A Cyclogram Analysis of the Bratislava 14C Tree-Ring Record During the Last Century
MetadataShow full item record
CitationAttolini, M. R., Galli, M., Nanni, T., & Povinec, P. (1989). A cyclogram analysis of the Bratislava 14C tree-ring record during the last century. Radiocarbon, 31(3), 839-845.
DescriptionFrom the 13th International Radiocarbon Conference held in Dubrovnik, Yugoslavia, June 20-25, 1988.
AbstractRadiocarbon variations in dated tree-ring samples represent an important tool for the study of the history of solar activity and sun-earth relationships. From this point of view, an investigation of the 11-year radiocarbon cycle is very important. Our cyclogram analysis of the Delta-14C record in tree-ring samples during the last century has confirmed previous results obtained by conventional harmonic analysis, eg, the average amplitude of 2%, the phase shift of 3-5 yr for different 11-yr solar cycles, and the anticorrelation dependence of Delta-14C on Wolf sunspot numbers. The observed shorter periodicity (ca 9 yr for Delta-14C compared to 10.5 yr for sunspots), may be due to extra factors in sun-earth relationships.