites in Colorado, have been employed as proxy data in a regression model for the annual variation of solar radio flux at 2800 MHz (F_{10 x 7}) and the Catania sunspot area (A_{C}). These dendrochronological time series all exhibit significant power spectrum peaks at about 11 years and separately correlate with the annual values of R_{z}, F_{10 x 7} and A_{C}, as solar activity indicators. The two models constructed give the cyclic variation of F_{10 x 7} and A_{C} back to AD1673.
 Publication:

Proceedings of the Astronomical Society of Australia
 Pub Date:
 August 1994
 DOI:
 10.1017/S1323358000019834
 Bibcode:
 1994PASAu..11..164M
 Keywords:

 Magnetic Flux;
 Solar Cycles;
 Sunspots;
 Time Series Analysis;
 Annual Variations;
 Chronology;
 Power Spectra;
 Radiant Flux Density;
 Regression Analysis;
 Solar Physics