• Short-Term Variations in Radiocarbon Concentration with the 11-Year Solar Cycle

      Povinec, Pavel; Burchuladze, A. A.; Pagava, S. V. (American Journal of Science, 1983-01-01)
      Previous investigations on short-term 14C variations in tree rings are compared with 14C measurements in wine samples. The comparison is made for 4 solar cycles (1903-1944) with the same method of statistical evaluation of measured results. The average amplitude of Delta-14 variations as observed by various authors in tree-ring samples is ca 2 +/1 per mil; however, wine samples show an average amplitude of 4.3 +/1.6 per mil. The anticorrelation dependence of Delta-14C on Wolf sunspot numbers was observed with a time shift between W maxima and Delta-14C minima of 3-5 yr for different solar cycles.