Figure 7From: Regional climate pattern during two millennia estimated from annual tree rings of Yaku cedar trees: a hint for solar variability? Results of Fourier analysis of daylight-hour data of Yakushima for July and August, 1938 to 2013. A (24 ± 4)-year periodicity is apparent. Red line indicates the amplitude spectrum of background data produced by MC calculation (virtual data). Details of the MC calculations are given in the text.Back to article page